CO2混相驱模糊综合筛选评价方法研究

Study on the Comprehensive Assessment of CO_2 Miscible Flooding

从CO_2驱替机理入手,选取对注气效果影响显著的油藏参数作为综合筛选评价指标,结合近年来国内外油藏CO_2混相驱筛选标准,引入模糊集合隶属度和权重,建立模糊综合评价方法。利用该方法对目前国内外9个典型油藏进行模糊综合评价,确定其注CO_2混相驱的潜力,并基于该方法建立油藏注CO_2混相驱适宜度的评价标准。实例证明该方法具有科学性和系统性,对油藏实际生产具有指导意义。

This paper formulated a fuzzy comprehensive evaluation method combined with membership function of fuzzy set and weight. We began our research from the displacement mechanism, selected the synthetic evaluation indexes of the reservoir parameter that has significant influences on CO2 flooding and refered the screening criteria of the CO2 miscible flooding of reservoirs at home and abroad. Nine typical reservoirs were evaluated with this meth- od to detect the potential of the oil productivity by using the CO2 miscible flooding ; meanwhile, an evaluation crite- ria of the suitability of the CO2 miscible flooding was established in this paper based on this method. Examples have proved that the method is scientific and systematic, so it has a profound guiding significance to the actual produc- tion of the oil reservoir.