摘 要：
渤海海域拥有丰富的稠油资源,长期注开发使稠油储层物性发生了较大变化。通过室内试验、油藏数值模拟及测井参数解释方法对渤海Z稠油油田储层的孔隙度和渗透率2种主要物性参数进行分析,总结出了注水开发前后储层物性的变化规律。研究表明,经过长期水驱后,油田的平均孔隙半径、平均孔隙度和渗透率整体都有所增加,但表现出2种相反的变化趋势:低渗透储层孔隙度、渗透率减少;高渗透储层渗透率增加,大孔隙的数量逐渐增多。储层这2种相反的变化趋势导致储层非均质性更加严重,储层层间矛盾日益突出。
译 名：
Physical Property Variation Regularity of Reservoirs at High Water-cut Stage of Z Heavy Oil Oilfield in Bohai Bay
作 者：
HU Zhi-hua;Tianjin Branch,CNOOC Ltd;
关键词：
heavy oil field;;high water-cut stage;;reservoir property;;variation regularity
摘 要：
Heavy oil resources are rich in Bohai Bay,the properties of heavy oil reservoirs are changed after long-term water-injection development.Through the analysis of porosity,permeability,crude oil viscosity of Z Heavy-oil Oilfield,the changes of water flooding and influence between them are compared.The rule of the variation of reservoir properties before and after water injection development is summarized,and the relationship between dynamic changes of reservoir properties and reservoir production is analyzed.Studies suggest that after a long period of water flooding,the average pore radius,average porosity and permeability of the oilfield increase,but it presents two opposite trends:the permeability of high permeability reservoir increases,large pore number increases gradually;reservoir porosity,permeability in low permeability are less.The reservoirs of these two opposite trends induce more serious reservoir heterogeneity and reservoir interlayer contradiction.Crude oil properties show viscosity,resin and asphaltene content increase,interlayer contradiction is serious.
