< leases

DUVAL RANCH SEC. 203

Oil · District 04 · Lease #8921

Operator: KILLAM OIL COMPANY

Fields: PETROX, N. (FRIO 1250)

Cum Oil

134k BBL

Cum Gas

57 MCF

casinghead

Wells

5

Production

1993-01 — 2026-04

Peak Month

1993-07

Production History

Cum Oil: 134,424 BBL Cum Gas: 57 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

611 BBL/mo

Di (annual)

5.8%

b-factor

0.4

EUR

143,742 BBL

R-squared

0.657

type

hyperbolic

Operator History (from monthly production reports)

1994-04 — 2026-07 KILLAM OIL CO., LTD. 388 mo
1994-01 — 1994-03 KILLAM OIL COMPANY 3 mo
1993-01 — 1993-12 DUNIGAN PETROLEUM, INC. 12 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4242-131-39473KILLAM OIL CO., LTD.14,0002014-06-18
4142-131-35195KILLAM OIL CO., LTD.12,4001981-06-17
3942-131-32907KILLAM OIL CO., LTD.11,5001978-10-12
3842-131-32339KILLAM OIL CO., LTD.11,5001977-08-26
3742-131-32098KILLAM OIL CO., LTD.12,0001977-06-22