CASTELLANO

Oil · District 01 · Lease #10933

Operator: TEXAS SECONDARY OIL CORPORATION

Fields: SOMERSET

Cum Oil

4k BBL

Cum Gas

38 MCF

casinghead

Wells

5

Production

1993-01 — 2026-04

Peak Month

2008-02

Production History

Cum Oil: 4,409 BBL Cum Gas: 38 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

49 BBL/mo

Di (annual)

24.8%

b-factor

0.1

EUR

2,570 BBL

R-squared

0.750

type

hyperbolic

Operator History (from monthly production reports)

2017-12 — 2026-07 TEXAS SECONDARY OIL CORPORATION 104 mo
1993-01 — 2017-11 CLARK, G. A., TRUSTEE 299 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5TEXAS SECONDARY OIL CORPORATION11,2001980-04-22
4TEXAS SECONDARY OIL CORPORATION11,2001980-03-26
3TEXAS SECONDARY OIL CORPORATION11,2001979-12-31
2TEXAS SECONDARY OIL CORPORATION11,2001979-10-22
1TEXAS SECONDARY OIL CORPORATION11,2001979-08-30