O BRIEN -A-

Oil · District 08 · Lease #6268

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

280k BBL

Cum Gas

326k MCF

casinghead

Wells

8

Production

1993-01 — 2021-08

Peak Month

1995-04

Production History

Cum Oil: 279,775 BBL Cum Gas: 326,444 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,238 BBL/mo

Di (annual)

10.1%

b-factor

0.0

EUR

263,687 BBL

R-squared

0.314

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
1994-03 — 1995-02 MIDPAR L.P. 12 mo
1993-01 — 1994-02 AMERADA HESS CORPORATION 14 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9DPIONEER NATURAL RES. USA INC.15,3002015-01-14
8PIONEER NATURAL RES. USA INC.19,2502003-03-31
7PIONEER NATURAL RES. USA INC.19,4501995-01-13
6PIONEER NATURAL RES. USA INC.19,3001994-08-03
5PIONEER NATURAL RES. USA INC.19,3001994-03-22
242-329-00051PIONEER NATURAL RES. USA INC.------
342-329-00050PIONEER NATURAL RES. USA INC.------
442-329-10392PIONEER NATURAL RES. USA INC.------