HIRSCH "F"

Oil · District 7C · Lease #4254

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

194k BBL

Cum Gas

585k MCF

casinghead

Wells

9

Production

1993-01 — 2023-05

Peak Month

2003-08

Production History

Cum Oil: 194,121 BBL Cum Gas: 585,188 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,706 BBL/mo

Di (annual)

18.7%

b-factor

0.3

EUR

149,832 BBL

R-squared

0.670

type

hyperbolic

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
1993-12 — 1995-02 MIDPAR L.P. 15 mo
1993-01 — 1993-11 GRAHAM ROYALTY, LTD. 11 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10PIONEER NATURAL RES. USA INC.29,5002003-01-30
8PIONEER NATURAL RES. USA INC.29,5002003-01-30
9PIONEER NATURAL RES. USA INC.29,5002003-01-30
7PIONEER NATURAL RES. USA INC.19,3001985-05-15
5PIONEER NATURAL RES. USA INC.18,7001984-07-17
6PIONEER NATURAL RES. USA INC.18,7001984-07-17
4PIONEER NATURAL RES. USA INC.18,7001983-12-29
B 142-461-18700PIONEER NATURAL RES. USA INC.------
B 242-461-13300PIONEER NATURAL RES. USA INC.------