ULS 5-27

Oil · District 08 · Lease #40212

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

84k BBL

Cum Gas

99k MCF

casinghead

Wells

4

Production

2010-02 — 2023-06

Peak Month

2010-04

Production History

Cum Oil: 84,353 BBL Cum Gas: 98,977 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,471 BBL/mo

Di (annual)

33.1%

b-factor

0.4

EUR

84,587 BBL

R-squared

0.409

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

2010-09 — 2016-08 DEVON ENERGY PRODUCTION CO, L.P. 72 mo

2010-02 — 2010-08 HENRY RESOURCES LLC 7 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
4	42-003-42914	OVINTIV USA INC.	1	11,500	2011-05-11
16	42-003-41808	OVINTIV USA INC.	2	11,400	2010-07-05
15	42-003-41339	OVINTIV USA INC.	1	11,300	2009-12-08
2715	42-003-41339	OVINTIV USA INC.	1	11,300	2009-12-08