E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/2
E21B 47/00 (2006.01) C09K 8/58 (2006.01) E21B 43/16 (2006.01) E21B 47/10 (2006.01)
Patent
CA 1100032
ICRs 5982 & 5988 SINGLE WELL SURFACTANT TEST TO EVALUATE SURFACTANT FLOODS USING MULTI TRACER METHOD Abstract of the Disclosure Data useful for evaluating the effectiveness of or designing an enhanced recovery process said process involving mobilizing and moving hydrocarbons through a hydrocarbon bearing subterranean formation from an injection well to a production well by injecting a mobilizing fluid into the injection well, comprising a) determining hydrocarbon saturation in a volume in the formation near a well bore penetrating formation, b) injecting sufficient mobilizing fluid to mobilize and move hydrocarbons from a volume in the formation near the well bore, and c) determining the hydrocarbon saturation in a volume including at least a part of the volume of (b) by an improved single well surfactant method comprising injecting 2 or more slugs of water containing the primary tracer separated by water slugs containing no primary tracer. Alternatively, the plurality of ester tracers can be injected in a single slug said tracers penetrating and varying distances into the formation wherein the esters have different partition coefficients and essentially equal reaction times. The single well tracer method employed is disclosed in United States Patent 3,623,842. This method designated the single well surfactant test (SWST) is useful for evaluating the effect of surfactant floods, polymer floods, carbon dioxide floods, micellar floods, caustic floods and the like in subterranean formations in much less time and at much reduced cost compared to conventional multiwell pilot tests.
312633
Continental Oil Company
Ridout & Maybee Llp
LandOfFree
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