CHADBOURNE RANCH 431

Oil · District 7C · Lease #12804

Operator: WOLCOTT, ED OPERATING

Cum Oil

34k BBL

Cum Gas

38k MCF

casinghead

Wells

1

Production

1993-01 — 2000-06

Peak Month

1995-07

Production History

Cum Oil: 33,670 BBL Cum Gas: 37,639 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,449 BBL/mo

Di (annual)

80.2%

b-factor

0.2

EUR

27,027 BBL

R-squared

0.902

type

hyperbolic

Operator History (from monthly production reports)

2006-08 — 2011-05 ENERVEST OPERATING, L.L.C. 58 mo
2003-11 — 2006-07 MAK-J ENERGY PARTNERS(TX),LTD. 33 mo
2001-10 — 2003-10 ST. MARY ENERGY COMPANY 25 mo
1995-05 — 2001-09 PITTENCRIEFF AMERICA, INC. 77 mo
1993-01 — 1995-04 WOLCOTT, ED OPERATING 28 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2ENERVEST OPERATING L.L.C.35,8001990-03-29