Stability and Formation Mechanism Analysis of Secondary Migration
Pathway of Hydrocarbon

doi:10.11885/j.issn.1674-5086.2013.08.11.05

Abstract

Abstract:

Abstract：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.

Key words: Key words：secondary migration, preferential migration pathway, wettability, stability, migration and accumulation efficiency

Jiang Lin1，2, Bao Dongmei1, Hong Feng1，2, Hao Jiaqing1，2, Fan Yang1，2，3. Stability and Formation Mechanism Analysis of Secondary Migration
Pathway of Hydrocarbon[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.08.11.05.

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