FOSTER, W. L., JR., -B-

Oil // district 10 // lease#4666

op: XOG OPERATING LLC

cum_oil

40k BBL

cum_gas

0 MCF

wells

10

production

1993-01 — 2026-03

peak_month

1993-01

-- production_history

cum_oil: 39,840 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

384 BBL/mo

Di (annual)

12.1%

b-factor

0.0

EUR

38,137 BBL

R-squared

0.685

type

exponential

-- wells (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
18 UUNION OIL COMPANY OF CALIFORNIA23,2001989-02-17
19 UUNION OIL COMPANY OF CALIFORNIA23,2001988-12-22
21 UUNION OIL COMPANY OF CALIFORNIA13,0001987-05-19
22 UUNION OIL COMPANY OF CALIFORNIA13,0001987-05-19
23WUNION OIL COMPANY OF CALIFORNIA13,0001987-05-19
20 UUNION OIL COMPANY OF CALIFORNIA13,2001986-09-29
5UNION OIL COMPANY OF CALIFORNIA11,3941983-10-25
242-431-00517--------
342-431-00518--------
442-431-00519--------
EOF // multi-state drilling data platform // 2026