Downward migration of oil and gas can not occur

  • LI Shanpeng ,
  • WU Kai ,
  • FANG Yanbing
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  • State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

Online published: 2009-03-16

Abstract

The downward migration of oil and gas is studied. Oil and gas migrate upward or upward laterally due to buoyancy of water. The downward migration of oil and gas can not occur forever. This wrong understanding comes from the concept of undercompaction of rock. Undercompaction is a wrong concept, which is resulted from the misunderstanding of rock deformation. It is wrong using equivalent depth method to calculate the pore pressure. Faults are not the path of downward migration of oil and gas. Without the driving force, the downward migration of oil and gas take place impossibly.

Cite this article

LI Shanpeng , WU Kai , FANG Yanbing . Downward migration of oil and gas can not occur[J]. Lithologic Reservoirs, 2009 , 21(1) : 6 -10 . DOI: 10.3969/j.issn.1673-8926.2009.01.002

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