MCMASTER "D"

Oil · District 7C · Lease #11521

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

18k BBL

Cum Gas

399k MCF

casinghead

Wells

1

Production

1993-01 — 2023-03

Peak Month

1993-01

Production History

Cum Oil: 18,215 BBL Cum Gas: 399,435 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

93 BBL/mo

Di (annual)

5.8%

b-factor

0.0

EUR

18,337 BBL

R-squared

0.443

type

exponential

Operator History (from monthly production reports)

2021-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 62 mo
2018-09 — 2021-05 DE3 OPERATING LLC 33 mo
2003-10 — 2018-08 JM COX RESOURCES, L.P. 179 mo
1993-01 — 2003-09 COX, JOHN L. 129 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PIONEER NATURAL RES. USA INC.18,3001985-04-26