摘要
工区储层属于典型的低孔、低渗储层,物性较差,储层非均质性严重,目前对储层沉积微相类型不确定.为了更有效的开发该区块,从区域地质资料出发,利用岩心颜色、沉积遗迹构造、岩心粒度特征及古生物标志等岩心相标志,结合测井曲线形态特征,对正270区长6地层的沉积微相进行了研究.研究表明,正270井区发育三角洲前缘亚相,发育的沉积微相有水下分流河道、水下分流间湾、水下天然堤,并且水下分流河道微相砂体是本区占主导地位的骨架砂体.同时探讨了研究区沉积相和油气成藏的关系,为进一步勘探和开发目的层提供了地质线索.
The reservoir is a typical low porosity and low permeability reservoir with poor physical properties,and the heterogeneity of the reservoir is serious. At present,the type of sedimentary micro-facies of the reservoir is uncertain. In order to develop the block more effectively,starting from regional geological data,by using the core facies markers of core color,sedimentary trace structure,core grain size and paleontological markers,combined with the morphological characteristics of logging curves,the sedimentary micro-facies of Chang 6 formation in Zheng 270 area are studied. The study shows that the delta front subfacies in the 270 well area is developed,and the sedimentary micro-facies are underwater distributary channel,underwater distributary bay and underwater natural dike,and the subaqueous distributary channel micro-facies sand body is the dominant skeleton sand body in this area. At the same time,the relationship between sedimentary facies and hydrocarbon accumulation in the study area is discussed,which provides geological clues for further exploration and development of the target level.
作者
孙明
SUN Ming(Zhidan Oil Production Plant, Shaanxi Yanehang Petroleum（Group） Company Limited, Zhidan 717500, China)
出处
《西安文理学院学报（自然科学版）》
2018年第4期113-117,共5页
Journal of Xi’an University(Natural Science Edition)
关键词
沉积微相
三角洲前缘亚相
长6储层
志丹油田
sedimentary micro-facies
delta front subfacies
Chang 6 reservoir
Zhidan oilfield
