MATLOCK, O. L. -B-

Oil · District 09 · Lease #19566

Operator: UNDERWOOD, JIM

Fields: ARCHER COUNTY REGULAR

Cum Oil

1k BBL

Cum Gas

227 MCF

casinghead

Wells

4

Production

1993-01 — 2012-12

Peak Month

1993-07

Production History

Cum Oil: 1,199 BBL Cum Gas: 227 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

9 BBL/mo

Di (annual)

8.7%

b-factor

0.0

EUR

1,110 BBL

R-squared

0.384

type

exponential

Operator History (from monthly production reports)

2012-01 — 2026-07 CVS OPERATING, LLC. 175 mo

2009-04 — 2011-12 DRENNAN, D. E. 33 mo

2008-09 — 2009-03 C & J MATLOCK OIL 7 mo

1993-01 — 2008-08 UNDERWOOD, JIM 188 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
5	42-009-37267	CVS OPERATING LLC.	1	700	1983-07-07
2	42-009-20223	CVS OPERATING, LLC.	1	680	1980-06-24
3	42-009-34465	CVS OPERATING LLC.	1	680	1980-06-24
1	42-009-86919	CVS OPERATING LLC.	1	670	1979-08-14