SHACKELFORD 40-12F

Oil · District 08 · Lease #59427

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

489k BBL

Cum Gas

1.4M MCF

casinghead

Wells

1

Production

2023-02 — 2026-04

Peak Month

2023-08

Production History

Cum Oil: 489,395 BBL Cum Gas: 1,440,613 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

25,859 BBL/mo

Di (annual)

64.1%

b-factor

0.0

EUR

484,350 BBL

R-squared

0.729

type

exponential

Operator History (from monthly production reports)

2023-02 — 2026-07 PIONEER NATURAL RES. USA, INC. 42 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6HPIONEER NATURAL RES. USA, INC.210,4752022-08-31