CASS "A"

Oil · District 08 · Lease #38554

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

83k BBL

Cum Gas

149k MCF

casinghead

Wells

3

Production

2007-11 — 2021-10

Peak Month

2012-06

Production History

Cum Oil: 82,825 BBL Cum Gas: 148,810 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

922 BBL/mo

Di (annual)

20.0%

b-factor

0.0

EUR

55,341 BBL

R-squared

0.376

type

exponential

Operator History (from monthly production reports)

2007-11 — 2026-07 PIONEER NATURAL RES. USA, INC. 225 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
20DPIONEER NATURAL RES. USA INC.111,2002016-09-15
2PIONEER NATURAL RES. USA INC.111,3852011-11-29
1PIONEER NATURAL RES. USA INC.110,0002007-07-30