TUNNELL

Oil · District 08 · Lease #31792

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

59k BBL

Cum Gas

60k MCF

casinghead

Wells

1

Production

1993-01 — 2012-12

Peak Month

1993-05

Production History

Cum Oil: 59,184 BBL Cum Gas: 59,701 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

552 BBL/mo

Di (annual)

10.6%

b-factor

0.0

EUR

62,469 BBL

R-squared

0.706

type

exponential

Operator History (from monthly production reports)

1997-09 — 2014-02 PIONEER NATURAL RES. USA, INC. 198 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PIONEER NATURAL RES. USA INC.19,1751987-12-21