ULMER

Oil · District 7C · Lease #11850

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

92k BBL

Cum Gas

182k MCF

casinghead

Wells

1

Production

1993-01 — 2021-01

Peak Month

2000-09

Production History

Cum Oil: 92,356 BBL Cum Gas: 182,326 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

530 BBL/mo

Di (annual)

311.6%

b-factor

0.4

EUR

3,337 BBL

R-squared

0.795

type

hyperbolic

Operator History (from monthly production reports)

1997-09 — 2024-02 PIONEER NATURAL RES. USA, INC. 318 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PIONEER NATURAL RES. USA INC.19,0501986-01-29