E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/29
E21B 43/28 (2006.01)
Patent
CA 1138330
ABSTRACT A thermal acidization and recovery process for increas- ing production of heavy viscous petroleum crude oil and synthetic fuels from subterranean hydrocarbon formations containing clay particles creating adverse permeability effects is described. The method comprises injecting a thermal vapor stream through a well bore penetrating such formations to clean the formation face of hydrocarbonaceous materials which restrict the flow of fluids into the petro- leum-bearing formation. Vaporized hydrogen chloride is then injected simultaneously to react with calcium and magnesium salts in the formation surrounding the bore hole to form water soluble chloride salts. Vaporized hydrogen fluoride is then injected simultaneously with its thermal vapor to dissolve water-sensitive clay particles thus increasing permeability. Thereafter, the thermal vapors are injected until the formation is sufficiently heated to permit increased recovery rates of the petroleum.
363919
Carmel Energy Inc.
George H. Riches And Associates
LandOfFree
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