SCHWARTZ -A-

Oil · District 7C · Lease #6718

Operator: TAMARACK PETROLEUM COMPANY, INC.

Cum Oil

107k BBL

Cum Gas

888k MCF

casinghead

Wells

4

Production

1993-01 — 2026-01

Peak Month

2013-09

Production History

Cum Oil: 106,601 BBL Cum Gas: 888,108 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,644 BBL/mo

Di (annual)

55.2%

b-factor

0.2

EUR

44,570 BBL

R-squared

0.915

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
4PIONEER NATURAL RES. USA INC.28,3002013-02-06
3TMPIONEER NATURAL RES. USA INC.19,0002006-05-15
2PIONEER NATURAL RES. USA INC.110,2001984-07-31
142-383-30628PIONEER NATURAL RES. USA INC.------