CALHOUN, T.

Oil · District 8A · Lease #68697

Operator: ULTRA OIL & GAS, INC.

Cum Oil

70k BBL

Cum Gas

0 MCF

Wells

2

Production

2004-05 — 2013-11

Peak Month

2005-12

Production History

Cum Oil: 70,038 BBL Cum Gas: 0 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,616 BBL/mo

Di (annual)

89.8%

b-factor

0.2

EUR

43,655 BBL

R-squared

0.658

type

hyperbolic

Operator History (from monthly production reports)

2016-03 — 2026-07 PINNACLE SWD TEXAS LLC 125 mo
2015-05 — 2016-02 CROSSTEX SERVICES, L.L.C. 10 mo
2009-03 — 2015-04 BLUE RIDGE RESOURCES, LLC 74 mo
2007-10 — 2009-02 TREK RESOURCES, INC. 17 mo
2004-05 — 2007-09 ULTRA OIL & GAS, INC. 41 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1BLUE RIDGE RESOURCES LLC213,0002006-09-26
2PINNACLE SWD TEXAS LLC212,5002005-07-11