ESTES -D-

Oil · District 08 · Lease #31523

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

52k BBL

Cum Gas

188k MCF

casinghead

Wells

1

Production

1993-01 — 2022-12

Peak Month

1993-04

Production History

Cum Oil: 51,891 BBL Cum Gas: 188,056 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

341 BBL/mo

Di (annual)

8.6%

b-factor

0.3

EUR

58,202 BBL

R-squared

0.838

type

hyperbolic

Operator History (from monthly production reports)

1997-09 — 2025-10 PIONEER NATURAL RES. USA, INC. 338 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PIONEER NATURAL RES. USA INC.19,4001987-10-08