油气二次运移通道稳定性及其成因机制  

Stability and Formation Mechanism Analysis of Secondary Migration Pathway of Hydrocarbon

作　　者：姜林[1,2] 薄冬梅[1] 洪峰[1,2] 郝加庆[1,2] 樊阳[1,2,3] 

机构地区：[1]中国石油勘探开发研究院,北京海淀100083 [2]"盆地构造与油气成藏"重点实验室.中国石油天然气集团公司,北京海淀100083 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《西南石油大学学报（自然科学版）》2014年第3期54-58,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2011ZX05003–001);中国石油科技项目(2011B–04);中国石油勘探开发研究院院级项目(2011Y–004)

摘　　要：烃源岩生成的油气要经过一定距离的二次运移后才能在有效的圈闭中聚集成藏,因此油气二次运移的过程对于油气最终聚集率有很大的影响。原油的二次运移过程可分为活塞式和优势式,天然气二次运移是一种由活塞式和优势式两种基本运移方式组成的断续式运移。二次运移模式的不同导致了油气运移路径的稳定性存在差异,采用染色煤油和氮气分别进行二次运移过程物理模拟实验,通过多次充注的方式探讨油气二次运移通道稳定性,并结合油气水物性特征差异及其与孔隙岩石的关系分析了其成因机制。认为原油二次运移过程中形成比较稳定的运移通道,运移效率较高;天然气二次运移过程中形成一种动态的相对稳定的运移通道,运移散失量较大。In order to accumulate in effective trap,hydrocarbon generated form source rocks has to go through a certain distance of secondary migration,therefore the process of hydrocarbon secondary migration has a great influence on ultimate hydrocarbon accumulation rate. The secondary migration process of crude oil can be divided into two types：piston pattern and advantage pattern;the secondary migration of gas is an intermittent migration process composed of piston pattern and advantage pattern. The difference of secondary migration pattern leads to the differences in the migration pathway stability between oil and gas. This study used dyed kerosene and nitrogen to conduct physical simulation experiment of secondary migration process respectively,and discussed secondary migration pathway stability of oil and gas through way of more than one filling,and analyzed its formation mechanism in view of the different physical characteristics between oil,gas and water and the relation of the difference to porosity of reservoir rock. In our opinion,a fairly stable migration pathway could be formed in the process of oil secondary migration,so its transport efficiency is higher;natural gas forms a relatively stable dynamic migration pathway in the process of secondary migration,the loss amount while migrating is larger.

关 键 词：二次运移 优势通道 润湿性 稳定性 运聚效率 

分 类 号：TE122.1[石油与天然气工程—油气勘探]