SHACKELFORD 40-12D

Oil · District 08 · Lease #59430

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

333k BBL

Cum Gas

607k MCF

casinghead

Wells

1

Production

2023-04 — 2026-04

Peak Month

2023-08

Production History

Cum Oil: 333,204 BBL Cum Gas: 607,238 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

17,867 BBL/mo

Di (annual)

67.8%

b-factor

0.0

EUR

316,146 BBL

R-squared

0.602

type

exponential

Operator History (from monthly production reports)

2023-04 — 2026-07 PIONEER NATURAL RES. USA, INC. 40 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HPIONEER NATURAL RES. USA, INC.110,4752022-09-07