MCMASTER

Oil · District 7C · Lease #5148

Operator: TAMARACK PETROLEUM COMPANY, INC.

Cum Oil

140k BBL

Cum Gas

946k MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

2007-06

Production History

Cum Oil: 139,866 BBL Cum Gas: 945,634 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,374 BBL/mo

Di (annual)

20.5%

b-factor

0.3

EUR

110,601 BBL

R-squared

0.838

type

hyperbolic

Operator History (from monthly production reports)

2021-02 — 2026-07 PIONEER NATURAL RES. USA, INC. 66 mo
2017-03 — 2021-01 PARSLEY ENERGY OPERATIONS, LLC 47 mo
2010-12 — 2017-02 APACHE CORPORATION 75 mo
2007-12 — 2010-11 MARINER ENERGY, INC. 36 mo
1993-01 — 2007-11 TAMARACK PETROLEUM COMPANY, INC. 179 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3TMPIONEER NATURAL RES. USA, INC.19,0002007-01-03
4TMPIONEER NATURAL RES. USA, INC.19,0002006-04-11
2TMPIONEER NATURAL RES. USA, INC.19,0002005-11-01
142-383-11083PIONEER NATURAL RES. USA, INC.------