HALLEY, S. M. -B-

Oil · District 08 · Lease #35920

Operator: SHELL WESTERN E&P

Cum Oil

38k BBL

Cum Gas

449k MCF

casinghead

Wells

1

Production

1997-10 — 2024-05

Peak Month

1997-11

Production History

Cum Oil: 37,879 BBL Cum Gas: 449,156 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

393 BBL/mo

Di (annual)

61.7%

b-factor

0.4

EUR

12,381 BBL

R-squared

0.565

type

hyperbolic

Operator History (from monthly production reports)

2022-04 — 2026-07 BASIN OIL & GAS OPERATING, LLC 52 mo
2021-07 — 2022-03 MECO IV HOLDCO, LLC 9 mo
2015-09 — 2021-06 MECO IV, LLC 70 mo
2012-10 — 2015-08 SHELL WESTERN E&P 35 mo
2003-12 — 2012-09 CHESAPEAKE OPERATING, INC. 106 mo
1999-10 — 2003-11 KERR-MCGEE OIL & GAS ONSHORE LLC 50 mo
1999-04 — 1999-09 KERR-MCGEE CORPORATION 6 mo
1997-10 — 1999-03 ORYX ENERGY COMPANY 18 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
23BASIN OIL & GAS OPERATING, LLC211,3251997-09-11