TUBB 21 L UNIT

Oil · District 08 · Lease #49140

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

1.2M BBL

Cum Gas

3.3M MCF

casinghead

Wells

3

Production

2017-06 — 2026-04

Peak Month

2017-09

Production History

Cum Oil: 1,203,349 BBL Cum Gas: 3,281,071 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

77,223 BBL/mo

Di (annual)

287.3%

b-factor

0.7

EUR

928,427 BBL

R-squared

0.835

type

hyperbolic

Operator History (from monthly production reports)

2017-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 110 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HPIONEER NATURAL RES. USA, INC.211,0002016-05-31
3HPIONEER NATURAL RES. USA, INC.211,0002016-05-31
5HPIONEER NATURAL RES. USA, INC.211,0002016-05-31