摘要
根据大量的测井资料和铸体薄片、扫描电镜、粒度分析、压汞分析资料,对延长区长6储层特征及其主控因素进行了综合研究。研究表明:该区长6储层属中-低孔、超低渗储层,在成岩阶段后期的改造作用下,其储集条件明显变好,储集空间以粒间孔为主。储集能力格局的分布主要受沉积微相展布规律和成岩作用控制,局部发育的微观裂缝对改善储层物性有一定作用。储集性能在平面上以水下分流河道和河口坝砂体物性最好;垂向演化上受成岩作用控制,压实和胶结作用使储层物性明显变差,溶蚀作用产生的次生孔隙改善储层孔、渗性,形成有效储层。
The main controlling factors of chang6 reservoir in Yanchang area are discusses through using the log information,testing and analytical information such as Casting section,scanning electron microscope,grain size analysis and penetration et al.The results show that Chang 6 reservoir belongs middle-low hole and ultralow reservoir.The collection condition get better up and storage space up giving first place to intergranular pore under the late diagenetic stage make over effect.The distribution storing the collection ability pattern up is controlled mainly by spread law of depositing micro-face and the diagenesis.The micro-rift of part growth has the certain effect to improving reservoir property.Reservoir property of underwater distrbutary channel sandstones and debouch bar sandstones is best on plane distribution.And droop over to being controlled on evolution by diagenesis,the compaction and the cementation make reservoir nature be changed into difference obviously,the secondary pole that the dissolution produces improves the reservoir porosity and permeability,forms the effective reservoir.
出处
《内蒙古石油化工》
CAS
2011年第16期1-3,共3页
Inner Mongolia Petrochemical Industry
基金
"十一.五"国家科技支撑计划课题(2007BAB1701)
关键词
鄂尔多斯盆地
延长油区
延长组
长6储层
Ordos Basin
Yanchang Area
Yanchang Formation
reservoir characteristic
