SANDEFUR "37A"

Oil · District 08 · Lease #40158

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

37k BBL

Cum Gas

58k MCF

casinghead

Wells

1

Production

2010-05 — 2021-06

Peak Month

2010-07

Production History

Cum Oil: 37,158 BBL Cum Gas: 57,978 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

787 BBL/mo

Di (annual)

31.0%

b-factor

0.3

EUR

42,805 BBL

R-squared

0.679

type

hyperbolic

Operator History (from monthly production reports)

2021-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 62 mo
2018-09 — 2021-05 DE3 OPERATING LLC 33 mo
2010-05 — 2018-08 ENDEAVOR ENERGY RESOURCES L.P. 100 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ENDEAVOR ENERGY RESOURCES L.P.317,0002009-12-17