SHACKELFORD W40D

Oil · District 08 · Lease #54433

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

499k BBL

Cum Gas

1.4M MCF

casinghead

Wells

1

Production

2020-03 — 2026-04

Peak Month

2020-12

Production History

Cum Oil: 499,250 BBL Cum Gas: 1,408,084 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

13,084 BBL/mo

Di (annual)

34.6%

b-factor

0.0

EUR

453,251 BBL

R-squared

0.479

type

exponential

Operator History (from monthly production reports)

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

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HPIONEER NATURAL RES. USA, INC.110,3252019-11-14