TXL -3-

Oil · District 08 · Lease #29956

Operator: QUANTUM RESOURCES MANAGEMENT,LLC

Fields: GARDEN CITY, S. (WOLFCAMP)

Cum Oil

95k BBL

Cum Gas

1.8M MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

2014-12

Production History

Cum Oil: 95,392 BBL Cum Gas: 1,825,363 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,604 BBL/mo

Di (annual)

132.7%

b-factor

0.6

EUR

53,949 BBL

R-squared

0.754

type

hyperbolic

Operator History (from monthly production reports)

2021-12 — 2026-07 LANDMARK IP, LLC 56 mo

2015-01 — 2021-11 BREITBURN OPERATING L.P. 83 mo

2006-12 — 2014-12 QUANTUM RESOURCES MANAGEMENT,LLC 97 mo

2006-05 — 2006-11 CIMAREX ENERGY CO. OF COLORADO 7 mo

1997-05 — 2006-04 GRUY PETROLEUM MANAGEMENT CO. 108 mo

1996-08 — 1997-04 BURLINGTON RESOURCES OIL&GAS CO. 9 mo

1993-01 — 1996-07 MERIDIAN OIL INC. 43 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
4	42-173-36673	LANDMARK IP, LLC	1	9,450	2014-07-07
3	42-173-35897	LANDMARK IP, LLC	1	10,250	2013-06-14
1	42-173-31732	LANDMARK IP, LLC	2	10,800	1986-12-18
2	42-173-31852	LANDMARK IP, LLC	2	10,500	1985-06-27