OBRIEN, J. J., -A-

Oil · District 02 · Lease #3959

Operator: GRETA OPERATING COMPANY LLC

Fields: GRETA (4400)

Cum Oil

124k BBL

Cum Gas

48k MCF

casinghead

Wells

7

Production

1993-01 — 2017-04

Peak Month

2005-01

Production History

Cum Oil: 123,823 BBL Cum Gas: 48,080 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,205 BBL/mo

Di (annual)

16.6%

b-factor

0.3

EUR

117,777 BBL

R-squared

0.785

type

hyperbolic

Operator History (from monthly production reports)

2020-12 — 2026-07 GRETA OPERATING COMPANY LLC 68 mo
2004-05 — 2020-11 ACOCK/ANAQUA OPERATING CO., LP 199 mo
2002-04 — 2004-04 ACOCK/ANAQUA OPERATING CO., LC 25 mo
2001-08 — 2002-03 ACOCK ENGINEERING & ASSOC., INC. 8 mo
1993-01 — 2001-07 CHILTON ENERGY 103 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9ATLANTIC RICHFIELD CO.37,9812002-10-23
5CHILTON ENERGY14,7301994-04-21
2GRETA OPERATING COMPANY LLC22,3801993-12-10
7CHILTON ENERGY25,9241987-04-01
142-391-00815GRETA OPERATING COMPANY LLC------
1042-391-30330GRETA OPERATING COMPANY LLC------
342-391-82066GRETA OPERATING COMPANY LLC------