SHACKELFORD 40-12AD

Oil · District 08 · Lease #61276

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

371k BBL

Cum Gas

759k MCF

casinghead

Wells

1

Production

2023-12 — 2026-04

Peak Month

2024-08

Production History

Cum Oil: 371,174 BBL Cum Gas: 759,097 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

32,826 BBL/mo

Di (annual)

132.4%

b-factor

0.7

EUR

801,963 BBL

R-squared

0.957

type

hyperbolic

Operator History (from monthly production reports)

2023-12 — 2026-07 PIONEER NATURAL RES. USA, INC. 32 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
30HPIONEER NATURAL RES. USA, INC.210,4752022-10-20