查干凹陷下白垩统碎屑岩储层特征  

Clastic Rock Reservoir Characteristics of the Lower Cretaceous in the Chagan Sag

作　　者：高霞[1] 蒋飞虎[1] 曾令平 常俊合[1] 王亚明[1] 靳亚勤[1] 

机构地区：[1]中国石化中原油田分公司勘探开发科学研究院,濮阳457001 [2]中国石油西南油气田公司川东北气矿,达州635000

出　　处：《科学技术与工程》2014年第36期21-28,共8页Science Technology and Engineering

基　　金：国家"十二五"重大科技项目(2011ZX05006)资助

摘　　要：储层的物性特征是储油能力和产油能力的直接反映。通过岩心观察、测井资料及铸体薄片、物性和压汞等资料分析,认为查干凹陷下白垩统碎屑岩储层成分成熟度及结构成熟度均低,胶结作用强烈,储集空间孔、缝类型多样,排驱压力低,喉道分选较差,饱和度中值压力比较高,最大喉道半径比较大;但是平均喉道半径小,主要是特小孔微细喉。研究区发育5套油层,储层综合评价显示银根组最好,苏二段较好,以Ⅰ、Ⅱ类储层为主;苏一段,巴二段次之,以Ⅲ类储层为主;巴一段最差,以Ⅳ类储层为主。Based on core observation,logging data analysis,casting thin sections,physical property and mercury injection test,it is considered that both the compositional maturity and textural maturity are low,and it have strong cementation,multiple holes and seams,low displacement pressure,poorer throat sorting coefficient,higher saturation median-point pressure,bigger maximum throat radius,lower average throat radius.The throat type is mainly primary tiny pore and fine throat of the Lower Cretaceous clastic rock reservoir in the Chagan sag.There are 5 sets oil reservoirs in the area.Reservoir comprehensive evaluation shows that the reservoirs are the best in the Yin＇ gen formation,the reservoir are better and mainly Ⅰ,Ⅱ type in the 2nd member of the Suhongtu formation; followed by the reservoirs,mainly Ⅲ type,in the 1st member of the Suhongtu formation and the 2nd member of the Bayingebi formation,and the reservoirs are the worst and mainly Ⅳ type in the 1st member of the Bayingebi formation.

关 键 词：查干凹陷 碎屑岩储层 孔隙结构 物性特征 下白垩统 

分 类 号：TE122[石油与天然气工程—油气勘探]