SHAFFER

Oil · District 7B · Lease #27521

Operator: WINDHAM RESOURCES, INC.

Cum Oil

55k BBL

Cum Gas

245k MCF

casinghead

Wells

3

Production

1995-01 — 2019-02

Peak Month

1996-08

Production History

Cum Oil: 55,132 BBL Cum Gas: 244,933 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

544 BBL/mo

Di (annual)

17.5%

b-factor

0.0

EUR

37,183 BBL

R-squared

0.606

type

exponential

Operator History (from monthly production reports)

2019-09 — 2026-07 TEJAS PETROLEUM RESOURCES, LLC 83 mo
2017-10 — 2019-08 US. FUELS, INC. 23 mo
2015-06 — 2017-09 D.J. & T. ENERGY 28 mo
2007-01 — 2015-05 S & H RESOURCES 101 mo
2004-03 — 2006-12 WINDHAM RESOURCES 34 mo
2002-04 — 2004-02 WINDHAM RESOURCES, INC. 23 mo
1995-01 — 2002-03 PRINCIPAL OIL CORP. 87 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3TEJAS PETROLEUM RESOURCES LLC14,9991995-11-15
2TEJAS PETROLEUM RESOURCES LLC14,9991995-10-31
1TEJAS PETROLEUM RESOURCES LLC14,9991994-11-30