ULVESTAD-BIRKHEAD E20G

Oil · District 08 · Lease #51891

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

369k BBL

Cum Gas

700k MCF

casinghead

Wells

1

Production

2019-02 — 2026-04

Peak Month

2019-09

Production History

Cum Oil: 368,760 BBL Cum Gas: 700,307 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

17,300 BBL/mo

Di (annual)

122.5%

b-factor

0.3

EUR

242,011 BBL

R-squared

0.716

type

hyperbolic

Operator History (from monthly production reports)

2019-02 — 2026-07 PIONEER NATURAL RES. USA, INC. 90 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7HPIONEER NATURAL RES. USA, INC.110,4502018-07-27