COUEY -A-

Oil · District 08 · Lease #23871

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

120k BBL

Cum Gas

1.3M MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

2004-10

Production History

Cum Oil: 120,127 BBL Cum Gas: 1,296,433 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

544 BBL/mo

Di (annual)

9.4%

b-factor

0.0

EUR

68,848 BBL

R-squared

0.796

type

exponential

Operator History (from monthly production reports)

2004-01 — 2026-07 PIONEER NATURAL RES. USA, INC. 271 mo
1993-01 — 2003-12 BROWN, TOM INC. 132 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4PIONEER NATURAL RES. USA, INC.18,4002004-06-08
3PIONEER NATURAL RES. USA, INC.18,4501985-10-22
142-173-30306PIONEER NATURAL RES. USA, INC.------
242-173-30307PIONEER NATURAL RES. USA, INC.------