COWDEN RANCH "58"

Oil // district 10 // lease#36883

op: VANGUARD OPERATING, LLC

cum_oil

45k BBL

cum_gas

0 MCF

wells

1

production

2002-03 — 2026-03

peak_month

2002-04

-- production_history

cum_oil: 45,178 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,068 BBL/mo

Di (annual)

30.8%

b-factor

0.1

EUR

46,178 BBL

R-squared

0.911

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SOUTHWESTERN ENERGY PROD. CO.38,1002013-09-24
EOF // data source: Texas Railroad Commission // 2026