SCHWARTZ

Oil · District 7C · Lease #6167

Operator: TAMARACK PETROLEUM COMPANY, INC.

Cum Oil

50k BBL

Cum Gas

526k MCF

casinghead

Wells

2

Production

1993-01 — 2026-04

Peak Month

2003-07

Production History

Cum Oil: 49,521 BBL Cum Gas: 526,088 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

642 BBL/mo

Di (annual)

35.0%

b-factor

0.5

EUR

39,561 BBL

R-squared

0.647

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 (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4002PIONEER NATURAL RES. USA, INC.18,5002003-02-04
142-383-30270PIONEER NATURAL RES. USA, INC.------