UNIVERSITY 4-18

Oil · District 7C · Lease #18258

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

416k BBL

Cum Gas

666k MCF

casinghead

Wells

2

Production

2013-06 — 2026-04

Peak Month

2013-07

Production History

Cum Oil: 416,364 BBL Cum Gas: 666,114 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

18,501 BBL/mo

Di (annual)

721.8%

b-factor

1.2

EUR

270,286 BBL

R-squared

0.442

type

hyperbolic

Operator History (from monthly production reports)

2013-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 158 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HPIONEER NATURAL RES. USA, INC.19,0002012-12-06
2HPIONEER NATURAL RES. USA, INC.29,0002012-12-06