RICHEY SEC. 42 "A"

Oil · District 7C · Lease #8491

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

51k BBL

Cum Gas

736k MCF

casinghead

Wells

9

Production

1993-01 — 2024-01

Peak Month

2006-12

Production History

Cum Oil: 51,451 BBL Cum Gas: 735,958 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

858 BBL/mo

Di (annual)

46.1%

b-factor

0.2

EUR

27,785 BBL

R-squared

0.889

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
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
13PIONEER NATURAL RES. USA INC.17,5002006-08-31
9PIONEER NATURAL RES. USA INC.17,4002006-04-20
10PIONEER NATURAL RES. USA INC.17,4002006-04-19
7PIONEER NATURAL RES. USA INC.17,3002005-11-18
8PIONEER NATURAL RES. USA INC.17,4252005-11-10
4PIONEER NATURAL RES. USA INC.17,4001981-02-18
3PIONEER NATURAL RES. USA INC.17,4001980-11-05
2PIONEER NATURAL RES. USA INC.17,3001980-02-05
542-235-31835PIONEER NATURAL RES. USA INC.------