COOK "21"

Oil · District 08 · Lease #39126

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

341k BBL

Cum Gas

371k MCF

casinghead

Wells

9

Production

2008-11 — 2025-10

Peak Month

2013-11

Production History

Cum Oil: 341,371 BBL Cum Gas: 370,633 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,488 BBL/mo

Di (annual)

47.0%

b-factor

0.8

EUR

301,163 BBL

R-squared

0.709

type

hyperbolic

Operator History (from monthly production reports)

2023-06 — 2026-07 OVINTIV USA INC. 38 mo
2017-06 — 2023-05 PETROLEGACY ENERGY II, LLC 72 mo
2008-11 — 2017-05 PIONEER NATURAL RES. USA, INC. 103 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8OVINTIV USA INC.111,7902013-07-16
7OVINTIV USA INC.111,8002012-10-24
5OVINTIV USA INC.111,9252012-08-15
6OVINTIV USA INC.111,0002012-03-07
4OVINTIV USA INC.210,8502011-03-04
3OVINTIV USA INC.111,0002010-11-03
1DOVINTIV USA INC.16,0002009-01-30
2OVINTIV USA INC.211,2002009-01-22
1OVINTIV USA INC.19,8002008-06-28