< leases

BRINKLEY, A. S. JR.

Oil · District 7B · Lease #4267

Operator: ROVER PETROLEUM OPERATING, LLC

Fields: FLOWERS (CANYON SAND)

Cum Oil

64k BBL

Cum Gas

14k MCF

casinghead

Wells

5

Production

1993-01 — 2025-03

Peak Month

2011-01

Production History

Cum Oil: 63,844 BBL Cum Gas: 14,029 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

862 BBL/mo

Di (annual)

29.9%

b-factor

0.2

EUR

43,086 BBL

R-squared

0.852

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
2007-09 — 2009-04 L.C.S. PRODUCTION COMPANY 20 mo
1997-05 — 2007-08 PETRA OLEUM CORP. 124 mo
1997-02 — 1997-04 COSTILLA ENERGY, INC. 3 mo
1993-01 — 1997-01 COSTILLA PETROLEUM CORPORATION 49 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10242-433-33731GRAYROCK ENERGY II LLC16,0002011-08-01
242-433-00772GRAYROCK ENERGY II, LLC16,0002011-05-13
10342-433-33612GRAYROCK ENERGY II LLC25,5002010-09-10
642-433-32578GRAYROCK ENERGY II LLC15,1001989-12-28
142-433-00771GRAYROCK ENERGY II LLC------