SHACKELFORD W40E

Oil · District 08 · Lease #54493

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

402k BBL

Cum Gas

1.1M MCF

casinghead

Wells

1

Production

2020-03 — 2026-04

Peak Month

2022-01

Production History

Cum Oil: 401,631 BBL Cum Gas: 1,115,517 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

15,786 BBL/mo

Di (annual)

55.8%

b-factor

0.0

EUR

339,773 BBL

R-squared

0.715

type

exponential

Operator History (from monthly production reports)

2020-03 — 2026-07 PIONEER NATURAL RES. USA, INC. 77 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5HPIONEER NATURAL RES. USA, INC.110,3252019-11-14