MONARCH

Oil · District 01 · Lease #11598

Operator: LETY OIL CO.

Fields: TENNEY CREEK

Cum Oil

9k BBL

Cum Gas

5k MCF

casinghead

Wells

2

Production

1993-01 — 2026-04

Peak Month

1997-11

Production History

Cum Oil: 9,457 BBL Cum Gas: 4,900 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

43 BBL/mo

Di (annual)

5.6%

b-factor

0.0

EUR

8,604 BBL

R-squared

0.380

type

exponential

Operator History (from monthly production reports)

2007-03 — 2026-07 CASTILLO OIL COMPANY LLC 233 mo
2002-09 — 2007-02 CASTILLO OIL CO. 54 mo
1995-09 — 2002-08 LETY OIL CO. 84 mo
1993-01 — 1995-08 DUNKIN, RAY L. 32 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ACASTILLO OIL COMPANY LLC13,0001986-08-29
1CASTILLO OIL COMPANY LLC13,0001986-06-12