MCMASTER -A-

Oil · District 7C · Lease #5487

Operator: TAMARACK PETROLEUM COMPANY, INC.

Cum Oil

122k BBL

Cum Gas

954k MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2008-06

Production History

Cum Oil: 121,998 BBL Cum Gas: 953,838 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

863 BBL/mo

Di (annual)

9.9%

b-factor

0.0

EUR

104,027 BBL

R-squared

0.553

type

exponential

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 (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3TMPIONEER NATURAL RES. USA, INC.19,0002006-12-20
1402PIONEER NATURAL RES. USA, INC.18,3502003-01-28
142-383-11346PIONEER NATURAL RES. USA, INC.------