COWDEN RANCH '58'

Oil // district 10 // lease#44649

op: VANGUARD OPERATING, LLC

cum_oil

24k BBL

cum_gas

0 MCF

wells

1

production

2013-10 — 2023-11

peak_month

2013-11

-- production_history

cum_oil: 24,442 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

745 BBL/mo

Di (annual)

37.4%

b-factor

0.0

EUR

23,845 BBL

R-squared

0.631

type

exponential

-- wells (1)

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