TXL -A-

Oil · District 08 · Lease #17715

Operator: SOUTHWEST ROYALTIES, INC.

Fields: HERRELL

Cum Oil

111k BBL

Cum Gas

21 MCF

casinghead

Wells

4

Production

1993-01 — 2026-03

Peak Month

1999-01

Production History

Cum Oil: 110,963 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

403 BBL/mo

Di (annual)

6.2%

b-factor

0.0

EUR

74,556 BBL

R-squared

0.394

type

exponential

Operator History (from monthly production reports)

2020-01 — 2026-07 BLACK RIVER OPERATING LLC 79 mo
2009-06 — 2019-12 APACHE CORPORATION 127 mo
1998-08 — 2009-05 MARATHON OIL COMPANY 130 mo
1993-01 — 1998-07 SOUTHWEST ROYALTIES, INC. 67 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
15BLACK RIVER OPERATING LLC12,7001982-11-09
10D42-431-10032BLACK RIVER OPERATING LLC------
8 C42-431-00197BLACK RIVER OPERATING LLC------
9 C42-431-00198BLACK RIVER OPERATING LLC------