MASTEN, F. O. "B"

Oil · District 8A · Lease #66964

Operator: WALSH PETROLEUM, INC.

Fields: LEVELLAND

Cum Oil

63k BBL

Cum Gas

1.5M MCF

casinghead

Wells

7

Production

1993-02 — 2026-04

Peak Month

1994-04

Production History

Cum Oil: 62,641 BBL Cum Gas: 1,537,973 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

323 BBL/mo

Di (annual)

6.2%

b-factor

0.0

EUR

59,302 BBL

R-squared

0.626

type

exponential

Operator History (from monthly production reports)

2023-01 — 2026-07 EXTEX OPERATING COMPANY 43 mo
1997-11 — 2022-12 WALSH PETROLEUM, INC. 302 mo
1993-02 — 1997-10 PARKER & PARSLEY, WPI AGENT 57 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7EXTEX OPERATING COMPANY15,1001993-05-13
8EXTEX OPERATING COMPANY15,1001993-05-13
9EXTEX OPERATING COMPANY15,1001993-05-13
4EXTEX OPERATING COMPANY15,1001993-02-04
1EXTEX OPERATING COMPANY15,1001993-01-21
2EXTEX OPERATING COMPANY15,1001993-01-21
3EXTEX OPERATING COMPANY15,1001993-01-13