GRANDSTAFF, GEORGE

Oil // district 9 // lease#12567

op: TKP PETROLEUM, INC.

cum_oil

2k BBL

cum_gas

0 MCF

wells

3

production

1993-01 — 2026-03

peak_month

1994-03

-- production_history

cum_oil: 2,405 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

55 BBL/mo

Di (annual)

15.3%

b-factor

0.2

EUR

5,178 BBL

R-squared

0.409

type

hyperbolic

-- wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6ENCINO OPERATING COMPANY, INC.22,1501990-04-27
5ENCINA CORPORATION22,4001989-12-22
3SANDIA OPERATING CORP.11,9001987-10-14
EOF // data source: Texas Railroad Commission // 2026