WHIRLAWAY 99

Oil · District 08 · Lease #48022

Operator: MANTI TARKA PERMIAN OP, LLC

Cum Oil

312k BBL

Cum Gas

296k MCF

casinghead

Wells

1

Production

2016-01 — 2026-04

Peak Month

2016-06

Production History

Cum Oil: 312,037 BBL Cum Gas: 295,775 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

10,240 BBL/mo

Di (annual)

67.4%

b-factor

0.4

EUR

298,345 BBL

R-squared

0.686

type

hyperbolic

Operator History (from monthly production reports)

2022-12 — 2026-07 DIAMONDBACK E&P LLC 44 mo
2016-01 — 2022-11 MANTI TARKA PERMIAN OP, LLC 83 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HADIAMONDBACK E&P LLC113,0002015-11-24