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多孔介质储层表征技术应用岩心分析、测井分析、地震分析、岩样实验分析、生产动态分析等多种分析方法,表征不同尺度储集空间及其组合特征,最终评价有利储层。应用该技术,识别塔中地区北斜坡奥陶系良里塔格组孔隙型、孔洞型、孔隙-孔洞型、缝洞型和孔缝洞型5类储层,并表征了各类储层的孔喉结构、孔渗性和产能特征。结果表明:孔隙-孔洞型储层的孔喉结构发育大孔大喉的孔喉结构,优于孔隙型和孔洞型储层;裂缝对各类储层起到改善作用,裂缝的发育增加了储层孔渗性和连通性;储层产能特征受储层类型及规模影响,台缘孔缝洞型、孔隙-孔洞型储层以高产稳产为特征,台内缝洞型储层以中产较稳产为特征,台内孔洞型储层以中低产不稳产为特征。各类储集空间组合类型中,台缘孔缝洞型、孔隙-孔洞型储层是最有利储层,台内缝洞型是目前台内勘探的主要类型,台内孔隙型、孔洞型储层在裂缝发育情况下可以形成潜力储层。
Porous media reservoir characterization technology uses core analysis, well logging analysis, seismic analysis, rock sample analysis, production dynamic analysis and other analysis methods to characterize reservoir space and its combination features at different scales and ultimately evaluate favorable reservoirs. Using this technique, five types of reservoirs of pore type, pore type, pore-pore type, fracture-hole type and pore-fracture type in the Ordovician Lianglitage Formation in northern slope of Tazhong area were identified and characterized Pore throat structure, porosity and capacity characteristics. The results show that pore-throat structure of pore-pore reservoir develops pore-throat structure of macropore-throat, which is better than pore-type and pore-type reservoirs. The fractures play an improving role for various reservoirs, and the development of fractures increases Permeability and connectivity of reservoir; Reservoir productivity is affected by the type and size of reservoir. Hole-perforation and pore-pore reservoirs of the platform are characterized by high and stable production. As a feature, the hole-type reservoirs in Taiwan are characterized by medium-low yield and unstable yield. Of the various types of reservoir space combinations, the Kongyuan-dong and Kong-dong reservoirs in Taiwan are the most favorable reservoirs. The most commonly used type of reservoir-type fractures in the platform are the pore-type and pore-type reservoirs Layers can form potential reservoirs in case of fracture development.