MARY 18B

Oil · District 7C · Lease #18589

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

105k BBL

Cum Gas

668k MCF

casinghead

Wells

2

Production

2013-08 — 2026-02

Peak Month

2014-07

Production History

Cum Oil: 105,291 BBL Cum Gas: 667,635 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,951 BBL/mo

Di (annual)

26.8%

b-factor

0.0

EUR

87,454 BBL

R-squared

0.431

type

exponential

Operator History (from monthly production reports)

2021-02 — 2026-07 PIONEER NATURAL RES. USA, INC. 66 mo
2013-08 — 2021-01 PARSLEY ENERGY OPERATIONS, LLC 90 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PARSLEY ENERGY OPERATIONS LLC313,0002014-03-24
6PIONEER NATURAL RES. USA INC.211,8002014-01-18