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Whiting Petroleum Announces Fourth Quarter and Full-Year 2007 Operating and Financial Results

February 27, 2008
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DENVER, Feb. 27 /PRNewswire-FirstCall/ — Whiting Petroleum Corporation today reported fourth quarter 2007 net income of $45.8 million, or $1.08 per basic and diluted share, on total revenues of $232.4 million. This compares to fourth quarter 2006 net income of $28.0 million, or $0.76 per basic and diluted share, on total revenues of $186.6 million. Discretionary cash flow in the fourth quarter of 2007 totaled $139.9 million, compared to the $83.8 million reported for the same period in 2006. A reconciliation of discretionary cash flow to net cash provided by operating activities is included at the end of this news release. The 64% increase in net income and the 67% increase in discretionary cash flow in the fourth quarter of 2007 versus the comparable 2006 period was primarily the result of a 48% increase in the Company’s net realized oil price.

Production in the fourth quarter of 2007 totaled 3.71 million barrels of oil equivalent (MMBOE), of which 2.47 million barrels were crude oil (67%) and 1.24 MMBOE was natural gas (33%). This fourth quarter 2007 production total equates to a daily average production rate of 40,340 barrels of oil equivalent (BOE), which compares to the 41,300 BOE per day average rate in 2006′s fourth quarter. The moderate decline in volumes was primarily the result of property sales in 2007, which represented approximately 1,130 BOE per day as of the dates of disposition.

Full-year 2007 Results

For the full-year 2007, Whiting reported net income of $130.6 million, or $3.31 per basic share and $3.29 per diluted share, on total revenues of $818.7 million. This compared to 2006 net income of $156.4 million, or $4.26 per basic share and $4.25 per diluted share, on total revenues of $778.8 million. Discretionary cash flow in 2007 totaled $422.2 million compared to $426.2 million in 2006.

Oil and gas production in 2007 totaled 14.71 MMBOE, or an average of 40,290 BOE per day. This rate compared to the 41,530 BOE per day average, or 15.16 MMBOE total, produced in 2006. Again, the moderate decline in volumes was primarily the result of property sales in 2007, which represented approximately 1,130 BOE per day as of the dates of disposition.

Proved Reserves

Whiting’s total proved reserves at December 31, 2007 were 250.8 MMBOE, of which 78% was oil. We invested 73% of our $556.6 million exploration and development expenditures in 2007 in the conversion of proved undeveloped (PUD) reserves to proved developed reserves through the development of conventional PUD reserves and the expansion and implementation of our two CO2 projects. This helped bring our proved developed reserves as a percentage of our total reserves to 67%, compared to 65% at year-end 2006 and 59% at year-end 2005. The continuing development or de-risking of our proved reserve base is further reflected in the increase of our proved developed producing reserves. Despite the 14.7 MMBOE of production during 2007, Whiting’s proved developed producing reserves increased 10 MMBOE from year-end 2006. With only 27% of our 2007 capital budget directed toward adding reserves, we managed to increase our total proved reserves to 250.8 MMBOE from 248.2 MMBOE at year-end 2006. During 2007, Whiting had 14.7 MMBOE of production and 2.9 MMBOE of divestitures. Offsetting this 17.6 MMBOE of production and property sales, 20.2 MMBOE of proved reserves were added during 2007. Of this 20.2 MMBOE, 17.8 MMBOE was generated through extensions and discoveries and 2.4 MMBOE came from acquisitions and revisions to previous estimates. Whiting’s December 31, 2007 reserve estimates were prepared by the independent petroleum engineering consulting firm of Cawley Gillespie & Associates, Inc. A schedule of the Company’s pre-tax PV10 value totaling $5.858 billion and its standardized measure of discounted future net cash flows totaling $4.012 billion at year- end 2007 is included at the end of this news release. At year-end 2006, these values were $3.352 billion and $2.392 billion, respectively.

James J. Volker, Whiting’s Chairman, President and CEO, commented, “This is an exciting time for Whiting and our shareholders as we plan to build our 2008 production with additional drilling on our 2007 discoveries and the response from our CO2 injection. This year, we expect to show organic growth in both production and reserves through our drilling programs in the Bakken and in the Piceance Basin and from the implementation of our two CO2 projects. To this end, we have set a 2008 capital budget of $640 million, of which we plan to invest approximately 54% in exploration and development of currently non-proved reserves. This represents a change from 2007 when approximately 27% of our $556.6 million in exploration and development expenditures was directed toward non-proved reserves. In 2007, $284.9 million was directed to our CO2 projects, including CO2 purchases.”

Our total exploration and development expenditures during 2007 (shown in millions of dollars) were as follows:

                                 Other       Extensions                              Conversions       and        Exploration Per     Total    Postle/NWE       From PUD      Discoveries   Income Statement    $ 556.6      $ 284.9        $ 123.4        $ 121.0             $ 27.3    

“In 2008, we expect to invest approximately $154 million, including CO2 purchases, in Postle and North Ward Estes. The $154 million is composed of $80 million at Postle and $74 million at North Ward Estes. Therefore, investment in these properties will decline approximately $130.9 million on a year-over-year basis.”

Mr. Volker continued, “In addition to the reserves we are finding in the Bakken oil play and our Piceance Basin gas play, over time we believe significant upside potential exists from 94.4 MMBOE of probable and possible reserves in the Postle, North Ward Estes and ancillary fields. Our current mix of oil and natural gas reserves is 78% oil and 22% natural gas, and our production volumes are currently 67% oil, including natural gas liquids (NGLs), and 33% natural gas. Crude continues to sell at a premium to natural gas based on their approximate 6-to-1 Btu equivalency. We expect that relationship to continue.”

Other Noteworthy Events and Results in the Fourth Quarter and Full-year 2007

   — At year-end 2007, Whiting held a total of 118,348 gross acres (83,033      net acres) at its Robinson Lake prospect, which has been designated the      Sanish field, in Mountrail County, North Dakota.  The field produces      oil and gas from the Middle Bakken formation at a vertical depth of      approximately 9,900 feet.  We currently have four rigs working in the      field and plan to add a fifth rig in April 2008.  By year-end 2008, we      expect to have as many as nine rigs working in the area.  In 2008, we      plan to drill approximately 30 to 40 operated wells in the Sanish field      with an average working interest of 81%.  We expect most of these to be      single-lateral wells drilled on 1,280-acre spacing units.  Ultimately,      we may drill two single-lateral wells per 1,280-acre spacing unit.  We      estimate this could generate a total of up to 170 well locations.       Whiting reported the completion results of three significant Bakken oil      and gas producers in the Sanish field in 2007 and early 2008.  The      following table summarizes the results:                                             IP (BOE/D)                                Completion  24-hr.   1st 30 Days      Well Name      WI    NRI     Date      Test      (BOE/D)     Comment                                                                    Single   Liffrig 11-27H    81 %   67 %  01/24/08     2,530     1,114      Lateral                                                                   Single   Locken 11-22H     99 %   82 %  12/16/07     1,651       946      Lateral   Peery State                                                     Triple    11-25H           99 %   80 %  05/13/07     1,254       825      Lateral       The gas produced from the Sanish field contains large amounts of NGLs      and has a Btu content of approximately 1,700 per cubic foot.  In      December 2007, Whiting broke ground for the construction of a natural      gas processing plant that will extract these liquids and allow the      natural gas to be transported by pipeline to market.  The Company      anticipates that the plant will be on stream in April 2008.  The      initial capacity of the plant will be 3 MMcf of gas per day and is      expected to increase to approximately 33 MMcf of gas per day in the      fourth quarter of 2008.  The yield from the plant is expected to      approximate 150 to 170 barrels of NGLs per 1 MMcf of gas.    — Immediately east of the Sanish field is the Parshall field, where      Whiting owns interests in 66,957 gross acres (13,470 net acres) and has      participated in 24 wells that produce from the Bakken formation, 19 of      which were drilled in 2007.  For the first 15 wells that produced for      120 days, production rates averaged 591 BOE per day per well.  We      expect to participate in approximately 50 to 60 wells in the Parshall      field in 2008 with an average working interest of 20%.  Eight drilling      rigs are currently working in the Parshall field.    — In the Piceance Basin, Whiting drilled and completed three gas      producers at its Boies Ranch prospect in Rio Blanco County, Colorado      during 2007.  Each well flowed at an initial rate of approximately      2.3 MMcf of gas per day from approximately 565 feet of net pay in the      Williams Fork and Iles formations perforated at depths between 6,500      and 10,900 feet.  Whiting holds an average working interest of 50% and      an average net revenue interest of 45% in the three gas producers.      Production from these three wells was shut in for most of the third      quarter and all of October 2007 as repairs were made to a nearby gas      plant where Boies Ranch gas is currently processed.  Production resumed      from the Boies Ranch area in November 2007 at a combined gross rate of      approximately 3.5 MMcf per day (1.6 MMcf of gas per day net to the      Company’s interests).       At year-end 2007, we had six wells awaiting completion operations and      two wells that were being drilled at Boies Ranch.  Whiting holds 2,760      gross acres (1,571 net acres) on the Boies Ranch and Jimmy Gulch      prospects.  In addition, we own 14,133 gross federal lease acres (2,501      net acres) in the Boies Ranch/Jimmy Gulch area.       We plan to drill a total of 110 wells on Boies Ranch and Jimmy Gulch,      24 of which are planned for 2008.  The wells are scheduled to be      drilled on 20-acre spacing units.  The Company plans to have a minimum      of two drilling rigs running full time in the Piceance Basin through      2008.  Drilling operations are expected to commence at Jimmy Gulch in      the third quarter of 2008.  We are drilling groups of four to eight      wells off of pads.  Our rigs move from well to well on each pad.      Across our Boies Ranch and Jimmy Gulch prospects, our ownership ranges      from 50% to 100% working interests and 49% to 89% net revenue      interests.       At Boies Ranch by April 15, 2008, we expect to complete a 2.9-mile,      10-inch diameter pipeline that will have a total daily capacity of      approximately 80 MMcf of gas and will connect to a supply trunk line      feeding a 750 MMcf per day treating and processing facility connected      to the Rockies Express pipeline (REX) that gives us access to multiple      intrastate and interstate markets.  We expect our new pipeline      connection will allow us to market all of our gas at Boies Ranch      without restriction.  The 42-inch diameter REX pipeline currently has a      capacity of transporting 1.5 Bcf of gas per day.  When REX came on      stream in January 2008, Rocky Mountain gas price differentials narrowed      significantly. Currently, we expect our Boies Ranch gas will receive      NYMEX prices less approximately $1.00 – $1.40 during the remainder of      2008.    — Whiting’s expansion of its CO2 flood at the Postle field, located in      Texas County, Oklahoma, is generating positive results.  Production      from the field has increased from a net 4,200 BOE per day at the time      of its acquisition in August 2005 to a net 5,800 BOE per day in      December 2007, an increase of 38%.  Our objective has been to increase      CO2 injection into the field’s producing reservoir to 120 MMcf per day      from approximately 60 MMcf per day at the time we acquired the field.      We surpassed the 120 MMcf daily rate in January 2008.       The increase in CO2 injection and production was made possible through      development drilling and the expansion of our 100% owned Dry Trail Gas      Plant, which included the installation of three new compressors and the      associated infrastructure.  The majority of the capital expenditures      required for the expansion of the Postle CO2 flood are now behind us.      Future capital expenditures are currently estimated as follows:          Period     Hard CAPEX (MM$)   CO2 Purchases (MM$)    Totals (MM$)    2008                 $62                  $18                $80   Thereafter            45                  134                179   Totals              $107                 $152               $259       This project is part of the Company’s plan to expand the existing water      and CO2 flood from the eastern half of the Postle field to the western      half of the field.  The field includes six producing units covering a      total of approximately 25,600 gross acres (24,223 net acres) with      working interests of 94% to 100%.  As of December 31, 2007, there were      156 producing wells and 119 injection wells completed in the Morrow      zone at 6,100 feet.    — On May 22, 2007, Whiting initiated its CO2 flood in the North Ward      Estes field, located in Ward and Winkler Counties, Texas.  Whiting’s      target for CO2 injection into the field was 100 MMcf per day by the end      of the first quarter of 2008.  This milestone was reached in January      2008, and we are currently injecting approximately 120 MMcf into the      Yates formation, the field’s producing reservoir, at a depth of      approximately 2,600 feet.  We expect an initial response from this CO2      flood during the fourth quarter of 2008.  Net production from North      Ward Estes in December 2007 averaged 5,050 BOE per day, which compared      to a net daily rate of 3,560 BOE during the first quarter of 2005,      prior to Whiting’s July 2005 agreement to acquire the North Ward Estes      field.       Construction of the gas plant facility and the related infrastructure      at North Ward Estes field is expected to be completed in 2008.  Future      capital expenditures for this CO2 project are estimated as follows:          Period     Hard CAPEX (MM$)   CO2 Purchases (MM$)    Totals (MM$)    2008                $41                  $33                $74   Thereafter          212                  339                551   Totals             $253                 $372               $625       The North Ward Estes field includes six base leases with 100% working      interest in 58,000 gross and net acres.  As of December 31, 2007, there      were 1,024 producing wells and 349 injection wells.  In addition to the      Yates formation, production exists in other zones, including the Queen      at 3,000 feet.  We also have the rights to deeper horizons under 34,140      gross acres in the field.       The table below summarizes the estimated fully developed costs per BOE      at Postle, North Ward Estes and ancillary fields acquired with North      Ward Estes:                                                         Reserves or  Acq. and                                                      Production   Dev. Cost                                           Net (MM$)  (Net MMBOE)   ($/BOE)    Acquisition Purchase Price (effective    7/1/05)                                   $802   Remaining Proved at 12/31/07 –    Capex/Reserves                             902 (1)    123.9   Six Months 2005 – Capex/Production           75          1.9   2006 – Capex/Production                     221          4.3   2007 – Capex/Production                     285          4.4   2006 & 2007 Divestments – Sales Price        (8)           –   Total Actual Plus Proved at 12/31/07 –    Capex/Reserves                           2,277        134.5   $16.93 (2)   Probable and Possible at 12/31/07 –    Capex/Reserves                             154         94.4   Total Actual Plus All Reserve Cats. –    Capex/Reserves                          $2,431       $228.9   $10.62 (2)    (1)  More than half of the $225 MM (11%) increase in the all-in proved        cost estimate, from $2,052 MM at year-end  2006 to $2,277 MM at        year-end 2007, is attributable to the NYMEX indexed CO2 price at        North Ward Estes.    (2)  Estimated capital expenditures reflect an expanded scope in planned        projects as well as the increasing cost of industry equipment and        services and CO2.  Although total acquisition and development costs        increased 11%, the pre-tax PV10 value of these fields increased from        $1,417 MM at year-end 2006 to $2,924 MM at year-end 2007, an increase        of 106%.    — During 2007, Whiting received proceeds of $52.6 million from the sale      of properties located primarily in South Texas.  The divested      properties had proved reserves of 2.9 MMBOE and average net daily      production of 1,130 BOE as of their dates of disposition.    — In July 2007, Whiting completed a public offering of common stock at a      price of $40.50 per share.  The offering, including the exercise of the      overallotment option, resulted in the total sale of 5,425,000 shares of      Whiting’s common stock.  Whiting received net proceeds of approximately      $210.4 million, after deducting underwriting discounts, commissions and      expenses of the offering.  Whiting used all of the net proceeds that it      received from the offering to repay a portion of the debt outstanding      under its credit agreement.  As a result of the stock offering and the      South Texas property sale, the Company’s debt to total capitalization      ratio was reduced from 47.1% at June 30, 2007 to 36.8% at December 31,      2007 and positions Whiting for future growth.    — Whiting’s bank syndicate increased the Company’s borrowing base to      $900 million effective November 1, 2007.  At December 31, 2007, Whiting      had drawn $250 million under the credit agreement.       The following table summarizes the Company’s net production and      commodity price realizations for the quarters ended December 31, 2007      and 2006:                                            Three Months Ended                                       12/31/07      12/31/06      Change   Production     Oil and condensate (MMbbls)          2.47          2.47           –     Natural gas (Bcf)                    7.43          8.00         (7%)     Equivalent (MMBOE)                   3.71          3.80         (2%)    Average Sales Price     Oil and condensate (per Bbl):       Price received                   $82.38        $50.57         63 %       Effect of crude oil hedging       (7.72)            –     Realized price                     $74.66        $50.57         48 %      Natural gas (per Mcf):       Price received                    $6.37         $5.89          8 %       Effect of natural gas hedging         –          0.29     Realized price                      $6.37         $6.18          3 %       Whiting recorded a loss of $19.1 million on its crude oil hedges during      the fourth quarter of 2007, as compared to a gain of $2.4 million on      its natural gas hedges in the fourth quarter of 2006.  A summary of      Whiting’s outstanding hedges is included later in this news release.      Fourth Quarter and Full-Year 2007 Costs and Margins   A summary of cash revenues and cash costs on a per BOE basis is as   follows:                                           Per BOE, Except Production                                     Three Months           Twelve Months                                   Ended December 31,     Ended December 31,                                    2007        2006       2007        2006    Production (MMBOE)               3.71        3.80      14.71       15.16    Sales price, net of hedging    $62.52      $45.85     $53.57      $50.52   Lease operating expense         14.65       12.74      14.20       12.12   Production tax                   4.72        2.70       3.56        3.11   General & administrative         2.99        2.24       2.66        2.49   Exploration                      2.23        2.35       1.86        1.98   Cash interest expense            3.88        4.54       4.49        4.37   Cash income tax expense         (1.35)       3.11       0.04        0.81                                  $35.40      $18.17     $26.76      $25.64   

Whiting’s fourth quarter 2007 production was 3.71 MMBOE. Our guidance was 3.70 MMBOE to 3.80 MMBOE. We anticipate completion of six Piceance Basin gas wells that were drilled in 2007 through the second quarter of 2008. We expect all six wells to be on stream by the end of the second quarter of 2008, as our Boies Ranch pipeline is scheduled to be in operation early in the second quarter.

Our lease operating expenses of $14.65 per BOE slightly exceeded our fourth quarter guidance of $14.00 to $14.40. Although part of our ongoing development plan, a portion of the continuing wellbore work at the Company’s North Ward Estes and Postle CO2 projects must be expensed for accounting purposes. We expect this type of work to continue through 2008.

Our general and administrative expenses of $2.99 per BOE in the fourth quarter of 2008 exceeded our guidance of $2.55 to $2.65 due primarily to higher net revenues and sale proceeds, which caused additional payments due under our Production Participation Plan.

The Company’s fourth quarter DD&A rate per BOE was below previously announced guidance. This was primarily the result of positive reserve adjustments and an increase in the pricing assumptions used in our reserve report, which had the effect of extending the economic life of many of our wells. This created additional economic reserve volumes and a correspondingly lower DD&A rate.

During the fourth quarter, our company-wide basis differential for crude oil compared to NYMEX was $8.25 per barrel, which compared to $9.65 per barrel in the fourth quarter of 2006 and $7.52 per barrel in the third quarter of 2007. The increase from the third quarter of 2007 was due to increasing differentials in our Rocky Mountain and Permian regions. We expect our oil price differential to continue at approximately $8.00 to $8.50 in 2008.

During the fourth quarter, our company-wide basis differential for natural gas compared to NYMEX was $0.60 per Mcf, which compared to guidance of $1.00 to $1.20 per Mcf. The smaller differential was the result of narrowing price differentials for all of our regions. We expect our gas price differential to remain at $0.50 to $0.70 in 2008.

   Fourth Quarter and Full-year 2007 Drilling Summary   The table below summarizes Whiting’s drilling activity and exploration and   development costs incurred for the three and twelve months ended   December 31, 2007:                                  Gross/Net Wells Completed                                                               Expl. & Dev.                                       Total New    % Success      Cost            Producing   Non-Producing   Drilling      Rate     (in millions)    Q407     66 / 32.5      1 / 0.9     67 / 33.4    99% / 97%        $165.9   12M07   271 / 134.7     6 / 3.9    277 / 138.6   98% / 97%        $556.6   

Currently, Whiting is operating 11 drilling rigs and 44 workover rigs on its properties and is participating in the drilling of 14 non-operated wells. Of these workover rigs, 23 are operating in the North Ward Estes field and six are working in the Postle field.

Outlook for First Quarter and Full-year 2008

The following statements provide a summary of certain estimates for the first quarter and full-year 2008 based on current forecasts. Whiting’s full-year 2008 capital budget is $640 million (excluding acquisition costs).

   Guidance for the first quarter of 2008 and full-year 2008 is as follows:                                                        Guidance                                            First Quarter        Full-Year                                                 2008              2008    Production (MMBOE)                       3.65  –    3.75   15.50  –  15.70   Lease operating expense per BOE        $14.80  –  $15.20  $14.60  – $15.00   General and admin. expense per BOE     $ 2.90  –  $ 3.10  $ 2.90  – $ 3.00   Interest expense per BOE               $ 4.10  –  $ 4.20  $ 4.05  – $ 4.15    Depr., depletion and amort. per BOE    $13.40  –  $13.80  $14.10  – $14.50    Prod. taxes (% of production revenue)    6.5%  –    6.9%    6.5%  –   6.9%   Oil Price Differentials to    NYMEX per Bbl                         $ 8.00  –  $ 8.50  $ 8.00  – $ 8.50   Gas Price Differentials to    NYMEX per Mcf                         $ 0.50  –  $ 0.70  $ 0.50  – $ 0.70      Oil Hedges and Fixed-Price Gas Contracts   Whiting’s outstanding oil hedges and fixed-price gas contracts as of   January 1, 2008 are summarized below:                                         NYMEX Price Collar   As a Percentage              Contracted Volume               Range           of Dec. 2007   Hedges       Bbls per Month              (per Bbl)        Oil Production    2008   Q1               110,000              $49.00 – $70.65            13 %   Q1               120,000              $60.00 – $73.90            14 %   Q1               100,000              $65.00 – $80.30            12 %   Q2               110,000              $48.00 – $71.60            13 %   Q2               120,000              $60.00 – $74.65            14 %   Q2               100,000              $65.00 – $80.50            12 %   Q3               110,000              $48.00 – $70.85            13 %   Q3               120,000              $60.00 – $75.60            14 %   Q3               100,000              $65.00 – $81.00            12 %   Q4               110,000              $48.00 – $70.20            13 %   Q4               120,000              $60.00 – $75.85            14 %   Q4               100,000              $65.00 – $81.20            12 %                              Natural Gas       2008 Contract    As a Percentage                         Volumes in          Price (1)        of Dec. 2007   Fixed Price         MMBtu per Month       per MMBtu       Gas Production    Contracts    Jan. 2008 – May 2011       26,000              $4.94               1 %   Jan. 2008 – Sep. 2012      67,000              $4.38               3 %    (1) Annual 4% price escalation on fixed price contracts.                   Selected Operating and Financial Statistics                                     Three Months Ended       Year Ended                                       December 31,         December 31,                                        2007      2006       2007      2006   Selected operating statistics    Production     Oil and condensate, MBbl          2,473     2,466      9,579     9,799     Natural gas, MMcf                 7,427     8,001     30,764    32,147     Oil equivalents, MBOE             3,711     3,800     14,706    15,157    Average Prices     Oil, Bbl (excludes hedging)      $82.38    $50.57     $64.57    $57.27     Natural gas, Mcf (excludes      hedging)                         $6.37     $5.89      $6.19     $6.59    Per BOE Data     Sales price (including hedging)  $62.52    $45.85     $53.57    $50.52     Lease operating                  $14.65    $12.74     $14.20    $12.12     Production taxes                  $4.72     $2.70      $3.56     $3.11     Depreciation, depletion and      amortization                    $13.37    $12.08     $13.11    $10.74     General and administrative        $2.99     $2.24      $2.66     $2.49    Selected Financial Data    (In thousands, except    per share data)     Total revenues and      other income                  $232,363  $186,591   $818,718  $778,827     Total costs and expenses       $160,666  $143,944   $611,556  $545,555     Net income                      $45,750   $27,950   $130,600  $156,364     Net income per common share,      basic                            $1.08     $0.76      $3.31     $4.26     Net income per common share,      diluted                          $1.08     $0.76      $3.29     $4.25      Average shares outstanding,      basic                           42,237    36,744     39,483    36,736     Average shares outstanding,      diluted                         42,388    36,860     39,645    36,826     Net cash provided by operating      activities                    $121,423   $59,329   $394,032  $411,209     Net cash used in investing      activities                   $(141,924) $(98,887) $(466,971) $(527,579)     Net cash provided by financing      activities                     $26,574   $46,180    $77,345  $116,360     Conference Call  

The Company’s management will host a conference call with investors, analysts and other interested parties on Thursday, February 28, 2008 at 11:00 a.m. EST (10:00 a.m. CST, 9:00 a.m. MST) to discuss Whiting’s fourth quarter and full-year 2007 financial and operating results. Please call (800) 573- 4840 (U.S./Canada) or (617) 224-4326 (International) and enter the pass code 75976916 to be connected to the call. Access to a live Internet broadcast will be available at http://www.whiting.com/ by clicking on the link titled “Webcasts.” Slides for the conference call will be available on this website beginning at 11:00 a.m. (EST) on February 28, 2008.

A telephonic replay will be available beginning approximately two hours after the call on Thursday, February 28, 2008 and continuing through Thursday, March 6, 2008. You may access this replay at (888) 286-8010 (U.S./Canada) or (617) 801-6888 (International) and entering the pass code 58461037. You may also access a web archive at http://www.whiting.com/ beginning approximately one hour after the conference call.

About Whiting Petroleum Corporation

Whiting Petroleum Corporation, a Delaware corporation, is an independent oil and gas company that acquires, exploits, develops and explores for crude oil, natural gas and natural gas liquids primarily in the Permian Basin, Rocky Mountains, Mid-Continent, Gulf Coast and Michigan regions of the United States. The Company trades publicly under the symbol WLL on the New York Stock Exchange. For further information, please visit http://www.whiting.com/.

Forward-Looking Statements

This news release contains statements that we believe to be “forward- looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. All statements other than historical facts, including, without limitation, statements regarding our future financial position, business strategy, projected revenues, earnings, costs, capital expenditures and debt levels, and plans and objectives of management for future operations, are forward-looking statements. When used in this news release, words such as we “expect,”"intend,”"plan,”"estimate,”"anticipate,”"believe” or “should” or the negative thereof or variations thereon or similar terminology are generally intended to identify forward-looking statements. Such forward- looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those expressed in, or implied by, such statements.

These risks and uncertainties include, but are not limited to: declines in oil or gas prices; our level of success in exploitation, exploration, development and production activities; adverse weather conditions that may negatively impact development or production activities; the timing of our exploration and development expenditures, including our ability to obtain drilling rigs and CO2; our ability to obtain external capital to finance acquisitions; our ability to identify and complete acquisitions and to successfully integrate acquired businesses, including our ability to realize cost savings from completed acquisitions; unforeseen underperformance of or liabilities associated with acquired properties; our ability to successfully complete our planned and potential asset dispositions; inaccuracies of our reserve estimates or our assumptions underlying them; failure of our properties to yield oil or gas in commercially viable quantities; uninsured or underinsured losses resulting from our oil and gas operations; our inability to access oil and gas markets due to market conditions or operational impediments; the impact and costs of compliance with laws and regulations governing our oil and gas operations; risks related to our level of indebtedness and periodic redeterminations of our borrowing base under our credit agreement; our ability to replace our oil and gas reserves; any loss of our senior management or technical personnel; competition in the oil and gas industry in the regions in which we operate; risks arising out of our hedging transactions and other risks described under the caption “Risk Factors” in our Form 10-K for the year ended December 31, 2007. We assume no obligation, and disclaim any duty, to update the forward-looking statements in this news release.

Information About Reserves

The SEC permits oil and gas companies to disclose in their filings with the SEC only proved reserves, which are reserve estimates that geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions. Whiting uses in this news release the terms “probable” and “possible” reserves, which SEC guidelines prohibit in filings of U.S. registrants. Probable reserves are unproved reserves that are more likely than not to be recoverable. Possible reserves are unproved reserves that are less likely to be recoverable than probable reserves. Estimates of probable and possible reserves which may potentially be recoverable through additional drilling or recovery techniques are by nature more uncertain than estimates of proved reserves and accordingly are subject to substantially greater risk of not actually being realized by the Company. In addition, Whiting’s production forecasts and expectations for future periods are dependent upon many assumptions, including estimates of production decline rates from existing wells and the undertaking and outcome of future drilling activity, which may be affected by significant commodity price declines or drilling cost increases.

SELECTED FINANCIAL DATA

For further information and discussion on the selected financial data below, please refer to Whiting Petroleum Corporation’s Annual Report on Form 10-K for the year ended December 31, 2007, to be filed with the Securities and Exchange Commission.

                       WHITING PETROLEUM CORPORATION                        CONSOLIDATED BALANCE SHEETS                               (In thousands)                                               December 31,      December 31,                                                 2007              2006   ASSETS    CURRENT ASSETS:     Cash and cash equivalents                 $14,778          $10,372     Accounts receivable trade, net            110,437           97,831     Deferred income taxes                      27,720            3,025     Prepaid expenses and other                  9,232           10,484       Total current assets                    162,167          121,712    PROPERTY AND EQUIPMENT:     Oil and gas properties, successful      efforts method:       Proved properties                     3,313,777        2,828,282       Unproved properties                      55,084           55,297     Other property and equipment               37,778           44,902        Total property and equipment          3,406,639        2,928,481      Less accumulated depreciation,      depletion and amortization              (646,943)        (495,820)    Total property and equipment, net         2,759,696        2,432,661    DEBT ISSUANCE COSTS                          15,016           19,352    OTHER LONG-TERM ASSETS                       15,132           11,678    TOTAL                                    $2,952,011       $2,585,403                          WHITING PETROLEUM CORPORATION                        CONSOLIDATED BALANCE SHEETS              (In thousands, except share and per share data)                                                 December 31,    December 31,                                                   2007            2006   LIABILITIES AND STOCKHOLDERS’ EQUITY    CURRENT LIABILITIES:     Accounts payable                             $19,280         $21,077     Accrued capital expenditures                  59,441          28,127     Accrued liabilities                           29,098          30,377     Accrued interest                              11,240           9,124     Oil and gas sales payable                     26,205          19,064     Accrued employee compensation and benefits    21,081          17,800     Production taxes payable                      12,936           9,820     Current portion of tax sharing liability       2,587           3,565     Current portion of derivative liability       72,796           4,088        Total current liabilities                  254,664         143,042    NON-CURRENT LIABILITIES:     Long-term debt                               868,248         995,396     Asset retirement obligations                  35,883          36,982     Production Participation Plan liability       34,042          25,443     Tax sharing liability                         23,070          23,607     Deferred income taxes                        242,964         165,031     Long-term derivative liability                     –           5,248     Other long-term liabilities                    2,314           3,984        Total non-current liabilities            1,206,521       1,255,691    COMMITMENTS AND CONTINGENCIES    STOCKHOLDERS’ EQUITY:     Common stock, $0.001 par value; 75,000,000      shares authorized, 42,480,497 and      36,947,681 shares issued and outstanding      as of December 31, 2007 and      December 31, 2006, respectively                  42              37     Additional paid-in capital                   968,876         754,788     Accumulated other comprehensive loss         (46,116)         (5,902)     Retained earnings                            568,024         437,747        Total stockholders’ equity               1,490,826       1,186,670    TOTAL                                       $2,952,011      $2,585,403                          WHITING PETROLEUM CORPORATION                     CONSOLIDATED STATEMENTS OF INCOME                   (In thousands, except per share data)                                      Three Months Ended      Year Ended                                        December 31,        December 31,                                       2007      2006       2007     2006   REVENUES AND OTHER INCOME:     Oil and gas sales               $251,063  $171,861   $809,017 $773,120     Gain (loss) on oil and natural      gas hedging activities          (19,088)    2,358    (21,189)  (7,501)     Gain on sale of properties             –    12,092     29,682   12,092     Interest income and other            388       280      1,208    1,116       Total revenues and        other income                  232,363   186,591    818,718  778,827    COSTS AND EXPENSES:     Lease operating                   54,354    48,405    208,866  183,642     Production taxes                  17,519    10,276     52,407   47,095     Depreciation, depletion and      amortization                     49,597    45,884    192,811  162,831     Exploration and impairment        11,084    11,631     37,323   34,534     General and administrative        11,105     8,523     39,046   37,808     Change in Production      Participation Plan liability      2,195       214      8,599    6,156     Interest expense                  15,990    19,011     72,504   73,489     Unrealized derivative loss        (1,178)        –          –        –       Total costs and expenses       160,666   143,944    611,556  545,555    INCOME BEFORE INCOME TAXES          71,697    42,647    207,162  233,272    INCOME TAX EXPENSE:     Current                           (4,992)   11,809        550   12,346     Deferred                          30,939     2,888     76,012   64,562       Total income tax expense        25,947    14,697     76,562   76,908    NET INCOME                         $45,750   $27,950   $130,600 $156,364    NET INCOME PER COMMON SHARE,    BASIC                               $1.08     $0.76      $3.31    $4.26    NET INCOME PER COMMON SHARE,    DILUTED                             $1.08     $0.76      $3.29    $4.25    WEIGHTED AVERAGE SHARES    OUTSTANDING,    BASIC                               42,237    36,744     39,483   36,736    WEIGHTED AVERAGE SHARES    OUTSTANDING,    DILUTED                             42,388    36,860     39,645   36,826                          WHITING PETROLEUM CORPORATION  

Reconciliation of Net Cash Provided by Operating Activities to Discretionary

                                 Cash Flow                               (In thousands)                                                        Three Months Ended                                                           December 31,                                                        2007         2006    Net cash provided by operating activities          $121,423      $59,329   Exploration                                           8,263        8,918   Changes in working capital                           10,208       15,575   Discretionary cash flow (1)                        $139,894      $83,822                                                               Year Ended                                                          December 31,                                                        2007         2007    Net cash provided by operating activities          $394,032     $411,209   Exploration                                          27,344       30,079   Changes in working capital                              785      (15,087)   Discretionary cash flow (1)                        $422,161     $426,201    (1) Discretionary cash flow is computed as net income plus exploration and       impairment costs, depreciation, depletion and amortization, deferred       income taxes, non-cash interest costs, non-cash compensation plan       charges, unrealized derivative losses and other non-current items less       the gain on sale of properties and marketable securities.  The       non-GAAP measure of discretionary cash flow is presented because       management believes it provides useful information to investors for       analysis of the Company’s ability to internally fund acquisitions,       exploration and development.  Discretionary cash flow should not be       considered in isolation or as a substitute for net income, income from       operations, net cash provided by operating activities or other income,       cash flow or liquidity measures under GAAP and may not be comparable       to other similarly titled measures of other companies.                                    Proved Reserves                   December                                                                 2007 Average                           Natural                     Pre-Tax      Daily                    Oil      Gas    Total               PV10%      Production   Core Area      (MMbbl)   (Bcf)  (MMBOE)   % Oil   Value (1)(3)  (MBOE/d)                                                    (In millions)    Permian Basin    100.7     76.0   113.4     89 %   $2,483.0         10.7   Rocky Mountains   42.2    116.9    61.7     68 %    1,418.0         14.8   Mid-Continent     46.0     30.6    51.1     90 %    1,418.0          4.1   Gulf Coast         3.5     52.5    12.3     29 %      284.7          7.2   Michigan           3.9     50.7    12.3     32 %      254.6          3.5         Total        196.3    326.7   250.8     78 %   $5,858.3 (2)(3)  40.3   Discounted Future    Income Taxes        –        –       –       –    (1,846.6)           –   Standardized    Measure    of Discounted    Future Net Cash    Flows               –        –       –       –    $4,011.7 (2)(3)     –     (1) Pre-tax PV10% may be considered a non-GAAP financial measure as       defined by the SEC and is derived from the standardized measure of       discounted future net cash flows, which is the most directly       comparable GAAP financial measure.  Pre-tax PV10% is computed on the       same basis as the standardized measure of discounted future net cash       flows but without deducting future income taxes.  We believe pre-tax       PV10% is a useful measure for investors for evaluating the relative       monetary significance of our oil and natural gas properties.  We       further believe investors may utilize our pre-tax PV10% as a basis for       comparison of the relative size and value of our reserves to other       companies because many factors that are unique to each individual       company impact the amount of future income taxes to be paid.  Our       management uses this measure when assessing the potential return on       investment related to our oil and gas properties and acquisitions.       However, pre-tax PV10% is not a substitute for the standardized       measure of discounted future net cash flows.  Our pre-tax PV10% and       the standardized measure of discounted future net cash flows do not       purport to present the fair value of our oil and natural gas reserves.    (2) At year-end 2006, these values were $3,352.2 million and       $2,392.2 million, respectively, based on December 31, 2006 prices:       NYMEX $61.05/Bbl and $5.52/MMbtu.    (3) Based on December 31, 2007 prices: NYMEX $96.00/Bbl and $7.10/MMbtu.  

Whiting Petroleum Corporation

CONTACT: John B. Kelso, Director of Investor Relations of WhitingPetroleum Corporation, +1-303-837-1661, john.kelso@whiting.com

Web site: http://www.whiting.com/