摘要
通过野外露头、测井资料、岩心观察、分析化验等资料,系统研究鄂尔多斯盆地南部不同类型浊积岩与油藏的关系。研究发现,鄂尔多斯盆地南部延长组长6主要由长石砂岩组成,长石岩屑砂岩次之;重力流的类型可分为滑塌沉积、砂质碎屑流沉积和浊流沉积3种类型。控制不同类型浊积岩储层油藏的因素主要有:成熟度高的烃源岩是油藏形成的物质基础;地震等构造运动是沉积储层形成的诱发机制;压实作用和胶结物充填使储层物性变差,而溶蚀作用使储层物性变好;下薄上厚的叠置浊积砂体为油藏提供储集条件;裂缝为成藏提供有利二次运移通道;盖层发育特征是决定油藏的核心。研究对鄂尔多斯盆地不同地区、不同层位浊积岩油藏具有一定指导意义,对其他盆地浊积岩油藏也有一定的参考意义。
Based on field outcrops,logging data,core observations and core analysis tests,the relationship between different types of turbidites and oil reservoirs were systematically studied in the Southern Ordos Basin.The results show that mainly feldspathic sandstones and feldspar lithic sandstones of Chang 6 in the Yanchang Formation;gravity flow types are divided into three types：slump deposits,sandy debris flow deposits and turbidity deposits.There are factors controlling of oil reservoir of turbidites：high-mature source rocks are the
material basis for reservoir formation;earthquakes are induced mechanisms for the formation of sedimentary reservoirs;compaction and cement filling are the reservoir properties,and the dissolution results in the improvement of reservoir physical properties;
the upside turbidite sandbodies thicker than underpart,provided reservoir conditions for oil reservoir.The crack provide the favorable channels for secondary migration for reservoir formation;cap rock is the core of the decision reservoir.The study are certain guiding significance for turbidite reservoirs in different regions and different layers in Ordos Basin,also be used as a reference for turbidite reservoirs in other basins.
作者
李克永
LI Ke-yong(College of Geology and Environment,Xi＇an University of science and Technology,Xi＇an 710054,China;Periodical Center,Xi＇an University of Science and Technology,Xi＇an 710054,China)
出处
《西安科技大学学报》
CAS
北大核心
2018年第4期620-628,共9页
Journal of Xi’an University of Science and Technology
基金
国家科技重大专项专题(2017ZX05005002-004)
国家自然科学基金(41502107)
陕西省自然科学基础研究计划项目(2013JQ5009)
