ULVESTAD-BIRKHEAD E20I

Oil · District 08 · Lease #51893

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

327k BBL

Cum Gas

1.2M MCF

casinghead

Wells

1

Production

2019-02 — 2026-04

Peak Month

2019-05

Production History

Cum Oil: 326,833 BBL Cum Gas: 1,241,606 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

18,803 BBL/mo

Di (annual)

204.5%

b-factor

0.9

EUR

436,787 BBL

R-squared

0.927

type

hyperbolic

Operator History (from monthly production reports)

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

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9HPIONEER NATURAL RES. USA, INC.110,4502018-07-17