COREY "B"

Oil · District 7C · Lease #12835

Operator: XTO ENERGY INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

52k BBL

Cum Gas

441k MCF

casinghead

Wells

4

Production

1993-01 — 2019-12

Peak Month

1993-08

Production History

Cum Oil: 51,638 BBL Cum Gas: 441,327 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

836 BBL/mo

Di (annual)

25.3%

b-factor

0.2

EUR

49,319 BBL

R-squared

0.875

type

hyperbolic

Operator History (from monthly production reports)

2017-09 — 2025-01 XTO ENERGY INC. 89 mo

1997-09 — 2017-08 PIONEER NATURAL RES. USA, INC. 240 mo

1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo

1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1D	42-329-39790	XTO ENERGY INC.	2	5,600	2014-10-06
2	42-461-32998	XTO ENERGY INC.	1	9,250	1990-01-22
1	42-329-32204	XTO ENERGY INC.	1	9,250	1990-01-18
1A	42-461-32754	XTO ENERGY INC.	1	9,350	1988-02-12