GEORGE W. GLASS -24-

Oil // district 10 // lease#29736

op: VENCER ENERGY, LLC

cum_oil

175k BBL

cum_gas

0 MCF

wells

11

production

1993-01 — 2026-03

peak_month

1997-05

-- production_history

cum_oil: 174,931 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,112 BBL/mo

Di (annual)

85.5%

b-factor

0.8

EUR

87,370 BBL

R-squared

0.783

type

hyperbolic

-- wells (11)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10COSTILLA ENERGY, INC.110,0001997-03-11
7COSTILLA PETROLEUM CORPORATION110,0001996-11-12
8COSTILLA PETROLEUM CORPORATION110,0001996-11-12
9COSTILLA PETROLEUM CORPORATION110,0001996-11-12
5COSTEX RESOURCES, INC.19,5001985-10-03
6COSTEX RESOURCES, INC.19,5001985-10-03
4COSTEX RESOURCES, INC.19,5001985-09-09
3COSTEX RESOURCES, INC.19,7001985-02-26
2COSTEX RESOURCES, INC.19,7001985-01-03
1COSTEX RESOURCES, INC.19,7001984-12-11
1DCOSTEX RESOURCES, INC.19,7001984-12-11
EOF // data source: Texas Railroad Commission // 2026