UNIVERSITY 31-8

Oil · District 08 · Lease #42308

Operator: STRONGHOLD ENERGY II OPER, LLC

Fields: BLOCK 31, NW. (PENN UPPER)

Cum Oil

30k BBL

Cum Gas

40k MCF

casinghead

Wells

2

Production

2011-08 — 2026-04

Peak Month

2013-03

Production History

Cum Oil: 29,770 BBL Cum Gas: 40,274 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

382 BBL/mo

Di (annual)

158.7%

b-factor

2.0

EUR

33,625 BBL

R-squared

0.305

type

hyperbolic

Operator History (from monthly production reports)

2022-09 — 2026-07 RING ENERGY, INC. 47 mo

2019-01 — 2022-08 STRONGHOLD ENERGY II OPER, LLC 44 mo

2011-08 — 2018-12 DEVON ENERGY PRODUCTION CO, L.P. 89 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2H	42-103-35900	RING ENERGY, INC.	1	7,950	2011-10-27
3H	42-103-35837	RING ENERGY, INC.	1	7,950	2011-05-03