CAJ | 학술논문

鄂尔多斯盆地超低渗透油藏资源丰富,但由于其储层物性差,非均质性强,导致开发难度加大。通过对沉积微相与成岩相的综合研究认为：在超低渗透储层背景下存在相对高孔、高渗区,三角洲前缘水下分流河道微相与辫状浊积水道微相碎屑分选较好,杂基含量较低,成岩早期压实胶结作用相对较弱,孔隙保存较好;成岩后期地下流体运动较活跃,溶蚀、溶解作用加强,为相对有利的储集相带。深入研究超低渗透储层的成因,对优选油气相对富集区,促进超低渗透油藏的有效开发提供了理论依据。
악이다사분지초저삼투유장자원봉부,단유우기저층물성차,비균질성강,도치개발난도가대。통과대침적미상여성암상적종합연구인위：재초저삼투저층배경하존재상대고공、고삼구,삼각주전연수하분류하도미상여변상탁적수도미상쇄설분선교호,잡기함량교저,성암조기압실효결작용상대교약,공극보존교호;성암후기지하류체운동교활약,용식、용해작용가강,위상대유리적저집상대。심입연구초저삼투저층적성인,대우선유기상대부집구,촉진초저삼투유장적유효개발제공료이론의거。
The resources of ultra-lowpermeability reservoir are abundant,but for the poor reservoir properties and strong heterogeneity,the development is difficult.According to comprehensive research of sedimentary microfacies and diagenetic facies,it is suggested that there are areas with relatively high porosity and high permeability in ultra-low permeability reservoirs.Due to the good clastic sorting,low content of matrix and poor compaction and cementation during the early diagenetic stage,pores can be well preserved.For the active fluid motion,intensive denudation and dissolution in the later diagenetic stage,delta front subsea distributary channel microfacies and braided turbidite channel microfacies are the favorable reservoir facies belt.This cognition is significant for optimizing hydrocarbon enrichment area and promoting economic development of ultra-lowpermeability reservoir.