ALMA

Oil · District 08 · Lease #18022

Operator: THREE RIVERS OPERATING CO LLC

Fields: TXL (TUBB)

Cum Oil

151k BBL

Cum Gas

303k MCF

casinghead

Wells

6

Production

1993-01 — 2026-04

Peak Month

1997-09

Production History

Cum Oil: 151,276 BBL Cum Gas: 302,757 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,128 BBL/mo

Di (annual)

11.1%

b-factor

0.0

EUR

121,896 BBL

R-squared

0.659

type

exponential

Operator History (from monthly production reports)

2023-03 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 41 mo
2013-01 — 2023-02 LEGACY RESERVES OPERATING LP 122 mo
2012-08 — 2012-12 COG OPERATING LLC 5 mo
2010-04 — 2012-07 THREE RIVERS OPERATING CO LLC 28 mo
2004-05 — 2010-03 CHESAPEAKE OPERATING, INC. 71 mo
2000-05 — 2004-04 PERMIAN RESOURCES, INC. 48 mo
1995-10 — 2000-04 MERIT ENERGY COMPANY 55 mo
1993-01 — 1995-09 PHILLIPS PETROLEUM COMPANY 33 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HIGHMARK ENERGY OPERATING, LLC19,8772009-07-13
7HIGHMARK ENERGY OPERATING, LLC39,8772009-03-02
5HIGHMARK ENERGY OPERATING, LLC59,8202006-06-09
8HIGHMARK ENERGY OPERATING, LLC39,8211999-10-27
9HIGHMARK ENERGY OPERATING, LLC19,0421983-04-20
10HIGHMARK ENERGY OPERATING, LLC17,0001982-03-15