< leases

KEETER

Oil · District 08 · Lease #25835

Operator: WESTAR ENERGY, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

192k BBL

Cum Gas

998k MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

2013-03

Production History

Cum Oil: 192,363 BBL Cum Gas: 997,782 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,148 BBL/mo

Di (annual)

53.8%

b-factor

0.8

EUR

190,021 BBL

R-squared

0.559

type

hyperbolic

Operator History (from monthly production reports)

2025-01 — 2026-07 DIAMONDBACK E&P LLC 19 mo
2018-09 — 2024-12 ENDEAVOR ENERGY RESOURCES L.P. 76 mo
2017-12 — 2018-08 DE3 OPERATING LLC 9 mo
2014-09 — 2017-11 DIAMONDBACK E&P LLC 39 mo
2011-09 — 2014-08 BLUESTEM ENERGY HOLDINGS, LLC 36 mo
2009-03 — 2011-08 ADVENTURE EXPLORATION PTRS, LLC 30 mo
2006-01 — 2009-02 REX ENERGY OPERATING CORP. 38 mo
1993-01 — 2005-12 WESTAR ENERGY, INC. 156 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
442-329-38844DIAMONDBACK E&P LLC112,5002013-09-30
342-329-37896DIAMONDBACK E&P LLC311,5002012-02-27
242-329-36531DIAMONDBACK E&P LLC211,0002010-02-19
142-329-01327DIAMONDBACK E&P LLC18,6501979-06-21