SHACKELFORD E40E

Oil · District 08 · Lease #54661

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

228k BBL

Cum Gas

1.4M MCF

casinghead

Wells

1

Production

2020-04 — 2026-04

Peak Month

2021-07

Production History

Cum Oil: 227,890 BBL Cum Gas: 1,432,540 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

21,187 BBL/mo

Di (annual)

242.0%

b-factor

0.5

EUR

207,064 BBL

R-squared

0.964

type

hyperbolic

Operator History (from monthly production reports)

2020-04 — 2026-07 PIONEER NATURAL RES. USA, INC. 76 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
105HPIONEER NATURAL RES. USA, INC.310,3502019-11-14