TXL -G-

Oil · District 08 · Lease #25740

Operator: SHERIDAN PRODUCTION COMPANY, LLC

Fields: COWDEN, NORTH

Cum Oil

206k BBL

Cum Gas

281k MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

2005-03

Production History

Cum Oil: 205,807 BBL Cum Gas: 280,984 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,754 BBL/mo

Di (annual)

40.0%

b-factor

0.2

EUR

65,558 BBL

R-squared

0.819

type

hyperbolic

Operator History (from monthly production reports)

2023-03 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 41 mo
2010-09 — 2023-02 LEGACY RESERVES OPERATING LP 150 mo
2007-08 — 2010-08 SHERIDAN PRODUCTION COMPANY, LLC 37 mo
1993-01 — 2007-07 SAGE ENERGY COMPANY 175 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HIGHMARK ENERGY OPERATING, LLC14,2001980-07-03
3HIGHMARK ENERGY OPERATING, LLC14,2001980-06-18
2HIGHMARK ENERGY OPERATING, LLC14,2001979-12-14
1HIGHMARK ENERGY OPERATING, LLC14,2001979-12-10