Oil & Gas Geology ›› 2013, Vol. 34 ›› Issue (2): 236-241.doi: 10.11743/ogg20130215

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Control of continent-continent collision on hydrocarbon generation in South Asia

Wu Yiping, Pan Xiaohua, Tian Zuoji, Fa Guifang, Li Fuheng, Hou Ping   

  1. 1.PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
  • Received:2012-05-18 Revised:2013-01-20 Online:2013-04-28 Published:2013-05-02

Abstract:

The main body of the South Asian region is the Indian Plate,which was a part of the East Gondwanaland during the Rift Period (4570-166Ma) and then drifted from south to north for a long distance after the Late Jurassic (166Ma).Since the Eocene (49Ma),the Plate began subducting towards the Eurasian Plate,causing the Himalayas and India-Myanmar Mountains rapidly uplifting from the Early Miocene (16Ma) to the present and the formation of five tectonic units.The passive margin sedimentary in northern Indian Plate had been destroyed in the pre-Late Cretaceous,while the east,west and southern parts of the Plate were subjected only to minor elevation and denudation,therefore hydrocarbons there were better preserved.During the Rift Period,the interior of the Plate only experienced weak subsidence,and during the late Collision Period,hydrocarbon source rocks were immature.Hydrocarbons were mainly concentrated in the passive continental margin,the foreland basins,the fore/back arc basins and the aborted rift systems along the edge of the Indian Plate,with the Meso-Cenozoic sedimentary rocks as the main reservoirs.Typical hydrocarbon migration and accumulation patterns are thought to be the composite sandbody's pattern,fold-thrust pattern,the fault-depression pattern and the fault-lithological pattern.

Key words: continent-continent collision, tectonic evolution, tectonic unit, migration and accumulation pattern, hydrocarbon accumulation pattern, Indian Plate

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