VAN,SW LEWISVILLE UNIT

Oil · District 05 · Lease #1943

Operator: UNION OIL COMPANY OF CALIFORNIA

Cum Oil

1.1M BBL

Cum Gas

129k MCF

casinghead

Wells

68

Production

1993-01 — 2026-04

Peak Month

1994-12

Production History

Cum Oil: 1,063,121 BBL Cum Gas: 128,761 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

7,382 BBL/mo

Di (annual)

12.1%

b-factor

0.3

EUR

950,826 BBL

R-squared

0.938

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 (68)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6803BASA RESOURCES, INC.12,9992004-01-09
4202BASA RESOURCES, INC.12,2002001-02-23
4405BASA RESOURCES, INC.12,4501997-04-21
4406BASA RESOURCES, INC.23,2161997-03-25
4201BASA RESOURCES, INC.13,0171995-10-11
4204BASA RESOURCES, INC.12,9771995-08-23
4211BASA RESOURCES, INC.13,2701994-10-13
4716BASA RESOURCES, INC.13,0111988-06-23
6809BASA RESOURCES, INC.13,5001981-03-06
6614BASA RESOURCES, INC.13,0001981-02-23
4407BASA RESOURCES, INC.13,0001979-11-21
6808BASA RESOURCES, INC.13,0001979-11-16
125142-467-00960BASA RESOURCES, INC.------
125242-467-00959BASA RESOURCES, INC.------
125342-467-00957BASA RESOURCES, INC.------
125442-467-00961BASA RESOURCES, INC.------
1255W42-467-00958BASA RESOURCES, INC.------
126142-467-00962BASA RESOURCES, INC.------
126442-467-00963BASA RESOURCES, INC.------
420642-467-00971BASA RESOURCES, INC.------
420742-467-00981BASA RESOURCES, INC.------
420842-467-30103BASA RESOURCES, INC.------
440142-467-00969BASA RESOURCES, INC.------
440242-467-00946BASA RESOURCES, INC.------
440342-467-00944BASA RESOURCES, INC.------
471242-467-01140BASA RESOURCES, INC.------
471742-467-00886BASA RESOURCES, INC.------
472042-467-30106BASA RESOURCES, INC.------
472142-467-30104BASA RESOURCES, INC.------
472242-467-30141BASA RESOURCES, INC.------
660142-467-00888BASA RESOURCES, INC.------
660242-467-00892BASA RESOURCES, INC.------
660342-467-00891BASA RESOURCES, INC.------
660442-467-00890BASA RESOURCES, INC.------
660642-467-00893BASA RESOURCES, INC.------
660742-467-00889BASA RESOURCES, INC.------
660842-467-00896BASA RESOURCES, INC.------
660942-467-00895BASA RESOURCES, INC.------
661042-467-00897BASA RESOURCES, INC.------
661142-467-00894BASA RESOURCES, INC.------
661242-467-30055BASA RESOURCES, INC.------
661342-467-30063BASA RESOURCES, INC.------
670142-467-00899BASA RESOURCES, INC.------
670442-467-00904BASA RESOURCES, INC.------
670742-467-00898BASA RESOURCES, INC.------
670842-467-30105BASA RESOURCES, INC.------
680142-467-00942BASA RESOURCES, INC.------
680242-467-00947BASA RESOURCES, INC.------
680442-467-00943BASA RESOURCES, INC.------
680542-467-00948BASA RESOURCES, INC.------
680642-467-01292BASA RESOURCES, INC.------
680742-467-30107BASA RESOURCES, INC.------
690142-467-00955BASA RESOURCES, INC.------
690242-467-00953BASA RESOURCES, INC.------
690342-467-00952BASA RESOURCES, INC.------
690442-467-00951BASA RESOURCES, INC.------
690542-467-00954BASA RESOURCES, INC.------
690642-467-00949BASA RESOURCES, INC.------
690742-467-00950BASA RESOURCES, INC.------
690842-467-00956BASA RESOURCES, INC.------
700142-467-00934BASA RESOURCES, INC.------
700242-467-00941BASA RESOURCES, INC.------
700342-467-00938BASA RESOURCES, INC.------
7004W42-467-00939BASA RESOURCES, INC.------
700542-467-00935BASA RESOURCES, INC.------
700742-467-01300BASA RESOURCES, INC.------
700842-467-00936BASA RESOURCES, INC.------
700942-467-00937BASA RESOURCES, INC.------