致密气藏岩石毛细管自吸特征研究  

RESEARCH ON CAPILLARY IMBIBITION CHARACTER IN TIGHT GAS RESERVOIR

作　　者：董波[1] 兰林[2] 陈智晖[2] 夏海英[2] 牛静[2] 

机构地区：[1]中国石化西南油气分公司工程监督中心 [2]中国石化西南油气分公司工程技术研究院

出　　处：《钻采工艺》2012年第6期34-36,8-9,共3页Drilling & Production Technology

基　　金：中国石化科学技术研究开发项目"川西深井提高钻速关键技术研究"(编号:GJ-49-0509)部分研究成果

摘　　要：致密气藏岩石具有孔喉细小、毛细管压力高、水相圈闭损害严重等特征。为此,利用岩心夹持器、摄像头、计量管组装了岩心自吸损害评价装置,利用该装置研究了大邑地区须家河组岩石的自吸特征,并进一步研究了岩石气相渗透率与含水饱和度之间的关系。结果表明,研制的岩心自吸评价装置能有效用于评价储层岩样的自吸特征;致密气藏的自吸速率随渗透率增加而增加,拐点的含水饱和度也随之增加;致密气藏储层毛管自吸效应是产生水相圈闭损害的重要方式,同一渗透率级别的岩样自吸拐点和气相渗透率为零点的含水饱和度区间基本一致。There are many characters about tight gas reservoir,such as fine pore throat,high capillary pressure,aqueous phase trap.A core imbibition damage appraisement apparatus was established through the usage of core holder,camera,and dip stool.The imbibition characteristics of rock were researched in Xujiahe group,Dayi area.The relation between gas phase permeability and salt water saturation was researched.Results demonstrated the appraisement apparatus could appraise imbibitions characteristic of rock effectively.Imbibition rate of tight gas reservoir would increase with the increase of permeability,at the same time,the water saturation of inflection point would increase.Capillary imbibition is important way for tight gas reservoir to yield water phase trap.The core imbibition inflexion and salt water saturation zone of gas phase permeability is accordant.

关 键 词：钻井 完井 毛细管自吸 水相圈闭 渗透率 自吸速率 实验 

分 类 号：TE311[石油与天然气工程—油气田开发工程]