POWELL "19"

Oil // district 9 // lease#10154

op: GRIFFIN PETROLEUM COMPANY

cum_oil

168k BBL

cum_gas

0 MCF

wells

4

production

1993-01 — 2026-03

peak_month

2011-09

-- production_history

cum_oil: 168,372 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,727 BBL/mo

Di (annual)

40.6%

b-factor

0.6

EUR

104,774 BBL

R-squared

0.689

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
13COG OPERATING LLC110,7002011-04-29
2 XLACY & BYRD, INC.211,3201989-12-07
1LACY & BYRD, INC.18,7501983-06-10
3LACY & BYRD, INC.210,3001982-11-01
EOF // data source: Texas Railroad Commission // 2026