WINDHAM -B-

Oil · District 08 · Lease #11878

Operator: STEPHENS, AUTRY C.

Cum Oil

184k BBL

Cum Gas

466k MCF

casinghead

Wells

4

Production

1993-01 — 2009-03

Peak Month

1994-08

Production History

Cum Oil: 183,625 BBL Cum Gas: 465,760 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,139 BBL/mo

Di (annual)

23.2%

b-factor

0.8

EUR

243,936 BBL

R-squared

0.732

type

hyperbolic

Operator History (from monthly production reports)

2000-09 — 2011-01 ENDEAVOR ENERGY RESOURCES L.P. 125 mo
1993-04 — 2000-08 STEPHENS, AUTRY C. 89 mo
1993-01 — 1993-03 DEVON ENERGY CORPORATION(NEVADA) 3 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3DIAMONDBACK E&P LLC19,9001993-08-26
4DIAMONDBACK E&P LLC19,9001993-08-25
142-329-01449DIAMONDBACK E&P LLC------
242-329-01451DIAMONDBACK E&P LLC------