< leases

ROCKER B '21'

Oil · District 7C · Lease #14711

Operator: PIONEER NATURAL RES. USA, INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

22k BBL

Cum Gas

107k MCF

casinghead

Wells

2

Production

1997-12 — 2018-10

Peak Month

2006-07

Production History

Cum Oil: 22,243 BBL Cum Gas: 106,984 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

278 BBL/mo

Di (annual)

35.6%

b-factor

0.4

EUR

14,943 BBL

R-squared

0.765

type

hyperbolic

Operator History (from monthly production reports)

2008-01 — 2026-07 PIONEER NATURAL RES. USA, INC. 223 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
1997-12 — 1998-03 HUGOTON ENERGY CORPORATION 4 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-383-35691PIONEER NATURAL RES. USA INC.18,2002006-01-09
142-383-34870PIONEER NATURAL RES. USA INC.17,2001997-10-16