< leases

SUN MARK EXPLORATION

Oil · District 01 · Lease #7875

Operator: THOMAS OIL & GAS COMPANY

Fields: SALT FLAT, WEST

Cum Oil

21k BBL

Cum Gas

25k MCF

casinghead

Wells

6

Production

1993-01 — 2026-04

Peak Month

1993-08

Production History

Cum Oil: 20,916 BBL Cum Gas: 24,552 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

173 BBL/mo

Di (annual)

57.7%

b-factor

0.8

EUR

9,864 BBL

R-squared

0.540

type

hyperbolic

Operator History (from monthly production reports)

2007-03 — 2026-07 CASTILLO OIL COMPANY LLC 233 mo
2006-12 — 2007-02 CASTILLO OIL CO. 3 mo
2003-05 — 2006-11 LTS ENERGY, L.P. 43 mo
2000-02 — 2003-04 THOMAS OIL & GAS COMPANY 39 mo
1998-08 — 2000-01 LTS ENERGY, L.P. 18 mo
1997-02 — 1998-07 THOMAS OIL & GAS COMPANY 18 mo
1993-08 — 1997-01 MITCHELL PRODUCTION, INC. 42 mo
1993-01 — 1993-07 POLO PETROLEUM, INC. 7 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1A42-055-32273CASTILLO OIL COMPANY LLC23,0001982-02-18
1C42-055-32269CASTILLO OIL COMPANY LLC23,0001982-02-18
2A42-055-32272CASTILLO OIL COMPANY LLC23,0001982-02-18
2B42-055-32270CASTILLO OIL COMPANY LLC23,0001982-02-18
2C42-055-32268CASTILLO OIL COMPANY LLC23,0001982-02-18
1B42-055-32271CASTILLO OIL COMPANY LLC13,0001981-09-04