WTI 10-Q Quarter ended June 30, 2012

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Form 10-Q

For the quarterly period ended June 30, 2012

OR

For the transition period from              to

Commission File Number 1-32414

W&T OFFSHORE, INC.

(Exact name of registrant as specified in its charter)

(713) 626-8525

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.    Yes þ No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes þ No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company.    Yes ¨ No þ

As of July 27, 2012, there were 74,373,487 shares outstanding of the registrant’s common stock, par value $0.00001.

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W&T OFFSHORE, INC. AND SUBSIDIARIES

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W&T OFFSHORE, INC. AND SUBSIDIARIES

See Notes to Condensed Consolidated Financial Statements.

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See Notes to Condensed Consolidated Financial Statements.

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CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS’ EQUITY

See Notes to Condensed Consolidated Financial Statements.

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See Notes to Condensed Consolidated Financial Statements.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Basis of Presentation

Operations. W&T Offshore, Inc. and subsidiaries, referred to herein as “W&T” or the “Company,” is an independent oil and natural gas producer focused primarily in the Gulf of Mexico and onshore Texas. The Company is active in the acquisition, exploration and development of oil and natural gas properties.

Interim Financial Statements. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the appropriate rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, the condensed consolidated financial statements do not include all of the information and footnote disclosures required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.

Operating results for interim periods are not necessarily indicative of the results that may be expected for the entire year. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011.

Reclassifications. Certain reclassifications have been made to the prior periods’ financial statements to conform to the current presentation.

Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from those estimates.

2. Acquisitions and Divestitures

2012 Acquisitions. There were no material acquisitions completed during the six months ended June 30, 2012.

2012 Divestitures . On May 15, 2012, we sold our 40%, non-operating working interest in the South Timbalier 41 field located in the Gulf of Mexico for $30.5 million with an effective date of April 1, 2012. The transaction was structured as a like-kind exchange under the Internal Revenue Service Code (“IRC”) Section 1031 and other applicable regulations, with funds held by a qualified intermediary until a replacement purchase is executed. Funds from this sale are included in current assets as restricted cash and cash equivalents on the balance sheet as of June 30, 2012. In connection with this sale, we reversed $4.0 million of asset retirement obligations (“ARO”).

2011 Acquisitions. On May 11, 2011, we completed the acquisition of approximately 24,500 gross acres (21,900 net acres) of oil and gas leasehold interests in the West Texas Permian Basin from Opal Resources LLC and Opal Resources Operating Company LLC (collectively, “Opal”) and, in 2011, we acquired minor amounts of undeveloped leasehold acreage in the related geography from another third party (collectively, with the properties acquired from Opal, the “Yellow Rose Properties”). The acquisitions were funded from cash on hand and borrowings under our revolving bank credit facility.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

The following table presents the purchase price allocation for the acquisitions of the Yellow Rose Properties (in thousands):

On August 10, 2011, we completed the acquisition from Shell Offshore Inc. (“Shell”) of its 64.3% interest in the Fairway Field along with a like interest in the associated Yellowhammer gas treatment plant (collectively, the “Fairway Properties”). During the six months ended June 30, 2012, the purchase price was reduced by $3.7 million. The purchase price is subject to further post-effective date adjustments and final settlement is expected to occur in the third quarter of 2012. The acquisition was funded from borrowings under our revolving bank credit facility.

The following table presents the purchase price allocation for the acquisition of the Fairway Properties (in thousands):

2011 Divestitures. There were no divestitures completed during the six months ended June 30, 2011.

3. Hurricane Remediation and Insurance Claims

During the third quarter of 2008, Hurricane Ike caused substantial property damage and we continue to incur costs and submit claims to our insurance underwriters related to repairing such damage. Our insurance policies in effect on the occurrence date of Hurricane Ike had a retention requirement of $10.0 million per occurrence, which has been satisfied, and coverage policy limits of $150.0 million for property damage due to named windstorms (excluding damage at certain facilities) and $250.0 million for, among other things, removal of wreckage if mandated by any governmental authority.

We recognize insurance receivables with respect to capital, repair and plugging and abandonment costs as a result of hurricane damage when we deem those to be probable of collection, which arises when our insurance underwriters’ adjuster reviews and approves such costs for payment by the underwriters. Claims that have been processed in this manner have customarily been paid on a timely basis. See Note 4 for additional information about the impact of hurricane related items on our asset retirement obligations.

From the third quarter of 2008 through June 30, 2012, we have received $140.0 million from our insurance underwriters related to Hurricane Ike. To the extent additional remediation costs or plug and abandonment costs are incurred that are not covered by insurance, we expect that our available cash and cash equivalents, cash flow from operations and the availability under our revolving bank credit facility will be sufficient to meet necessary expenditures that may exceed our insurance coverage for damages incurred as a result of Hurricane Ike.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

4. Asset Retirement Obligations

Our ARO represent the estimated present value of the amount we will incur to plug, abandon and remediate our producing properties at the end of their productive lives in accordance with applicable laws. A summary of the changes to our ARO is as follows (in thousands):

5. Derivative Financial Instruments

Our market risk exposure relates primarily to commodity prices and interest rates. From time to time, we use various derivative instruments to manage our exposure to commodity price risk from sales of oil and natural gas and interest rate risk from floating interest rates on our revolving bank credit facility. We do not enter into derivative instruments for speculative trading purposes. Our derivative instruments currently consist of crude oil swap and option contracts. We are exposed to credit loss in the event of nonperformance by the counterparties (Natixis; ING Capital Markets, LLC-EDP; the Toronto Dominion Bank; and Wells Fargo Bank, N.A.); however, we do not currently anticipate any of our counterparties being unable to fulfill their contractual obligations.

We account for derivative contracts in accordance with GAAP, which requires each derivative to be recorded on the balance sheet as an asset or a liability at its fair value. Changes in a derivative’s fair value are required to be recognized currently in earnings unless specific hedge accounting criteria are met at the time we enter into a derivative contract. We have elected not to designate our commodity derivatives as hedging instruments. For additional information about fair value measurements, refer to Note 7.

Commodity Derivatives. We have entered into commodity option contracts to manage a portion of our exposure to commodity price risk from sales of oil through December 2014. While these contracts are intended to reduce the effects of price volatility, they may also limit future income from favorable price movements. During the six months ended June 30, 2012 and 2011, our derivative contracts consisted entirely of crude oil contracts. The zero cost collars are priced off the West Texas Intermediate crude oil price quoted on the New York Mercantile Exchange, known as NYMEX, and the swaps are priced off the Brent crude oil price quoted on the IntercontinentalExchange, known as ICE.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

As of June 30, 2012, our open commodity derivatives were as follows:

The following balance sheet line items included amounts related to the estimated fair value of our derivative contracts as indicated in the following table (in thousands):

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

Changes in the fair value of our derivative contracts are recognized currently in earnings and were as follows (in thousands):

At June 30, 2012 and December 31, 2011, the balance outstanding of our senior notes, which bear an annual interest rate of 8.50% and mature on June 15, 2019 (the “8.50% Senior Notes”), was $600.0 million and was classified as long-term at their carrying value. Interest on the 8.50% Senior Notes is payable semi-annually in arrears on June 15 and December 15. The estimated annual effective interest rate on the 8.50% Senior Notes is 8.6%. We are subject to various financial and other covenants under the indenture governing the 8.50% Senior Notes and we were in compliance with those covenants as of June 30, 2012.

The Fourth Amended and Restated Credit Agreement (the “Credit Agreement”) governs our revolving bank credit facility and terminates on May 5, 2015. Borrowings under our revolving bank credit facility are secured by our oil and natural gas properties. Availability under such facility is subject to a semi-annual redetermination of our borrowing base that occurs in the spring and fall of each year and is calculated by our lenders based on their evaluation of our proved reserves and their own internal criteria.

On May 7, 2012, we executed the First Amendment to the Fourth Amended and Restated Credit Agreement (the “Amendment”), which, among other things, increased the number of participating lenders, increased the borrowing base from $575.0 million to $650.0 million and added a provision permitting the Company to maintain security interests in favor of any hedging counterparties that cease to be lenders under the Company’s revolving bank credit facility. All other terms of the Credit Agreement remain substantially the same prior to the Amendment.

At June 30, 2012 and December 31, 2011, we had $80.0 million and $117.0 million, respectively, of loans outstanding and $0.6 million and $0.4 million, respectively, of letters of credit outstanding under the revolving bank credit facility. The outstanding balance under the revolving credit facility was classified as long-term at the carrying value. The estimated annual effective interest rate was 4.5% for borrowings under the revolving bank credit facility for the six months ended June 30, 2012. The estimated annual effective interest rate includes amortization of debt issuance costs and excludes commitment fees and other costs. As of June 30, 2012, our borrowing base was $650.0 million and our borrowing capacity availability was $569.4 million.

Under the Credit Agreement, we are subject to two financial covenants calculated as of the last day of each fiscal quarter, comprised of a minimum current ratio and a maximum leverage ratio, each as defined in the Credit Agreement. We were in compliance with all applicable covenants of the Credit Agreement as of June 30, 2012.

For information about fair value measurements for our 8.50% Senior Notes and revolving bank credit facility, refer to Note 7.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

7. Fair Value Measurements

We measure the fair value of our derivative financial instruments by applying the income approach, using models with inputs that are classified within Level 2 of the valuation hierarchy. The inputs used for the fair value measurement of our derivative financial instruments are the exercise price, the expiration date, the settlement date, notional quantities, the implied volatility, the discount curve with spreads and published commodity futures prices. The fair value of our 8.50% Senior Notes is based on quoted prices and the market is not an active market; therefore, the fair value is classified within Level 2. The carrying amount of debt under our revolving bank credit facility approximates fair value because the interest rates are variable and reflective of market rates.

The following table presents the fair value of our derivative financial instruments, 8.50% Senior Notes and revolving bank credit facility for the periods indicated (in thousands).

As described in Note 5, our derivative financial instruments are reported in the balance sheet at fair value and changes in fair value are recognized currently in earnings. The 8.50% Senior Notes and revolving bank credit facility are reported in the balance sheet at their carrying value as described in Note 6.

8. Share-Based Compensation and Cash-Based Incentive Compensation

In 2010, the W&T Offshore, Inc. Amended and Restated Incentive Compensation Plan (the “Plan”) was approved by our shareholders. As allowed by the Plan, in 2012 and in prior years, the Company granted restricted stock units (“RSUs”) to certain of its employees and in January 2011, the Company granted restricted stock to one of its employees. RSUs are a long-term compensation component of the Plan, which are granted to only certain employees, and are subject to adjustments at the end of the applicable performance period based on the achievement of certain predetermined criteria. In 2012 and in prior years, restricted stock was granted to the Company’s non-employee directors under the Director Compensation Plan. The restricted stock and RSUs vest at the end of a specified service period. In addition to share-based compensation, the Company may grant its employees cash-based incentive awards, which are a short-term component of the Plan, and are based on the Company and the employee achieving certain predetermined performance criteria.

We recognize compensation cost for share-based payments to employees and non-employee directors over the period during which the recipient is required to provide service in exchange for the award, based on the fair value of the equity instrument on the date of grant. We are also required to estimate forfeitures, resulting in the recognition of compensation cost only for those awards that are expected to actually vest.

At June 30, 2012, there were 2,269,745 shares of common stock available for issuance in satisfaction of awards under the Plan and 546,829 shares of common stock available for issuance in satisfaction of awards under the Director Compensation Plan. The shares available for both plans are reduced when restricted stock is granted. RSUs will reduce the shares available in the Plan only if RSUs are settled in shares of common stock. The Company has the option to settle RSUs in stock or cash at vesting.

Restricted Stock . The Company currently has unvested restricted shares outstanding issued to the non-employee directors and one employee. Restricted shares are subject to forfeiture until vested and cannot be sold, transferred or disposed of during the restricted period. The holders of restricted shares generally have the same rights as a shareholder of the Company with respect to such shares, including the right to vote and receive dividends or other distributions paid with respect to the shares.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

A summary of activity related to restricted stock is as follows:

The grant date fair value of restricted shares granted during the six months ended June 30, 2012 and 2011 was $0.4 million and $0.5 million, respectively. The fair value of restricted shares that vested during the six months ended June 30, 2012 and 2011 was $0.5 million and $0.6 million, respectively.

Restricted Stock Units. During 2012, the Company awarded to certain employees RSUs that were 100% contingent upon meeting specified performance requirements, with 70% of the award conditioned on achieving earnings per share targets for the year 2012, 10% of the award conditioned on achieving total shareholder return (“TSR”) targets for the year 2012, 10% of the award conditioned on achieving TSR targets for the year 2013 and 10% of the award conditioned on achieving TSR targets for the period January 1, 2014 to October 31, 2014 (collectively, the “2012 RSUs”). TSR is determined based upon the change in the entity’s stock price and dividends for the performance period. The TSR targets are the ranking of the Company’s TSR compared to the TSR of 19 peer companies. The 2012 RSUs related to the earnings per share targets have an issuance scale from 0% to 100%. The 2012 RSUs related to TSR targets have an issuance scale from 0% to 150%. Subject to achieving the predetermined performance criteria and the service condition, vesting for the 2012 RSUs occurs on December 15, 2014.

The fair value at the date of grant for the 2012 RSUs was determined separately for the component related to the earnings per share targets and the component related to TSR targets. The fair value of the component related to earnings per share targets was determined using the Company’s closing price on the grant date and a forecast of earnings per share for 2012 to estimate the number of shares eligible for vesting. The fair value for the component related to TSR targets was determined by using a Monte Carlo simulation probabilistic model. The inputs used in the probabilistic model for the Company and the peer companies were: average closing stock prices during January 2012; risk-free interest rates using the London Interbank Offered Rate (“LIBOR”) Zero ranging from .15% to .72% over the service period; expected volatilities ranging from 33% to 74%; expected dividend yields ranging from 0.0% to 2.5%; and correlation factors ranging from (67%) to 94%. The expected volatilities, expected dividends and correlation factors were developed using historical data.

During 2010 and 2011, the Company awarded to certain employees RSUs that were 100% contingent upon meeting specified performance requirements, which were achieved for both awards. Subject to satisfaction of the service condition, vesting will occur on December 15, 2012 and December 15, 2013, respectively.

All RSUs awarded are subject to forfeiture until vested and cannot be sold, transferred or otherwise disposed of during the restricted period. Dividend equivalents are earned at the same rate as dividends paid on our common stock and are earned after achieving the specified performance requirement for that component of the RSUs.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

A summary of activity related to RSUs is as follows:

During the six months ended June 30, 2011, there were no grants or vesting of RSUs.

Share-Based Compensation. A summary of incentive compensation expense under share-based payment arrangements and the related tax benefit is as follows (in thousands):

As of June 30, 2012, unrecognized share-based compensation expense related to our outstanding restricted shares and RSUs was $0.8 million and $16.7 million, respectively. Unrecognized compensation expense will be recognized through April 2015 for restricted shares and November 2014 for RSUs.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

Cash-based Incentive Compensation. As defined by the Plan, annual incentive awards may be granted to eligible employees payable in cash. These awards are performance-based awards consisting of one or more business criteria or individual performance criteria and a targeted level or levels of performance with respect to each of such criteria. Generally, the performance period is the calendar year and determination and payment is made in cash in the first quarter of the following year.

Share-Based Compensation and Cash-Based Incentive Compensation Expense. A summary of incentive compensation expense is as follows (in thousands):

9. Income Taxes

Income tax expense of $34.2 million and $36.1 million was recorded during the three and six months ended June 30, 2012, respectively. Our effective tax rate for the three and six months ended June 30, 2012 was 38.9% for both periods, and differed from the federal statutory rate of 35.0% primarily as a result of the recapture of deductions for qualified domestic production activities under Section 199 of the IRC as a function of loss carrybacks to prior years. Income tax expense of $29.8 million and $40.0 million was recorded during the three and six months ended June 30, 2011, respectively. Our effective tax rate for the three and six months ended June 30, 2011 was 35.1% and 35.2%, respectively, which approximated the federal statutory rate.

As of June 30, 2012 and December 31, 2011, we did not have any unrecognized tax benefit recorded. As of June 30, 2012 and December 31, 2011, we had a valuation allowance related to state net operating losses. The realization of these assets depends on recognition of sufficient future taxable income in specific tax jurisdictions in which those temporary differences or net operating losses are deductible. The tax years from 2008 through 2011 remain open to examination by the tax jurisdictions to which we are subject.

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS – (Continued)

(Unaudited)

10. Earnings Per Share

The following table presents the calculation of basic and diluted earnings per common share (in thousands, except per share amounts):