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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0002495 (1979-01-11) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 285 인용 특허 : 4 |
A well which is to produce from a heavy oil or tar sands reservoir is thermally stimulated from another well located on the order of 10 to 50 feet away. This adjacent thermal stimulation well can be considered expendable. This thermal stimulation is continued for a number of days, until the hot zone
A well which is to produce from a heavy oil or tar sands reservoir is thermally stimulated from another well located on the order of 10 to 50 feet away. This adjacent thermal stimulation well can be considered expendable. This thermal stimulation is continued for a number of days, until the hot zone produced extends beyond the location of the production well. Thereafter, the adjacent thermal stimulation well preferably is closed off during the course of the frontal thermal drive or the like from remote injection wells. However, such stimulation may be repeated later of if the oil or tar becomes too viscous in the pay zone near the production well.
A method of indirectly thermally stimulating a well to be used as a production well in a thermal frontal drive in a reservoir of heavy oil or tar sands comprising of the following steps: a. installing in said well at said reservoir a casing carrying a sand screen and installing a gravel pack around
A method of indirectly thermally stimulating a well to be used as a production well in a thermal frontal drive in a reservoir of heavy oil or tar sands comprising of the following steps: a. installing in said well at said reservoir a casing carrying a sand screen and installing a gravel pack around said screen and adjacent said reservoir, said pack extending above the top of said screen, b. drilling an adjacent thermal stimulation well into said reservoir at a spacing ranging from about 10 to about 50 feet, and cementing casing in said well to at least the lowermost contact of said well and said reservoir, c. perforating said casing of said adjacent well into said reservoir at two vertically separated zones, the lower perforations into a lower part of said reservoir and upper perforations into an upper part of said reservoir, d. separately and simultaneously flowing an aqueous divertant through said upper perforations and forcing a thermal stimulating gas chosen from the group consisting of steam or an oxygen-containing gas through said lower perforations for in the order of 10 to 90 days, to permit local heating of organic matter in said reservoir around said production well, and e. producing hot organic matter from said reservoir through said production well to increase the flow capacity of fluids between a more distant thermal frontal drive injection well and said production well.
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