SHACKELFORD 40-12AB

Oil · District 08 · Lease #61184

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

429k BBL

Cum Gas

856k MCF

casinghead

Wells

1

Production

2023-12 — 2026-04

Peak Month

2024-12

Production History

Cum Oil: 429,487 BBL Cum Gas: 855,698 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

36,406 BBL/mo

Di (annual)

110.9%

b-factor

0.3

EUR

562,334 BBL

R-squared

0.946

type

hyperbolic

Operator History (from monthly production reports)

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

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
28HPIONEER NATURAL RES. USA, INC.210,4752022-10-20