TUBB 21 U UNIT

Oil · District 08 · Lease #48850

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

2.4M BBL

Cum Gas

2.9M MCF

casinghead

Wells

3

Production

2017-01 — 2026-04

Peak Month

2017-10

Production History

Cum Oil: 2,366,103 BBL Cum Gas: 2,855,230 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

113,334 BBL/mo

Di (annual)

249.1%

b-factor

1.1

EUR

3,086,946 BBL

R-squared

0.932

type

hyperbolic

Operator History (from monthly production reports)

2017-01 — 2026-07 PIONEER NATURAL RES. USA, INC. 115 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HPIONEER NATURAL RES. USA, INC.211,0002016-05-31
4HPIONEER NATURAL RES. USA, INC.211,0002016-05-31
6HPIONEER NATURAL RES. USA, INC.211,0002016-05-31