MARKS

Oil · District 7C · Lease #11702

Operator: SOJOURNER DRILLING CORPORATION

Cum Oil

27k BBL

Cum Gas

81k MCF

casinghead

Wells

6

Production

1993-01 — 2010-12

Peak Month

1993-03

Production History

Cum Oil: 26,922 BBL Cum Gas: 80,508 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

585 BBL/mo

Di (annual)

26.9%

b-factor

0.0

EUR

26,024 BBL

R-squared

0.917

type

exponential

Operator History (from monthly production reports)

2002-07 — 2013-11 SOJOURNER DRILLING CORPORATION 137 mo
2000-04 — 2002-06 QUICKSILVER RESOURCES INC. 27 mo
1993-01 — 2000-03 MSR EXPLORATION, INC. 87 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6SOJOURNER DRILLING CORPORATION13,9751991-02-12
5SOJOURNER DRILLING CORPORATION13,9751990-11-07
4SOJOURNER DRILLING CORPORATION14,4001986-09-19
3SOJOURNER DRILLING CORPORATION14,4001986-07-15
1SOJOURNER DRILLING CORPORATION14,3501985-09-27
2SOJOURNER DRILLING CORPORATION25,5001985-09-27