SHACKELFORD W40A

Oil · District 08 · Lease #54494

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

453k BBL

Cum Gas

1.6M MCF

casinghead

Wells

1

Production

2020-03 — 2026-04

Peak Month

2020-12

Production History

Cum Oil: 452,682 BBL Cum Gas: 1,594,326 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

27,969 BBL/mo

Di (annual)

107.4%

b-factor

0.3

EUR

446,247 BBL

R-squared

0.874

type

hyperbolic

Operator History (from monthly production reports)

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

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HPIONEER NATURAL RES. USA, INC.110,3252019-11-14