GRAHAM

Oil // district 13 // lease#19436

op: STAMPER OPERATING CO., INC.

cum_oil

70k BBL

cum_gas

0 MCF

wells

3

production

1993-01 — 2026-03

peak_month

2002-07

-- production_history

cum_oil: 69,711 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

239 BBL/mo

Di (annual)

5.3%

b-factor

0.0

EUR

50,520 BBL

R-squared

0.519

type

exponential

-- wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SIERRA EXPLORATION CO.25,0001981-11-06
4SIERRA EXPLORATION CO.14,9501979-08-07
2SIERRA EXPLORATION CO.14,8001979-04-18
EOF // multi-state drilling data platform // 2026