Application of Electrokinetics for Enhanced Oil Recovery - Electrokinetics for Petroleum and Environmental Engineers - page 137

Table 3.5 Lloydminster Heavy Oil Belt (Alberta, Canada) comparison of
DCEOR Field demonstration to baseline field performance (after Wittle et al.,
2008c)

Item Baseline Production DCEOR Production

Production Rate (BOPD) 1.32 5.78

Water Cut (%) 31 2.8

Oil API Gravity NA N/A

Gas Production (SCFPD) Nil Minimal

Produced Gas Energy
Content (BTU/SCF)

- -

H2S Content (ppm) None None

Viscosity (cps@ 100°C) 10,275 6,230

cut, compared with baseline values of 1.32 bbl/day and 31 % water cut.
This was a 4.38 fold production increase with a 91 % water cut reduction.
The fluid level in a nearby observation well also rose approximately 60m,
when the DCEOR system was activated. The oil production efficiency was
approximately 23.7 BTU/Incremental bbl produced. This DCEOR pro-
duction efficiency value was comparable to steam flood for this shallow,
heavy oil field.

3.10.3 Golfo San Jorge Basin (Santa Cruz, Argentina)

DCEOR Field Demonstration

The Golfo San Jorge Basin DCEOR Field demonstration was conducted
over a period of 51 days (Stainoh, 2011). Golfo San Jorge Basin reservoirs
are interbeded fluvial Cenozoic tuffaceous sandstones (Sylwan, 2001).
The Golfo San Jorge Basin field demonstration reservoir was a 20m
(66 ft) thick consolidated, braided stream sand at a depth of approximately
820m (2,706 ft) BGS. The well used for this DCEOR demonstration was a
former field production well converted without any modifications to be the
DCEOR cathode and production well. Baseline production was approxi-
mately 11.46 bbl/day, 15.17° API gravity (heavy) oil with a 96% BS&W cut,
on pump.
Table 3.6 summarizes the Golfo San Jorge Basin DCEOR field dem-
onstration. Average DCEOR production was 69.79 bbl /day with a 61 %