碳酸盐岩缝洞型油藏溶蚀孔洞分类建模  

Differential Modeling of Dissolved Vugs in Carbonate Fracture and Vug Reservoirs

作　　者：李红凯[1] 康志江[1] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083

出　　处：《特种油气藏》2015年第5期50-54,153,共5页Special Oil & Gas Reservoirs

基　　金：国家重点基础研究发展计划("973"计划)"碳酸盐岩缝洞型油藏开采机理及数值模拟研究"(2011CB202404)

摘　　要：碳酸盐岩缝洞型油藏储集空间类型主要为大型溶洞、溶蚀孔洞及裂缝。根据溶蚀孔洞成因不同,采用分类建模的方法分别建立不同成因溶蚀孔洞的地质模型。溶洞垮塌引起的溶蚀孔洞采用多点地质统计学建模方法,断裂周围发育的溶蚀孔洞采用断裂约束分区建模方法,风化壳表层层状溶蚀孔洞采用岩溶相控建模方法,揭示了不同成因溶蚀孔洞空间分布特征,提高了溶蚀孔洞地质建模的精度,并通过塔河油田S80缝洞单元的应用,预测了其有利储集体发育带及井间连通关系,验证了该建模方法的实用性。The reservoir space types of carbonate fracture and vug oil reservoirs mainly consist of large cave,dissolved vug and fracture. Based on the origins of dissolved vugs,differential modeling method was used to build the geologic models of different origins of dissolved vugs respectively. Multipoint geostatistic modeling method was used for dissolved vug resulted from cavern collapse,fracture constrained zoning modeling method was used for dissolved vug developed around the fault,and karst facies controlled modeling method was used for the layered dissolved vug of weathered crust surface layer,revealing the spatial distribution characteristic of different origins of dissolved vugs and improving the geologic modeling accuracy of them. After applied in S80 fracture- cavity unit of the Tahe Oilfield,the favorable reservoir development zone and inter- well communication relation were predicted,and the practicality of this modeling method was verified.

关 键 词：缝洞型碳酸盐岩 分类建模 溶蚀孔洞 相控建模 多点地质统计学 

分 类 号：TE122.2[石油与天然气工程—油气勘探]