YORK, J. D. ESTATE

Oil · District 7C · Lease #12012

Operator: PIONEER EXPLORATION, LTD.

Cum Oil

21k BBL

Cum Gas

23k MCF

casinghead

Wells

5

Production

1993-01 — 2008-12

Peak Month

1993-03

Production History

Cum Oil: 20,816 BBL Cum Gas: 22,503 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

307 BBL/mo

Di (annual)

17.4%

b-factor

0.0

EUR

21,178 BBL

R-squared

0.534

type

exponential

Operator History (from monthly production reports)

2010-04 — 2014-02 ATLAS OPERATING LLC 47 mo
2008-02 — 2010-03 PIONEER EXPLORATION, LLC 26 mo
2001-07 — 2008-01 PIONEER EXPLORATION, LTD. 79 mo
1998-04 — 2001-06 PIONEER EXPLORATION COMPANY 39 mo
1993-01 — 1998-03 JACO OIL & GAS CO. 63 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7ATLAS OPERATING LLC15,5001986-06-04
5PETRUS OPERATING CO. INC.14,4501985-05-24
4PETRUS OPERATING CO. INC.14,2501984-11-01
3PETRUS OPERATING CO. INC.14,2001984-06-18
2PETRUS OPERATING CO. INC.14,4001983-11-03