FOSTER, W. L., JR., -B-

Oil · District 08 · Lease #4666

Operator: XOG OPERATING LLC

Cum Oil

40k BBL

Cum Gas

1k MCF

casinghead

Wells

10

Production

1993-01 — 2019-08

Peak Month

1993-01

Production History

Cum Oil: 39,840 BBL Cum Gas: 1,477 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

384 BBL/mo

Di (annual)

12.1%

b-factor

0.0

EUR

38,137 BBL

R-squared

0.685

type

exponential

Operator History (from monthly production reports)

2020-04 — 2026-07 D & D WELL SERVICE, L.L.C. 76 mo
2016-04 — 2020-03 BAYLOR OPERATING, LLC 48 mo
2009-09 — 2016-03 XOG OPERATING LLC 79 mo
2005-04 — 2009-08 BARKER BROWN INVESTMENTS, LLC. 53 mo
2005-01 — 2005-03 RORY ENERGY 3 mo
2004-08 — 2004-12 ADT INVESTMENTS, INC. 5 mo
2002-04 — 2004-07 XERIC OIL & GAS CORPORATION 28 mo
1999-04 — 2002-03 POWELL, A. BRANDT CO. 36 mo
1995-08 — 1999-03 POWELL, A. BRANDT 44 mo
1994-11 — 1995-07 DALLAS PRODUCTION, INC. 9 mo
1993-01 — 1994-10 UNION OIL COMPANY OF CALIFORNIA 22 mo

Wells (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
18 UD & D WELL SERVICE L.L.C.23,2001989-02-17
19 UD & D WELL SERVICE L.L.C.23,2001988-12-22
21 UD & D WELL SERVICE L.L.C.13,0001987-05-19
22 UD & D WELL SERVICE L.L.C.13,0001987-05-19
23WD & D WELL SERVICE L.L.C.13,0001987-05-19
20 UD & D WELL SERVICE L.L.C.13,2001986-09-29
5D & D WELL SERVICE L.L.C.11,3941983-10-25
242-431-00517D & D WELL SERVICE L.L.C.------
342-431-00518D & D WELL SERVICE L.L.C.------
442-431-00519D & D WELL SERVICE L.L.C.------