DUVAL COUNTY RANCH CO. -K-

Oil · District 04 · Lease #12377

Operator: SOUTHWESTERN ENERGY PROD. CO.

Cum Oil

8k BBL

Cum Gas

23k MCF

casinghead

Wells

1

Production

1994-05 — 1998-02

Peak Month

1995-03

Production History

Cum Oil: 7,859 BBL Cum Gas: 23,259 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

485 BBL/mo

Di (annual)

181.8%

b-factor

0.6

EUR

7,336 BBL

R-squared

0.548

type

hyperbolic

Operator History (from monthly production reports)

1996-09 — 1999-02 SOUTHWESTERN ENERGY PROD. CO. 30 mo
1994-05 — 1996-08 EXXON CORP. 28 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
58TEXAS PETROLEUM INVESTMENT CO.34,8501998-01-28