SWINK 390

Oil · District 10 · Lease #8419

Operator: HIGHMARK ENERGY OPERATING, LLC

Cum Oil

45k BBL

Cum Gas

364k MCF

casinghead

Wells

1

Production

2011-04 — 2024-06

Peak Month

2011-07

Production History

Cum Oil: 44,706 BBL Cum Gas: 364,241 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,190 BBL/mo

Di (annual)

140.9%

b-factor

0.4

EUR

44,962 BBL

R-squared

0.875

type

hyperbolic

Operator History (from monthly production reports)

2022-02 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 54 mo
2011-04 — 2022-01 EOG RESOURCES, INC. 130 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HHIGHMARK ENERGY OPERATING LLC19,0002010-10-21