EXHIBIT 10.22 STUSCO Purchase Contract No. LPS690012 February 1, 2006 Dated: June 19, 2001 Amendment No: 007 Page 1 of 2 RWG Contract No: EXHIBIT A RWG Energy Contract: Rachel Tarantola STUSCO Contract: Terry Allison Phone: 915-632-0647 Phone: 817-799-0104 ITEM(S) AMENDED: Attachment Lease Number Effective Date Number Lease Name Operator Action ------ -------------- ------ ---------- -------- ------ 1 1/1/2006 Various WG Energy Effective 01-01-06 price change. See attachments 1A & 1B RWG Energy's Sale and Delivery to STUSCO: Quality: North Texas sweet type crude oil. Quantity: 1. Equal to production purchased by STUSCO from leases listed on Attachment #1A. 2. Equal to production purchased by STUSCO from leases listed on Attachment #1B. Delivery: 1. At header of leases on Attachment 1A, into crude oil transports designated by STUSCO. 2. From the leases listed on Attachment 1B into TEPPCO pipeline. Price: 1. Koch's WTI posting plus Platt's Trade-month P+ minus $1.20/bbl. 2. Koch's WTI posting plus Platt's Trade-month P+ minus $1.20/bbl. Payment: 1. Due on or before the 20th of the month following month of delivery. TERM 1. For the term of November 1, 2000 through December 31, 2005 and month to month thereafter until the 1st of the month following either party's 30 days written notice of termination. 2. For the term of August 1, 2000 through December 31, 2005, and month to month thereafter, until the 1st of the month following either party's 30 days written notice of termination. SPECIAL PROVISIONS: If there is an increase in the transportation costs incurred by STUSCO to move the crude received under this agreement to market, STUSCO may adjust the price deductions to compensate for the transportation cost changes. If there is a material decline in the quality of crude received under this agreement to market, STUSCO may adjust the price deductions to compensate for the quality change. ASSIGNMENT: The Contract shall extend to and be binding upon the successors and assigns of the Parties, but neither this Contract nor any part, specifically including the right to receive payment, shall be assigned or transferred by either party or by law without the prior written consent of the other Party, which shall not be unreasonably withheld, and any assignment or transfer made by either Party without the other Party's written consent need not be recognized by and shall not be binding upon the other Party. STUSCO Purchase Contract No. LPS690012 February 1, 2006 Dated: June 19, 2001 Amendment No: 007 Page 2 of 2 RWG Contract No: LIMITATION OF LIABILITY: Neither party shall be liable for indirect, special, or consequential damages. SHELL TRADING (US) CO CUSTOMER NAME RWG ENERGY ATTACHMENT 1A STUSCO\CUSTOVERCONTRACLPS690012 ADMENDMENT REVISED 2/1/2006 - ------------------------------------------------------------------------------------------------------------------------------------ CUSTOMER LEASE RRC# PROPERTY NAME COUNTY STATE LEASE PRICE PLUS/LESS DECIMAL NUMBER NUMBER OPERATOR BASIS BBL INTEREST - ------------------------------------------------------------------------------------------------------------------------------------ 2928 171151 TARRANT B 7 JACK TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2928 29658 TARRANT B 10 JACK TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2929 17152 ASHE A & 5 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2934 17153 ASHE BCDE 8, C 11 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2940 131225 DAVENPORT A 4 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2944 24918 DAVEM[PRT B 5 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2945 151550 HALMAN-SMITH A 1 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2947 29688 SEALY B WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2948 143051 SEALY C 2 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2949 154720 SEALY C J WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2950 17340 SLAY A WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2952 115885 TARRANT E 2 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2954 130222 TARRANT E 5 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2955 174843 TARRANT E 7 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2983 29573 TARRANT A 7 JACK TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2984 171171 TARRANT A 8 JACK TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 2965 29767 TARRANT A 10 JACK TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 51 135820 TARRANT B 4 JACK TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 55 10034 CHICO CONGLOMERATE UNIT WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 4050 118760 TARRANT E 8 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 5208 24913 DAVENPORT B 5 WILLIAMSON TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 52617 10334 WEST CHICIO UNIT 711 WISE TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 SHELL TRADING (US) CO CUSTOMER NAME RWG ENERGY ATTACHMENT 1B STUSCO\CUSTOVERCONTRACLPS690012 ADMENDMENT REVISED 2/1/2006 - ------------------------------------------------------------------------------------------------------------------------------- CUSTOMER LEASE RRC# PROPERTY NAME COUNTY STATE LEASE PRICE PLUS/LESS DECIMAL NUMBER NUMBER OPERATOR BASIS BBL INTEREST - ------------------------------------------------------------------------------------------------------------------------------- 3085 09635 SMA UNIT "8" WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3084 05387 WM. THOM UNIT WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3088 25755 R.S. ALLEN WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3089 25754 RED RIVER ALLEN WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3090 25755 BROWN & CROSS WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3091 25757 B.A.BYWATERS WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3092 05308 CORSICANA HONAXER WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3093 05307 R.R. HAMILTON WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3094 28780 S.E. HONAKER WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3095 28761 C.M. JPUTNAM WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3096 28762 RIO BRAVO WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3098 22331 H&TC WILLBARGER TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3099 22332 W.R. PIPER WILLBARGER TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3100 22333 FRANCIS SUMNER WILLBARGER TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3103 05858 SECOND BYWATER WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3106 05883 GEORGE S. SKINNER WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3107 05585 J.W. STRINGER WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3108 13394 W.T. WAGGONER A NCT 3 WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 3390 13380 W.B. HONAXER NCT 1 WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 4512 05380 HUGH REILLY WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 4513 25445 REILLY HEIRS WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 4514 05388 W.W. VILES WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 4515 09008 ELECTRA GAS PLANT WILLBARGER TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 5207 05338 OWEN M J WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 48001 05858 BYWATERS LACT UNIT WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 48013 05898 BICKLEY LACT UNIT WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000 48089 13351 W.B. HONAXER NCT 2 WICHITA TX WG ENERGY HOLDINGS KPP -1.2000 1.0000000