SHACKELFORD E40A

Oil · District 08 · Lease #54638

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

248k BBL

Cum Gas

1.5M MCF

casinghead

Wells

1

Production

2020-03 — 2026-04

Peak Month

2021-03

Production History

Cum Oil: 247,738 BBL Cum Gas: 1,465,684 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

20,867 BBL/mo

Di (annual)

297.5%

b-factor

0.7

EUR

242,855 BBL

R-squared

0.902

type

hyperbolic

Operator History (from monthly production reports)

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

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
101HPIONEER NATURAL RES. USA, INC.310,3502019-11-14