UNIVERSITY 1-28

Oil · District 7C · Lease #18438

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

190k BBL

Cum Gas

364k MCF

casinghead

Wells

1

Production

2013-09 — 2025-11

Peak Month

2013-11

Production History

Cum Oil: 189,871 BBL Cum Gas: 363,650 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

6,643 BBL/mo

Di (annual)

58.5%

b-factor

0.4

EUR

222,229 BBL

R-squared

0.693

type

hyperbolic

Operator History (from monthly production reports)

2013-09 — 2026-07 PIONEER NATURAL RES. USA, INC. 155 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HPIONEER NATURAL RES. USA INC.18,5002012-12-27