【摘要】 在薄片、岩心观察及物性资料统计的基础上,对准噶尔盆地阜东斜坡区侏罗系三工河组砂岩的岩石学、沉积学和储层物性特征及其主要控制因素进行了详细研究。结果表明,阜东斜坡区储层的沉积微相和物性分别为:辫状河三角洲前缘水下分流河道微相,孔隙度平均值达到12.79%,渗透率平均值为17.61×10^-3μm²;辫状河三角洲前缘席状砂微相,孔隙度平均值达到8.71%,渗透率平均为0.078×10^-3μm²;辫状河三角洲前缘水下分流河道间微相,其孔隙度平均值为5.79%,渗透率平均值为0.34×10^-3μm²。此外,泥质杂基含量和后期成岩作用等对三工河组储层的形成也具有重要影响,其中泥质杂基含量越高,储层物性越差;成岩作用则主要以破坏性的压实作用为主。综合阜东斜坡区三工河组沉积微相及其储层特征研究认为沉积微相对储层起主要控制作用,成岩作用为辅。其中,辫状河三角洲前缘水下分流河道微相物性最好,辫状河三角洲前缘席状砂微相物性次之,辫状河三角洲前缘水下分流河道间微相物性较差。更多还原

【Abstract】 Based on the observation of thin sections and cores as well as physical properties,the characteristics of the rock,sedimentology,reservoir and controlling factors of sandstones in Jurassic Sangonghe Formation in the eastern Fukang Slope were studied in detail.These show that the average porosity is up to12.79% and average permeability is 17.61×10^-3μm² for underwater distributary channel micro-facies of braided river delta front;the average porosity reaches 8.71%and average permeability 0.078×10^-3μm² for braided river delta front sheet sand micro-facies;the proportion of the average is 5.79%and average permeability 0.34×10^-3μm² for braided river delta front underwater distributary inter-channel,respectively.Otherwise,the proportion of muddy matrix and diagenesis effect deeply on the reservoir physical property too,while higher content of matrix,lower physical property,and diagenesis referring mainly to compaction.All results interpret that the reservoir physical properties for underwater distributary channel micro-facies of braided river delta front is the best,the reservoir physical properties for braided river delta front sheet sand micro-facies are medium,and braided river delta front underwater distributary inter-channel micro-facies is the lowest,which may become available reservoir.更多还原