SWAIN, O. L. 11B

Oil // district 5 // lease#3274

op: UNION OIL COMPANY OF CALIFORNIA

cum_oil

171k BBL

cum_gas

0 MCF

wells

7

production

1993-01 — 2026-03

peak_month

1994-12

-- production_history

cum_oil: 170,767 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

3,187 BBL/mo

Di (annual)

37.4%

b-factor

0.2

EUR

127,749 BBL

R-squared

0.870

type

hyperbolic

-- wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
19UNOCAL EXPLORATION CORPORATION22,8002002-01-22
20UNOCAL EXPLORATION CORPORATION22,9002001-12-13
23UNION OIL COMPANY OF CALIFORNIA32,9002001-06-12
4UNION OIL COMPANY OF CALIFORNIA22,9242001-06-12
15UNION OIL COMPANY OF CALIFORNIA22,3152000-10-20
18UNOCAL EXPLORATION CORPORATION23,0901994-11-15
21UNOCAL EXPLORATION CORPORATION12,9001992-01-07
EOF // data source: Texas Railroad Commission // 2026