YORK, W. A. 13

Oil · District 05 · Lease #1214

Operator: UNION OIL COMPANY OF CALIFORNIA

Fields: VAN

Cum Oil

731k BBL

Cum Gas

389k MCF

casinghead

Wells

11

Production

1993-01 — 2026-04

Peak Month

1993-06

Production History

Cum Oil: 731,270 BBL Cum Gas: 388,814 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

7,671 BBL/mo

Di (annual)

50.0%

b-factor

1.0

EUR

600,041 BBL

R-squared

0.745

type

hyperbolic

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 (11)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
20BASA RESOURCES, INC.33,0502026-02-27
18BASA RESOURCES, INC.23,0782021-06-25
8BASA RESOURCES, INC.23,1022016-01-07
6BASA RESOURCES, INC.13,0772005-08-08
5BASA RESOURCES, INC.13,0101994-08-31
12BASA RESOURCES, INC.13,1001990-11-09
10BASA RESOURCES, INC.13,0301990-05-03
9BASA RESOURCES, INC.13,0501989-11-08
242-467-00553BASA RESOURCES, INC.------
342-467-80108BASA RESOURCES, INC.------
442-467-00555BASA RESOURCES, INC.------