鄂尔多斯盆地富县探区西南部长6浊积岩储层特征及控制因素分析

Characteristics of Chang6 Formation Turbidite Reservoirs and Its Influence Factors in Southwest Fuxian County of Ordos Basin

通过研究区内大量岩心铸体薄片及物性等资料分析,对富县地区西南部延长组主要产油层组长6储集层的岩石学特征、物性特征及孔隙类型等进行了研究,分析了储层特征及其影响储层储集性能的主要控制因素。结果表明:研究区延长组长6储层为三角洲前缘滑塌浊积岩,岩性以浅灰色、灰色中~厚层细粒长石砂岩为主,含少量岩屑质长石砂岩,岩石学特征相似。孔隙类型以粒间孔、长石溶孔、岩屑溶孔和微裂隙为主。沉积环境、成岩作用是影响该区储集层物性的主要因素。

By analyzing data of drilling cores,costing thin sections as well as physical property,petrology characteristics,characteristics of pore and permeability and porosity types were studied,and reservoir characteristics and influences factors were also analyzed about Chang 6 oil-bearing bed in southwest Fuxian county.The result indicates that Chang 6 reservoir is turbidity and has petrology characteristics of lower mineral maturity and high structure maturity.It has porosity types of primal grain porosity and secondary pore.The sedimentary environment and digenesis were all factors to influence the reservoir.