YORK, W. A. 13

Oil · District 05 · Lease #3169

Operator: UNION OIL COMPANY OF CALIFORNIA

Cum Oil

477k BBL

Cum Gas

1.0M MCF

casinghead

Wells

11

Production

1993-01 — 2026-04

Peak Month

1994-12

Production History

Cum Oil: 476,591 BBL Cum Gas: 1,038,791 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

10,250 BBL/mo

Di (annual)

86.4%

b-factor

0.5

EUR

272,193 BBL

R-squared

0.895

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
18BASA RESOURCES, INC.23,0782021-06-25
16BASA RESOURCES, INC.22,9002005-04-22
17BASA RESOURCES, INC.22,4052005-03-30
14BASA RESOURCES, INC.22,9002005-03-28
11BASA RESOURCES, INC.23,2502002-10-04
1BASA RESOURCES, INC.32,9442002-04-09
19BASA RESOURCES, INC.12,5501994-10-13
5BASA RESOURCES, INC.13,0101994-08-31
15BASA RESOURCES, INC.12,9001992-01-22
13BASA RESOURCES, INC.12,9001991-07-29
7BASA RESOURCES, INC.12,3301989-02-24