SHIVERS, J. R. 12

Oil // district 5 // lease#3244

op: UNION OIL COMPANY OF CALIFORNIA

cum_oil

150k BBL

cum_gas

0 MCF

wells

4

production

1993-01 — 2026-03

peak_month

1994-05

-- production_history

cum_oil: 150,432 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

5,083 BBL/mo

Di (annual)

82.0%

b-factor

0.4

EUR

122,319 BBL

R-squared

0.894

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
12UNOCAL EXPLORATION CORPORATION32,5602022-02-16
11UNION OIL COMPANY OF CALIFORNIA32,9501994-03-30
13UNOCAL EXPLORATION CORPORATION12,9001991-07-29
9UNION EXPL. PARTNERS, LTD.12,4001988-02-11
EOF // data source: Texas Railroad Commission // 2026