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SCHAEFER -A-

Oil · District 08 · Lease #27260

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

14k BBL

Cum Gas

139k MCF

casinghead

Wells

1

Production

1993-01 — 2009-12

Peak Month

1993-06

Production History

Cum Oil: 14,331 BBL Cum Gas: 138,913 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

75 BBL/mo

Di (annual)

3.3%

b-factor

0.0

EUR

22,235 BBL

R-squared

0.312

type

exponential

Operator History (from monthly production reports)

2008-01 — 2010-08 PIONEER NATURAL RES. USA, INC. 32 mo
2006-05 — 2007-12 CIMAREX ENERGY CO. OF COLORADO 20 mo
2004-11 — 2006-04 GRUY PETROLEUM MANAGEMENT CO. 18 mo
1999-10 — 2004-10 NADEL AND GUSSMAN PERMIAN,L.L.C. 61 mo
1998-04 — 1999-09 CHESAPEAKE OPERATING, INC. 18 mo
1995-09 — 1998-03 HUGOTON ENERGY CORPORATION 31 mo
1993-05 — 1995-08 CONSOLIDATED OIL & GAS, INC 28 mo
1993-01 — 1993-04 AMAX OIL & GAS INC. 4 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
142-173-31101PIONEER NATURAL RES. USA INC.18,4001980-11-18