MASTEN "C"

Oil · District 8A · Lease #66961

Operator: WALSH PETROLEUM, INC.

Fields: LEVELLAND

Cum Oil

438k BBL

Cum Gas

579k MCF

casinghead

Wells

18

Production

1993-02 — 2026-04

Peak Month

1993-06

Production History

Cum Oil: 438,364 BBL Cum Gas: 578,659 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,072 BBL/mo

Di (annual)

10.9%

b-factor

0.0

EUR

335,731 BBL

R-squared

0.954

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 (18)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
12EXTEX OPERATING COMPANY15,1002004-02-13
11EXTEX OPERATING COMPANY15,1001997-03-24
10EXTEX OPERATING COMPANY15,1001997-03-19
6EXTEX OPERATING COMPANY25,1001997-03-18
9EXTEX OPERATING COMPANY15,1001996-11-07
16EXTEX OPERATING COMPANY25,1001993-05-19
17EXTEX OPERATING COMPANY15,1001993-05-19
18EXTEX OPERATING COMPANY15,1001993-05-19
19EXTEX OPERATING COMPANY15,1001993-05-19
20EXTEX OPERATING COMPANY15,1001993-05-05
21EXTEX OPERATING COMPANY15,1001993-05-05
7EXTEX OPERATING COMPANY15,1001993-01-22
1EXTEX OPERATING COMPANY15,1001993-01-21
4EXTEX OPERATING COMPANY15,1001993-01-21
5EXTEX OPERATING COMPANY15,1001993-01-21
8EXTEX OPERATING COMPANY15,1001993-01-21
3EXTEX OPERATING COMPANY15,1001993-01-13
242-079-01929EXTEX OPERATING COMPANY------