FRYSAK

Oil // district 10 // lease#28518

op: COSTILLA PETROLEUM CORPORATION

cum_oil

181 BBL

cum_gas

0 MCF

wells

4

production

1993-01 — 1994-03

peak_month

1993-02

-- production_history

cum_oil: 181 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

53 BBL/mo

Di (annual)

378.3%

b-factor

0.0

EUR

168 BBL

R-squared

0.786

type

exponential

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6L & B OIL CO. INC.110,1001985-06-28
4L & B OIL CO. INC.110,1001985-02-04
2L & B OIL CO. INC.111,3001984-06-29
1L & B OIL CO. INC.111,0351983-07-13
EOF // data source: Texas Railroad Commission // 2026