SPEARFISH-NEAL 27

Oil · District 08 · Lease #42587

Operator: APACHE CORPORATION

Cum Oil

60k BBL

Cum Gas

329k MCF

casinghead

Wells

2

Production

2012-01 — 2026-04

Peak Month

2012-02

Production History

Cum Oil: 59,840 BBL Cum Gas: 329,314 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,136 BBL/mo

Di (annual)

52.6%

b-factor

1.1

EUR

93,821 BBL

R-squared

0.732

type

hyperbolic

Operator History (from monthly production reports)

2012-01 — 2026-07 APACHE CORPORATION 175 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1APACHE CORPORATION310,3002017-03-28
3APACHE CORPORATION111,0002011-09-28