摘要
双城油区延长组长6油层组是横山地区主要的产油层。在砂岩薄片、铸体薄片、扫描电镜等资料分析的基础上,结合沉积相和孔隙结构研究,确定导致横山双城油区储层致密化的主要成岩作用是压实作用和胶结作用,原生孔隙的大量丧失和胶结物大量充填粒间残余孔是造成储层低孔、低渗的主要原因,成岩早期强烈的压实作用和胶结作用对形成复杂的低孔、低渗储层起到了决定性作用。在此基础上划分出5个成岩相类型,对研究油气的分布与富集起到了辅助作用。
Chang 6 reservoir of Upper Triassic in Shuangcheng oil region is the major oil producing zone in Hengshan area. Based on the analysis of cast slice, scanning electronic microscope and other test data, combined with sedimentary facies and pore structure, it is determined that the main diagenesis which cause the reservoir compacted are compaction and cementation. The great loss of primary pore and cement filling in intergranular residual pore are the main causes for low porosity and low permeability of the reservoir. The complex reservoir with low porosity and low permeability is dominated by the strong compaction and cementation in the early diagenesis stage. Five types of diagenetic facies are divided, which is helpful for the study on hydrocarbon distribution and enrichment.
出处
《岩性油气藏》
CSCD
2011年第2期70-74,共5页
Lithologic Reservoirs
关键词
长6油层组
成岩作用
成岩相
横山双城油区
鄂尔多斯盆地
Chang 6 reservoir
diagenesis
diagenetic facies
Shuangcheng oil region in Hengshan area
Ordos Basin
