GLASS, GEORGE W. "21"

Oil // district 10 // lease#29593

op: VENCER ENERGY, LLC

cum_oil

161k BBL

cum_gas

0 MCF

wells

6

production

1993-01 — 2026-03

peak_month

1999-07

-- production_history

cum_oil: 161,344 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

843 BBL/mo

Di (annual)

8.4%

b-factor

0.0

EUR

118,017 BBL

R-squared

0.755

type

exponential

-- wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5COSTILLA PETROLEUM CORPORATION210,0001999-04-22
3COSTEX RESOURCES, INC.19,5001985-10-03
4COSTEX RESOURCES, INC.19,5001985-10-03
1DCOSTEX RESOURCES, INC.15,0001985-08-30
2COSTEX RESOURCES, INC.19,7001985-01-03
1COSTEX RESOURCES, INC.19,7001984-11-26
EOF // data source: Texas Railroad Commission // 2026