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COLE, DORIS CHALK

Oil · District 08 · Lease #31218

Operator: PHILLIPS PETROLEUM COMPANY

Fields: HOWARD-GLASSCOCK (WOLFCAMP 7400)

Cum Oil

71k BBL

Cum Gas

1.3M MCF

casinghead

Wells

2

Production

1993-01 — 2026-04

Peak Month

2001-09

Production History

Cum Oil: 70,618 BBL Cum Gas: 1,295,595 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

220 BBL/mo

Di (annual)

11.2%

b-factor

0.5

EUR

34,593 BBL

R-squared

0.351

type

hyperbolic

Operator History (from monthly production reports)

2021-02 — 2026-07 EXTEX OPERATING COMPANY 66 mo
2011-12 — 2021-01 LEGACY RESERVES OPERATING LP 110 mo
2010-09 — 2011-11 PDC ENERGY 15 mo
2010-08 — 2010-08 PDC-WV-CO CORPORATION 1 mo
1995-10 — 2010-07 MERIT ENERGY COMPANY 178 mo
1993-01 — 1995-09 PHILLIPS PETROLEUM COMPANY 33 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-227-34162EXTEX OPERATING COMPANY17,8501987-06-02
142-227-34098EXTEX OPERATING COMPANY17,8001986-11-14