< leases

UNIVERSITY 14

Oil · District 7C · Lease #12851

Operator: R K PETROLEUM CORP.

Fields: BLOCK 38 (ELLENBURGER)

Cum Oil

147k BBL

Cum Gas

1.1M MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

1994-03

Production History

Cum Oil: 146,840 BBL Cum Gas: 1,065,048 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

677 BBL/mo

Di (annual)

6.5%

b-factor

0.0

EUR

119,364 BBL

R-squared

0.650

type

exponential

Operator History (from monthly production reports)

2025-06 — 2026-07 PETX OPERATING LLC 14 mo
2023-06 — 2025-05 IRON ORCHARD OPERATING LLC 24 mo
2008-12 — 2023-05 OSBORN HEIRS COMPANY 174 mo
2003-06 — 2008-11 RIM OPERATING, INC. 66 mo
2003-01 — 2003-05 BARRETT, BILL CORPORATION 5 mo
1996-02 — 2002-12 ARATEX PRODUCTION COMPANY 83 mo
1993-01 — 1996-01 R K PETROLEUM CORP. 37 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
142-105-35602PETX OPERATING LLC29,2001989-03-13