WEST SHINER RANCH

Oil · District 01 · Lease #12616

Operator: SANCHEZ-O'BRIEN OIL & GAS CORP.

Cum Oil

153k BBL

Cum Gas

49k MCF

casinghead

Wells

2

Production

1993-01 — 2020-12

Peak Month

1997-05

Production History

Cum Oil: 153,343 BBL Cum Gas: 48,512 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,167 BBL/mo

Di (annual)

14.9%

b-factor

0.1

EUR

103,657 BBL

R-squared

0.807

type

hyperbolic

Operator History (from monthly production reports)

1994-11 — 2026-07 FIRST ROCK, INC. 381 mo
1993-01 — 1994-10 SANCHEZ-O'BRIEN OIL & GAS CORP. 22 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2FIRST ROCK INC.38,7001991-05-20
1LEMON RICHARD G.18,5001984-07-02