MARY 18

Oil · District 7C · Lease #18593

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

935k BBL

Cum Gas

4.9M MCF

casinghead

Wells

8

Production

2013-11 — 2026-04

Peak Month

2014-07

Production History

Cum Oil: 934,575 BBL Cum Gas: 4,893,030 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

22,696 BBL/mo

Di (annual)

38.4%

b-factor

0.0

EUR

710,000 BBL

R-squared

0.882

type

exponential

Operator History (from monthly production reports)

2021-02 — 2026-07 PIONEER NATURAL RES. USA, INC. 66 mo
2013-11 — 2021-01 PARSLEY ENERGY OPERATIONS, LLC 87 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4208HPIONEER NATURAL RES. USA, INC.19,5002015-10-12
1HBPIONEER NATURAL RES. USA, INC.19,0002014-07-02
8PIONEER NATURAL RES. USA, INC.212,5002014-05-12
7PIONEER NATURAL RES. USA, INC.211,8002014-04-09
1PIONEER NATURAL RES. USA, INC.213,0002014-03-24
5PIONEER NATURAL RES. USA, INC.211,8002014-01-03
4PIONEER NATURAL RES. USA, INC.211,8002013-12-12
3PIONEER NATURAL RES. USA, INC.213,0002013-09-27