ULS 5-22

Oil · District 08 · Lease #40503

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

117k BBL

Cum Gas

158k MCF

casinghead

Wells

5

Production

2011-01 — 2026-04

Peak Month

2012-05

Production History

Cum Oil: 117,176 BBL Cum Gas: 157,661 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,133 BBL/mo

Di (annual)

41.8%

b-factor

0.6

EUR

126,248 BBL

R-squared

0.818

type

hyperbolic

Operator History (from monthly production reports)

2023-06 — 2026-07 OVINTIV USA INC. 38 mo

2016-12 — 2023-05 PIEDRA OPERATING, LLC 78 mo

2016-09 — 2016-11 PIONEER NATURAL RES. USA, INC. 3 mo

2011-01 — 2016-08 DEVON ENERGY PRODUCTION CO, L.P. 68 mo

Wells (5)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
5H	42-003-43191	OVINTIV USA INC.	1	11,500	2011-07-25
1R	42-003-42334	OVINTIV USA INC.	1	11,500	2010-12-09
3	42-003-42076	OVINTIV USA INC.	3	11,500	2010-09-22
2	42-003-41118	OVINTIV USA INC.	1	11,000	2009-08-06
4	42-003-41119	OVINTIV USA INC.	1	11,000	2009-08-06