COBLE "B"

Oil · District 8A · Lease #60439

Operator: WESTPORT OIL AND GAS COMPANY, LP

Fields: LEVELLAND

Cum Oil

552k BBL

Cum Gas

98k MCF

casinghead

Wells

38

Production

1993-01 — 2026-04

Peak Month

1993-06

Production History

Cum Oil: 551,559 BBL Cum Gas: 98,032 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,235 BBL/mo

Di (annual)

14.2%

b-factor

0.6

EUR

598,273 BBL

R-squared

0.936

type

hyperbolic

Operator History (from monthly production reports)

2021-09 — 2026-07 EXTEX OPERATING COMPANY 59 mo
2016-03 — 2021-08 ENDEAVOR ENERGY RESOURCES L.P. 66 mo
2011-03 — 2016-02 TRINITY BAY OIL & GAS, INC. 60 mo
2010-03 — 2011-02 DELEK ENERGY SYSTEMS US, INC. 12 mo
2003-09 — 2010-02 ARIES OPERATING, LP 78 mo
2002-08 — 2003-08 ARIES OPERATING, LLC 13 mo
2002-03 — 2002-07 WESTPORT OIL AND GAS COMPANY, LP 5 mo
1998-09 — 2002-02 BELCO ENERGY CORP. 42 mo
1995-01 — 1998-08 CODA ENERGY, INC. 44 mo
1993-01 — 1994-12 MOBIL PRODUCING TX. & N.M. INC. 24 mo

Wells (38)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
59EXTEX OPERATING COMPANY25,1001993-04-20
59WEXTEX OPERATING COMPANY25,1001993-04-20
7AEXTEX OPERATING COMPANY15,2001987-06-26
35AEXTEX OPERATING COMPANY15,1001984-03-23
58WEXTEX OPERATING COMPANY15,1001982-09-02
56EXTEX OPERATING COMPANY15,0001979-10-19
57EXTEX OPERATING COMPANY15,0001979-10-19
142-219-82100EXTEX OPERATING COMPANY------
1042-219-02201EXTEX OPERATING COMPANY------
1242-219-81673EXTEX OPERATING COMPANY------
1342-219-81674EXTEX OPERATING COMPANY------
1442-219-81675EXTEX OPERATING COMPANY------
242-219-00965EXTEX OPERATING COMPANY------
3142-219-81676EXTEX OPERATING COMPANY------
3242-219-81677EXTEX OPERATING COMPANY------
3442-219-00985EXTEX OPERATING COMPANY------
3642-219-31550EXTEX OPERATING COMPANY------
37W42-219-31869EXTEX OPERATING COMPANY------
38W42-219-31870EXTEX OPERATING COMPANY------
39W42-219-31868EXTEX OPERATING COMPANY------
442-219-81669EXTEX OPERATING COMPANY------
40W42-219-31867EXTEX OPERATING COMPANY------
4142-219-31854EXTEX OPERATING COMPANY------
42W42-219-31857EXTEX OPERATING COMPANY------
43W42-219-31856EXTEX OPERATING COMPANY------
44W42-219-31866EXTEX OPERATING COMPANY------
45W42-219-31885EXTEX OPERATING COMPANY------
46W42-219-31886EXTEX OPERATING COMPANY------
47W42-219-31855EXTEX OPERATING COMPANY------
48W42-219-31884EXTEX OPERATING COMPANY------
49W42-219-31882EXTEX OPERATING COMPANY------
542-219-02199EXTEX OPERATING COMPANY------
50W42-219-31883EXTEX OPERATING COMPANY------
51W42-219-31880EXTEX OPERATING COMPANY------
52W42-219-31881EXTEX OPERATING COMPANY------
53W42-219-31879EXTEX OPERATING COMPANY------
642-219-00977EXTEX OPERATING COMPANY------
942-219-02200EXTEX OPERATING COMPANY------