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普光地区长兴组和飞仙关组碳酸盐岩储层孔隙度与渗透率之间没有严格通用的数学关系,导致储层渗透率计算具有很大困难.通过对该地区测井资料、常规薄片、铸体薄片和岩心物性等资料进行分析,表明碳酸盐岩孔隙类型是影响孔渗关系的主要因素.基于常规测井资料构造出对孔隙结构比较敏感的测井特征:声波时差与密度比值和深浅侧向电阻率比值,可用于对该地区碳酸盐岩孔隙类型进行识别,再针对不同的孔隙类型建立相应的孔渗关系模型,用于计算该地区储层渗透率.实例资料处理结果表明,模型计算渗透率与岩心分析渗透率符合较好,且井间规律具有一致性,基于孔隙结构建立的储层孔隙度与渗透率模型能较好地确定储层渗透率.
There is no strict universal mathematical relationship between porosity and permeability of carbonate reservoirs in Changxing Formation and Feixianguan Formation in Puguang area, which makes it difficult to calculate reservoir permeability.Based on the well logging data in this area, , The thin sections of castings and the physical properties of cores are analyzed.The results show that the pore types of carbonate rocks are the main factors affecting the pore-water infiltration relationship.On the basis of conventional well logging data, logging features sensitive to pore structure are constructed: the ratio of acoustic jet lag to density And the depth of the lateral resistivity ratio can be used to identify carbonate pore types in the region, and then for different pore types to establish the corresponding porosity and permeability model used to calculate the permeability of the reservoir.Examples Data processing results It is shown that the calculated permeability of the model complies well with the permeability of the core analysis, and the consistency between the wells is consistent. The reservoir porosity and permeability model established based on the pore structure can well determine the permeability of the reservoir.