CALVERLEY, J. C.

Oil · District 08 · Lease #6409

Operator: RSP PERMIAN, LLC

Fields: SPRABERRY (TREND AREA)

Cum Oil

23k BBL

Cum Gas

99k MCF

casinghead

Wells

2

Production

1993-01 — 2018-01

Peak Month

1994-05

Production History

Cum Oil: 22,605 BBL Cum Gas: 98,756 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

130 BBL/mo

Di (annual)

5.9%

b-factor

0.0

EUR

25,131 BBL

R-squared

0.613

type

exponential

Operator History (from monthly production reports)

2018-08 — 2020-04 COG OPERATING LLC 21 mo

2017-01 — 2018-07 RSP PERMIAN, LLC 19 mo

2003-10 — 2016-12 JM COX RESOURCES, L.P. 159 mo

1993-01 — 2003-09 COX, JOHN L. 129 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-173-32026	COG OPERATING LLC	1	9,000	1988-03-11
3	42-173-00471	COG OPERATING LLC	--	--	--