UNIVERSITY 58-18

Oil · District 7C · Lease #17875

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

88k BBL

Cum Gas

183k MCF

casinghead

Wells

2

Production

2012-05 — 2024-06

Peak Month

2014-06

Production History

Cum Oil: 87,899 BBL Cum Gas: 182,722 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,537 BBL/mo

Di (annual)

21.7%

b-factor

0.0

EUR

84,952 BBL

R-squared

0.700

type

exponential

Operator History (from monthly production reports)

2012-05 — 2026-07 PIONEER NATURAL RES. USA, INC. 171 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PIONEER NATURAL RES. USA INC.110,8002012-02-17
2PIONEER NATURAL RES. USA INC.110,8002012-01-11