Environmental Engineering Reference
In-Depth Information
3.10.1
Santa Maria Basin (California, USA) DCEOR Field
Demonstration
The Santa Maria Basin, California (USA) field DCEOR demonstrations,
including breaks for data analyses and laboratory testing, lasted over 6
years. Figure 3.22 shows a typical short-term field production test. Within
five days of initiating DCEOR, the daily production rate improved approx-
imately tenfold.
The Santa Maria Basin demonstration reservoir was a 100-ft thick
unconsolidated sand at a depth of approximately 2,800 ft below ground
surface (BGS). Prior
unsuccessful EOR technologies
had included steam-
flood and cyclic (Huff and Puff) ) steam injection.
Table 3.2 summarizes the Santa Maria Basin field DCEOR performance,
compared to the baseline production. DCEOR increased the oil produc-
tion by an order of magnitude (10-fold). At the same time:
• The water cut dropped to about 25% of the baseline
performance
•
API Gravity increased from 8.1° to 10.7°
•
Oil viscosity decreased significantly, with the DCEOR pro-
duced crude viscosity only about 41% of the baseline value
•
Gas production essentially doubled from the baseline value,
with DCEOR
Figure 3.22
Santa Maria Basin (California, USA) short-term DCEOR demonstration,
(after Wittle and Hill, 2006a & 2006b; Wittle et al., 2008a, 2008b, 2008c, 2011)
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