BRINKLEY "A"

Oil · District 7B · Lease #4263

Operator: WALSH & WATTS, INC.

Cum Oil

303k BBL

Cum Gas

190k MCF

casinghead

Wells

52

Production

1993-01 — 2026-04

Peak Month

2011-07

Production History

Cum Oil: 302,981 BBL Cum Gas: 189,527 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,544 BBL/mo

Di (annual)

233.5%

b-factor

0.9

EUR

73,738 BBL

R-squared

0.895

type

hyperbolic

Operator History (from monthly production reports)

2024-01 — 2026-07 GRAYROCK ENERGY II, LLC 31 mo
2017-06 — 2023-12 ROVER PETROLEUM OPERATING, LLC 79 mo
2011-12 — 2017-05 MERIT ENERGY COMPANY 66 mo
2009-05 — 2011-11 PLANTATION OPERATING, LLC 31 mo
2006-12 — 2009-04 L.C.S. PRODUCTION COMPANY 29 mo
1993-10 — 2006-11 WALSH & WATTS, INC. 158 mo
1993-01 — 1993-09 CONOCO INC. 9 mo

Wells (52)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
23GRAYROCK ENERGY II, LLC16,0002011-08-05
23RGRAYROCK ENERGY II, LLC16,0002011-08-05
26GRAYROCK ENERGY II, LLC16,0002011-05-18
25GRAYROCK ENERGY II, LLC16,0002011-05-17
8GRAYROCK ENERGY II, LLC16,0002011-05-17
8WGRAYROCK ENERGY II, LLC16,0002011-05-17
112GRAYROCK ENERGY II, LLC15,4992011-03-30
111GRAYROCK ENERGY II, LLC15,4992011-03-22
108GRAYROCK ENERGY II, LLC15,4992011-03-18
113GRAYROCK ENERGY II, LLC16,0002010-12-03
116GRAYROCK ENERGY II, LLC15,5002010-12-02
105GRAYROCK ENERGY II, LLC15,5002010-09-17
59GRAYROCK ENERGY II, LLC15,0002008-10-13
56GRAYROCK ENERGY II, LLC14,5002003-10-24
54GRAYROCK ENERGY II, LLC14,3501989-11-02
51GRAYROCK ENERGY II, LLC24,3501988-01-20
52GRAYROCK ENERGY II, LLC24,3501988-01-20
55GRAYROCK ENERGY II, LLC14,3501988-01-20
50GRAYROCK ENERGY II, LLC24,3501987-05-04
49GRAYROCK ENERGY II, LLC14,3501982-10-18
48GRAYROCK ENERGY II, LLC14,4501982-06-25
46GRAYROCK ENERGY II, LLC14,4001981-12-29
47GRAYROCK ENERGY II, LLC14,3501981-12-29
45GRAYROCK ENERGY II, LLC14,4001981-12-28
44GRAYROCK ENERGY II, LLC14,3501981-12-21
43GRAYROCK ENERGY II, LLC14,3501981-03-23
42GRAYROCK ENERGY II, LLC14,3501980-09-08
41GRAYROCK ENERGY II, LLC14,3501980-07-21
40GRAYROCK ENERGY II, LLC15,6001980-02-15
37GRAYROCK ENERGY II, LLC14,5501977-12-29
38GRAYROCK ENERGY II, LLC14,5501977-12-29
39GRAYROCK ENERGY II, LLC14,5501977-12-29
35GRAYROCK ENERGY II, LLC14,5501977-08-16
36GRAYROCK ENERGY II, LLC14,5501977-08-16
142-433-00262GRAYROCK ENERGY II, LLC------
1042-433-00274GRAYROCK ENERGY II, LLC------
1142-433-00275GRAYROCK ENERGY II, LLC------
1242-433-00276GRAYROCK ENERGY II, LLC------
1442-433-00278GRAYROCK ENERGY II, LLC------
1542-433-00279GRAYROCK ENERGY II, LLC------
1642-433-00280GRAYROCK ENERGY II, LLC------
1742-433-00281GRAYROCK ENERGY II, LLC------
1842-433-00282GRAYROCK ENERGY II, LLC------
1942-433-00283GRAYROCK ENERGY II, LLC------
242-433-00264GRAYROCK ENERGY II, LLC------
2142-433-00285GRAYROCK ENERGY II, LLC------
2742-433-00290GRAYROCK ENERGY II, LLC------
2942-433-00292GRAYROCK ENERGY II, LLC------
342-433-00266GRAYROCK ENERGY II, LLC------
3342-433-00261GRAYROCK ENERGY II, LLC------
3442-433-80134GRAYROCK ENERGY II, LLC------
942-433-00273GRAYROCK ENERGY II, LLC------