ULS 5-23

Oil · District 08 · Lease #40922

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

33k BBL

Cum Gas

41k MCF

casinghead

Wells

2

Production

2010-12 — 2026-04

Peak Month

2011-04

Production History

Cum Oil: 33,386 BBL Cum Gas: 41,111 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

296 BBL/mo

Di (annual)

10.1%

b-factor

0.0

EUR

35,097 BBL

R-squared

0.357

type

exponential

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

2010-12 — 2016-08 DEVON ENERGY PRODUCTION CO, L.P. 69 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-003-42641	OVINTIV USA INC.	1	11,500	2011-02-14
1	42-003-42089	OVINTIV USA INC.	3	11,500	2010-09-22