WALLIN, H.C.

Oil · District 08 · Lease #40670

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

16k BBL

Cum Gas

207k MCF

casinghead

Wells

1

Production

2010-06 — 2018-09

Peak Month

2011-01

Production History

Cum Oil: 15,624 BBL Cum Gas: 206,735 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

487 BBL/mo

Di (annual)

153.1%

b-factor

0.8

EUR

12,283 BBL

R-squared

0.572

type

hyperbolic

Operator History (from monthly production reports)

2016-09 — 2021-04 PIONEER NATURAL RES. USA, INC. 56 mo

2010-06 — 2016-08 DEVON ENERGY PRODUCTION CO, L.P. 75 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
3	42-329-31460	CHEVRON U. S. A. INC.	4	13,700	2010-02-12