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近年来,苏联采用了注蒸汽后利用注冷水(未加热的水)相结合的工艺。苏联认为,采用这项工艺可以降低蒸汽一油比,提高原油采收率,从而提高蒸汽驱的经济效益。据苏联一些专家分析,苏联一些油田的汽一油比要比资本主义国家蒸汽驱油田的汽一油比低,原因就在于采用了比较完善的注蒸汽与注水相结合的工艺,合理有效地利用了注入油层内的热量。例如苏联哈纳萨内(Хорасанн)油田试验区共包括4口注汽井,23口采油井,于1969年开始注蒸汽,至1976年停止注汽,7年内共注汽44.3万吨,相当于试验区孔隙体积的24%。每采出一吨原油的累积蒸汽耗量是12.8吨/吨。注蒸汽结束
In recent years, the Soviet Union has adopted a combination of steam injection and cold water injection (unheated water). The Soviet Union believes that the use of this process can reduce the steam-oil ratio and increase the recovery rate of crude oil, thereby enhancing the economic benefits of steam flooding. According to some experts in the Soviet Union, the oil-to-oil ratio of some oil fields in the Soviet Union is lower than the steam-oil ratio in steam-driven oil-producing fields in capitalist countries. The reason lies in that the relatively perfect combination of steam injection and water injection is used reasonably and effectively Injected into the reservoir of heat. For example, the Soviet Union Hananegas (Хорасанн) oilfield test area consists of 4 steam injection wells and 23 oil production wells. Steam injection started in 1969 and injection stopped in 1976. A total of 443,000 tons of steam were injected in seven years, equivalent to 24% of pore volume in the test area. The cumulative steam consumption per ton of crude produced is 12.8 tons / tonne. Note steam over