CLARK -C

Oil · District 08 · Lease #23439

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

126k BBL

Cum Gas

791k MCF

casinghead

Wells

8

Production

1993-01 — 2026-04

Peak Month

1993-06

Production History

Cum Oil: 126,117 BBL Cum Gas: 791,151 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

636 BBL/mo

Di (annual)

14.8%

b-factor

0.0

EUR

51,593 BBL

R-squared

0.782

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 (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8PIONEER NATURAL RES. USA, INC.19,7002004-06-03
142-173-30169PIONEER NATURAL RES. USA, INC.------
242-173-30213PIONEER NATURAL RES. USA, INC.------
342-173-30227PIONEER NATURAL RES. USA, INC.------
442-173-30226PIONEER NATURAL RES. USA, INC.------
542-173-30232PIONEER NATURAL RES. USA, INC.------
642-173-30233PIONEER NATURAL RES. USA, INC.------
742-173-30274PIONEER NATURAL RES. USA, INC.------