< leases

KOEHLER

Oil · District 01 · Lease #1144

Operator: TEXAS COAST OPERATING, INC.

Fields: LULING-BRANYON

Cum Oil

1k BBL

Cum Gas

20 MCF

casinghead

Wells

4

Production

1993-01 — 1998-10

Peak Month

1994-12

Production History

Cum Oil: 1,079 BBL Cum Gas: 20 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

79 BBL/mo

Di (annual)

205.8%

b-factor

0.4

EUR

716 BBL

R-squared

0.744

type

hyperbolic

Operator History (from monthly production reports)

1998-01 — 2026-07 AUSTIN OPERATING, LLC. 343 mo
1997-06 — 1997-12 LIF-TEX OIL RECOVERY, INC. 7 mo
1996-11 — 1997-05 GLOBAL ENERGY GROUP, INC. 7 mo
1994-09 — 1996-10 BENNETT OIL 26 mo
1993-01 — 1994-08 TEXAS COAST OPERATING, INC. 20 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
642-055-01620AUSTIN OPERATING, LLC.12,6001982-02-04
142-055-01619CASTILLO OIL COMPANY LLC------
242-055-80332CASTILLO OIL COMPANY LLC------
342-055-01597CASTILLO OIL COMPANY LLC------