Oil & Gas Geology ›› 2016, Vol. 37 ›› Issue (4): 457-463.doi: 10.11743/ogg20160401

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Secondary oil migration distance and hydrocarbon accumulation in carbonate rocks

Zhou Bo1, Jin Zhijun1, Yun Jinbiao1, Bai Guoping2   

  1. 1. Exploration & Production Research Institute, SINOPEC, Beijing 100083, Chian;
    2. China University of Petroleum(Beijing), Beijing 102249, China
  • Received:2015-02-03 Revised:2016-06-20 Online:2016-08-08 Published:2016-09-06

Abstract: In this paper,we statistically analyzed the secondary hydrocarbon migration distances of 229 large carbonate oil and gas fields within the major petroliferous basins in the world.It is found that the secondary hydrocarbon migration distances and number of oil/gas fields within carbonate migration systesms show no exponential decay relationship as the clastic migration systems.Carbonate reservoirs are generally proximal to source rocks.However,for reservoirs distal to source rocks,the migration distance has no obvious control on the probability of hydrocarbon accumulation.For reservoirs distal to source rocks,oil and gas distribution are generally controlled by the distribution pattern of faults and the distribution range of carbonate reservoirs of vuggy-cavernous type.Given sufficient hydrocarbon supply,the possibility of hydrocarbon accumulation remains almost consistent with such a range.Therefore,even at a long distance,as long as it is within the distribution range of faults and reservoir rocks of the vuggy-cavernous type,the probability of hydrocarbon accumulation can be relatively high.

Key words: migration distance, secondary migration, carbonate rock, reservoir accumulation

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