鄂尔多斯盆地麻黄山地区宁东3井区延8段储层特征研究

Research on reservoirs characteristics of 8^(th) member of YanAN formation,NingDong 3 well field,MaHuangShan area,Ordos basin

本文针对鄂尔多斯盆地麻黄山地区宁东3井区的勘探开发前景,为寻找有利储层,从130个岩石薄片的分析鉴定入手,对侏罗系延安组延8段的沉积特征、岩石学特征、储层物性特征及储集空间类型进行研究,认为井区为一套三角洲平原水下分流河道沉积,岩性以岩屑长石砂岩夹长石石英砂岩为主,并偶夹有长石岩屑砂岩及长石砂岩。孔隙类型以粒间孔隙为主,但常被高岭石集合体充填。孔隙度平均值约14.12%,渗透率平均值约80×1-0 3μm2。通过对沉积微相、成岩相与储层之间关系的分析,认为它们对储层发育还是有利的。

Focusing on the exploration & development prospect of NingDong 3 well field MaHuangShan area,Ordos basin.and for the sake of finding favorable reservoirs,this thesis starts from analysing and identifying about 130 rock thin sections,has researched the sedimentation characteristics、petrologic characteristics、reservoirs physical properties and reservoirs space characteristics,getting some conclusions that the sedimentary type of NingDong 3 well field is underwater distributary channel sedimentation,Delta pla...