SHACKELFORD 40-12AC

Oil · District 08 · Lease #61628

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

340k BBL

Cum Gas

1.2M MCF

casinghead

Wells

1

Production

2024-02 — 2026-04

Peak Month

2024-09

Production History

Cum Oil: 340,217 BBL Cum Gas: 1,209,718 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

42,266 BBL/mo

Di (annual)

412.6%

b-factor

1.1

EUR

785,542 BBL

R-squared

0.948

type

hyperbolic

Operator History (from monthly production reports)

2024-02 — 2026-07 PIONEER NATURAL RES. USA, INC. 30 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
29HPIONEER NATURAL RES. USA, INC.210,4752022-10-20