FOSTER, R. W. -23-

Oil · District 08 · Lease #8559

Operator: XOG OPERATING LLC

Cum Oil

13k BBL

Cum Gas

23 MCF

casinghead

Wells

7

Production

1993-01 — 2025-08

Peak Month

1993-03

Production History

Cum Oil: 13,401 BBL Cum Gas: 23 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

204 BBL/mo

Di (annual)

49.5%

b-factor

0.5

EUR

9,157 BBL

R-squared

0.533

type

hyperbolic

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
2004-07 — 2009-08 BARKER BROWN INVESTMENTS, LLC. 62 mo
2001-06 — 2004-06 XERIC OIL & GAS CORPORATION 37 mo
2000-01 — 2001-05 CAPPS, R. OIL CORP. 17 mo
1999-11 — 1999-12 XERIC OIL & GAS CORPORATION 2 mo
1998-10 — 1999-10 PHARAOH OIL & GAS, INC. 13 mo
1997-09 — 1998-09 WESTCO OIL COMPANY 13 mo
1996-12 — 1997-08 WESTCO PRODUCING COMPANY 9 mo
1996-06 — 1996-11 PHARAOH OIL & GAS, INC. 6 mo
1993-01 — 1996-05 FINA OIL & CHEMICAL COMPANY 41 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
19WD & D WELL SERVICE L.L.C.11,2001985-03-19
18WD & D WELL SERVICE L.L.C.11,2001985-03-15
1142-431-00104D & D WELL SERVICE L.L.C.------
1442-431-10309D & D WELL SERVICE L.L.C.------
1642-431-30053D & D WELL SERVICE L.L.C.------
742-431-00092D & D WELL SERVICE L.L.C.------
942-431-00102D & D WELL SERVICE L.L.C.------