UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 13, 2009

CHAPARRAL ENERGY, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (405) 478-8770

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

ADDITIONAL INFORMATION AND FORWARD-LOOKING STATEMENTS

CHAPARRAL ENERGY, INC. (“CHAPARRAL”) AND UNITED REFINING ENERGY CORP. (“UNITED”) CLAIM THE PROTECTION OF THE SAFE HARBOR FOR “FORWARD-LOOKING STATEMENTS” WITHIN THE MEANING OF THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995. FORWARD-LOOKING STATEMENTS ARE STATEMENTS THAT ARE NOT HISTORICAL FACTS. SUCH FORWARD-LOOKING STATEMENTS, BASED UPON THE CURRENT BELIEFS AND EXPECTATIONS OF MANAGEMENT OF CHAPARRAL AND UNITED REGARDING, AMONG OTHER THINGS, CHAPARRAL’S PROPOSED BUSINESS COMBINATION WITH UNITED DISCUSSED HEREIN AND THE BUSINESS OF CHAPARRAL, ARE SUBJECT TO RISKS AND UNCERTAINTIES, WHICH COULD CAUSE ACTUAL RESULTS TO DIFFER FROM THE FORWARD-LOOKING STATEMENTS. THE FOLLOWING FACTORS, AMONG OTHERS, COULD CAUSE ACTUAL RESULTS TO DIFFER FROM THOSE SET FORTH IN THE FORWARD-LOOKING STATEMENTS: CHANGING INTERPRETATIONS OF GENERALLY ACCEPTED ACCOUNTING PRINCIPLES; CONTINUED COMPLIANCE WITH GOVERNMENT REGULATIONS; CHANGING LEGISLATION OR REGULATORY ENVIRONMENTS; REQUIREMENTS OR CHANGES AFFECTING THE BUSINESS IN WHICH CHAPARRAL IS, AND UNITED WILL BE, ENGAGED; MANAGEMENT OF GROWTH; INTENSITY OF COMPETITION; GENERAL ECONOMIC CONDITIONS; AS WELL AS OTHER RELEVANT RISKS DETAILED IN CHAPARRAL’S FILINGS WITH THE SECURITIES AND EXCHANGE COMMISSION (“SEC”) IN CONNECTION WITH THE PROPOSED BUSINESS COMBINATION. THE INFORMATION SET FORTH HEREIN SHOULD BE READ IN LIGHT OF SUCH RISKS. NEITHER CHAPARRAL NOR UNITED ASSUMES ANY OBLIGATION TO UPDATE THE INFORMATION CONTAINED IN THIS REPORT.

COMMENCING SHORTLY AFTER THE FILING OF THIS CURRENT REPORT ON FORM 8-K, UNITED INTENDS TO HOLD PRESENTATIONS FOR CERTAIN OF ITS SECURITYHOLDERS, AS WELL AS OTHER PERSONS WHO MIGHT BE INTERESTED IN PURCHASING UNITED’S SECURITIES, REGARDING ITS PROPOSED BUSINESS COMBINATION WITH CHAPARRAL, AS DESCRIBED IN THIS CURRENT REPORT. THIS CURRENT REPORT WILL BE DISTRIBUTED TO PARTICIPANTS AT SUCH PRESENTATIONS.

CHAPARRAL AND UNITED AND THEIR RESPECTIVE DIRECTORS AND EXECUTIVE OFFICERS MAY BE DEEMED TO BE PARTICIPANTS IN THE SOLICITATION OF PROXIES FOR THE SPECIAL MEETINGS OF UNITED’S STOCKHOLDERS TO BE HELD TO APPROVE THE PROPOSED TRANSACTIONS. CERTAIN INVESTMENT BANKERS MAY PROVIDE ASSISTANCE TO CHAPARRAL, UNITED AND THEIR RESPECTIVE DIRECTORS AND EXECUTIVE OFFICERS, AND MAY BE DEEMED TO BE PARTICIPANTS IN THE SOLICITATION OF PROXIES. A SUBSTANTIAL PORTION OF THE UNDERWRITERS’ FEES RELATING TO UNITED’S INITIAL PUBLIC OFFERING WERE DEFERRED PENDING STOCKHOLDER APPROVAL OF UNITED’S INITIAL BUSINESS COMBINATION, AND STOCKHOLDERS ARE ADVISED THAT THE UNDERWRITERS HAVE A FINANCIAL INTEREST IN THE SUCCESSFUL OUTCOME OF THE PROXY SOLICITATION. INFORMATION ABOUT CHAPARRAL AND UNITED’S DIRECTORS AND EXECUTIVE OFFICERS IS AVAILABLE IN THE PROXY STATEMENT. ADDITIONAL INFORMATION REGARDING THE INTERESTS OF POTENTIAL PARTICIPANTS IS ALSO INCLUDED IN THE PROXY STATEMENT FILED BY UNITED WITH THE SEC.

THE INFORMATION ON CHAPARRAL’S WEBSITE IS NOT, AND SHALL NOT BE DEEMED TO BE, A PART OF THIS CURRENT REPORT OR INCORPORATED IN FILINGS CHAPARRAL MAKES WITH THE SEC.

THIS COMMUNICATION SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY ANY SECURITIES, NOR SHALL THERE BE ANY SALE OF SECURITIES IN ANY JURISDICTIONS IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH JURISDICTION. NO OFFERING OF SECURITIES SHALL BE MADE EXCEPT BY MEANS OF A PROSPECTUS MEETING THE REQUIREMENTS OF SECTION 10 OF THE SECURITIES ACT OF 1933, AS AMENDED.

On October 9, 2009, Chaparral Energy, Inc., a privately owned Delaware corporation (“Chaparral”), United Refining Energy Corp., a Delaware corporation (“United”) and Chaparral Subsidiary, Inc., a newly formed Delaware corporation and wholly-owned subsidiary of United (“Merger Sub”), entered into an Agreement and Plan of Reorganization (the “Merger Agreement”). Pursuant to the terms of the Merger Agreement, the Merger Sub will merge with and into Chaparral, with Chaparral surviving as a wholly-owned subsidiary of United, and the Chaparral stockholders will be issued shares of United common stock (the “Transaction”).

Attached as Exhibit 99.1 to this Current Report is the form of presentation United expects to use in connection with presentations to certain of its securityholders, as well as other persons interested in purchasing securities of United, in connection with the Transaction. Such material may be deemed soliciting material in connection with the special meeting of United’s stockholders to be held pursuant to the Merger Agreement.

Note Regarding Non-GAAP Financial Measures

The investor presentation attached as an exhibit hereto contains certain references to EBITDA, which is a non-GAAP financial measure, as defined under Regulation G of the rules and regulations of the SEC. Chaparral defines EBITDA as net income (loss), adjusted to exclude (1) interest and other financing costs, net of capitalized interest, (2) income taxes, (3) depreciation, depletion and amortization, (4) unrealized (gain) loss on ineffective portion of hedges and reclassification adjustments, (5) non-cash change in fair value of non-hedge derivative instruments, (6) interest income, (7) non-cash deferred compensation expense (gain), (8) gain or loss on disposed assets, and (9) impairment charges and other significant, unusual non-cash charges. Any cash proceeds received from the monetization of derivatives with a scheduled maturity date more than 12 months following the date of such monetization are excluded from the calculation of EBITDA.

Chaparral’s management uses EBITDA as a supplemental financial measurement to evaluate Chaparral’s operational trends. Items excluded generally represent non-cash adjustments, the timing and amount of which cannot be reasonably estimated and are not considered by management when measuring Chaparral’s overall operating performance. In addition, EBITDA is the financial measurement that is used in covenant calculations required under Chaparral’s existing secured credit facility and is expected to be used in covenant calculations required under Chaparral’s new secured credit facility. Chaparral considers compliance with the liquidity and debt covenants included in these agreements to be material. EBITDA is used as a supplemental financial measurement in the evaluation of Chaparral’s business and should not be considered as an alternative to net income, as an indicator of its operating performance, as an alternative

to cash flows from operating activities, or as a measure of liquidity. EBITDA is not defined under GAAP and, accordingly, it may not be a comparable measurement to those used by other companies.

A reconciliation of net income (loss) to Adjusted EBITDA for the year ended December 31, 2008 can be found in the Preliminary Proxy Statement of United Refining Energy Corp. filed with the SEC on October 13, 2009 under the heading “Chaparral’s Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non GAAP Financial Measures and Reconciliations”, and such reconciliation is incorporated herein by reference. EBITDA in the investor presentation is calculated in the same manner as Adjusted EBITDA in United’s Preliminary Proxy Statement.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit Index