STUBBLEFIELD "26"

Oil · District 08 · Lease #38635

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

115k BBL

Cum Gas

146k MCF

casinghead

Wells

2

Production

2008-01 — 2025-11

Peak Month

2016-04

Production History

Cum Oil: 114,594 BBL Cum Gas: 146,368 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,717 BBL/mo

Di (annual)

29.3%

b-factor

0.1

EUR

78,003 BBL

R-squared

0.574

type

hyperbolic

Operator History (from monthly production reports)

2008-01 — 2026-07 PIONEER NATURAL RES. USA, INC. 223 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PIONEER NATURAL RES. USA INC.111,1752014-03-03
1PIONEER NATURAL RES. USA INC.110,5002007-07-16