SWAIN, D. L. 11 -AC-

Oil · District 05 · Lease #2087

Operator: UNION OIL COMPANY OF CALIFORNIA

Fields: VAN

Cum Oil

850k BBL

Cum Gas

438k MCF

casinghead

Wells

7

Production

1993-01 — 2026-04

Peak Month

1997-04

Production History

Cum Oil: 850,458 BBL Cum Gas: 437,514 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,384 BBL/mo

Di (annual)

4.9%

b-factor

0.0

EUR

755,616 BBL

R-squared

0.680

type

exponential

Operator History (from monthly production reports)

2021-01 — 2026-07 BASA RESOURCES, INC. 67 mo
1993-01 — 2020-12 UNION OIL COMPANY OF CALIFORNIA 336 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
25BASA RESOURCES, INC.12,9502004-08-05
3BASA RESOURCES, INC.12,8942004-06-04
6BASA RESOURCES, INC.12,9512002-09-18
12BASA RESOURCES, INC.13,0001985-08-21
142-467-00512BASA RESOURCES, INC.------
542-467-00506BASA RESOURCES, INC.------
942-467-30038BASA RESOURCES, INC.------