TXL -27-

Oil · District 08 · Lease #25391

Operator: RIO OIL AND GAS (PERMIAN), LLC

Cum Oil

41k BBL

Cum Gas

60k MCF

casinghead

Wells

2

Production

1993-01 — 2016-07

Peak Month

2011-05

Production History

Cum Oil: 40,912 BBL Cum Gas: 60,097 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

326 BBL/mo

Di (annual)

12.0%

b-factor

0.4

EUR

45,798 BBL

R-squared

0.710

type

hyperbolic

Operator History (from monthly production reports)

2014-09 — 2018-03 DIAMONDBACK E&P LLC 43 mo
2014-05 — 2014-08 RIO OIL AND GAS (PERMIAN), LLC 4 mo
2004-01 — 2014-04 NORTHSTAR OPERATING COMPANY 124 mo
1996-02 — 2003-12 LIMARK CORPORATION 95 mo
1993-01 — 1996-01 MWJ PRODUCING COMPANY 37 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2DIAMONDBACK E&P LLC18,6001981-10-06
1DIAMONDBACK E&P LLC18,6001978-12-08