< leases

ROCKER B '16'

Oil · District 7C · Lease #14667

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

49k BBL

Cum Gas

232k MCF

casinghead

Wells

2

Production

1997-10 — 2015-02

Peak Month

1998-01

Production History

Cum Oil: 49,075 BBL Cum Gas: 232,054 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,738 BBL/mo

Di (annual)

149.6%

b-factor

0.9

EUR

52,223 BBL

R-squared

0.915

type

hyperbolic

Operator History (from monthly production reports)

2014-12 — 2015-04 DISCOVERY NATURAL RESOURCES LLC 5 mo
2008-01 — 2014-11 PIONEER NATURAL RES. USA, INC. 83 mo
2006-05 — 2007-12 CIMAREX ENERGY CO. OF COLORADO 20 mo
2004-11 — 2006-04 GRUY PETROLEUM MANAGEMENT CO. 18 mo
1999-10 — 2004-10 NADEL AND GUSSMAN PERMIAN,L.L.C. 61 mo
1998-04 — 1999-09 CHESAPEAKE OPERATING, INC. 18 mo
1997-10 — 1998-03 HUGOTON ENERGY CORPORATION 6 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-383-34866DISCOVERY NATURAL RESOURCES LLC17,2001997-10-16
142-383-34825DISCOVERY NATURAL RESOURCES LLC17,2001997-08-04