OLDHAM, D. M., JR., ETAL

Oil · District 7C · Lease #1428

Operator: TSF OPERATING

Cum Oil

189k BBL

Cum Gas

235k MCF

casinghead

Wells

2

Production

1993-01 — 2019-01

Peak Month

2002-01

Production History

Cum Oil: 189,426 BBL Cum Gas: 234,534 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,680 BBL/mo

Di (annual)

14.9%

b-factor

0.0

EUR

134,910 BBL

R-squared

0.443

type

exponential

Operator History (from monthly production reports)

2016-06 — 2020-04 PIONEER NATURAL RES. USA, INC. 47 mo
2016-03 — 2016-05 PARSLEY ENERGY OPERATIONS, LLC 3 mo
2007-06 — 2016-02 LEGACY RESERVES OPERATING LP 105 mo
1993-01 — 2007-05 TSF OPERATING 173 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PIONEER NATURAL RES. USA INC.19,2502001-08-23
142-461-02667PIONEER NATURAL RES. USA INC.------