PROBANDT -58-

Oil · District 7C · Lease #8234

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

27k BBL

Cum Gas

351k MCF

casinghead

Wells

2

Production

1993-01 — 2025-06

Peak Month

1993-07

Production History

Cum Oil: 26,810 BBL Cum Gas: 350,756 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

110 BBL/mo

Di (annual)

11.6%

b-factor

0.0

EUR

11,218 BBL

R-squared

0.501

type

exponential

Operator History (from monthly production reports)

1997-09 — 2026-07 PIONEER NATURAL RES. USA, INC. 347 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6PIONEER NATURAL RES. USA INC.17,4001983-11-14
8PIONEER NATURAL RES. USA INC.17,4001983-11-14