鄂尔多斯盆地姬塬地区长6_1储层成岩相半定量划分研究

Semi-quantitative Classification of Diagenetic Facies of Chang 6_1 Reservoir of Jiyuan Block in Ordos Basin

在目前国内外成岩相研究基础上,结合实际,提出了据孔隙类型、面孔率及主要孔隙填隙物进行成岩相半定量划分命名的方法。总体思路是,当储层面孔率较高时,以主要的孔隙类型来命名成岩相,反映储层物性好的主因。而储层面孔率较低时,如果填隙物含量高,以主要填隙物命名;而当填隙物总量较低时,则表明压实作用为面孔率低的主要成因,命名为机械压实相。具体针对姬塬地区长6油层组储层特征,提出了一套据面孔率、主要孔隙类型及填隙物进行划分的标准和方案,通过该方法划分成岩相,实现了成岩相半定量划分。

On the basis of internall and external study of diagenetic facies,a new method was proposed for diagenetic facies for semi-quantitative classification and denomination according to the pore type,surface pore ratio and main pore packing materials.When the surface pore ratio was higher,the denomination was performed according to the main pore types,it reflected the main reason of good reservoir property.When the surface pore ratio was lower,if the content of packing material was higher,the denomination was performed according to the main packing material.If the total content of packing material was lower,it indicated that the compaction was the main reason for the lower surface pore ratio,then the denomination was mechanical compaction facies.According to the features of Chang 6reservoir in Jiyuan Area,a set of classifying criteria and plan of the main pore types and packing materials are proposed.This new method is used to realize the semi-quantitative classification of diagenetic facies.