< leases

BLALOCK, J. R. -A-

Oil · District 06 · Lease #1439

Operator: SHELL WESTERN E&P INC.

Fields: QUITMAN (SUB-CLARKSVILLE)

Cum Oil

69k BBL

Cum Gas

3k MCF

casinghead

Wells

6

Production

1993-01 — 2026-03

Peak Month

1993-08

Production History

Cum Oil: 68,694 BBL Cum Gas: 2,807 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

326 BBL/mo

Di (annual)

13.5%

b-factor

0.0

EUR

29,015 BBL

R-squared

0.498

type

exponential

Operator History (from monthly production reports)

2010-04 — 2026-07 ATLAS OPERATING LLC 196 mo
2008-02 — 2010-03 PIONEER EXPLORATION, LLC 26 mo
2004-09 — 2008-01 PIONEER EXPLORATION, LTD. 41 mo
2001-11 — 2004-08 GAITHER PETROLEUM CORPORATION 34 mo
1997-06 — 2001-10 J-O'B OPERATING COMPANY 53 mo
1993-05 — 1997-05 CROSS TIMBERS OPERATING COMPANY 49 mo
1993-01 — 1993-04 SHELL WESTERN E&P INC. 4 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-499-00640ATLAS OPERATING LLC16,3431986-07-08
1142-499-30139ATLAS OPERATING LLC17,5041977-06-16
442-499-00642ATLAS OPERATING LLC------
642-499-00644ATLAS OPERATING LLC------
742-499-00645ATLAS OPERATING LLC------
9 U42-499-00647ATLAS OPERATING LLC------