EDWARDS 14

Oil // district 10 // lease#35118

op: SUNDOWN ENERGY LP

cum_oil

192k BBL

cum_gas

0 MCF

wells

4

production

1996-09 — 2026-03

peak_month

1996-11

-- production_history

cum_oil: 192,252 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

4,375 BBL/mo

Di (annual)

61.4%

b-factor

0.7

EUR

210,090 BBL

R-squared

0.802

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
D 4SLANT OPERATING, LLC510,5002025-06-16
6COSTILLA ENERGY, INC.310,3001997-12-09
J 5COSTILLA ENERGY, INC.310,5001997-12-09
1COSTILLA PETROLEUM CORPORATION213,7501996-09-18
EOF // data source: Texas Railroad Commission // 2026