Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (3): 289-294.doi: 10.11743/ogg20060302

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Understanding exploration of marine carbonate reservoirs in South China through Sichuan basin

Ran Longhui, Xie Yaoxiang, Wang Lansheng   

  1. Southwest Oil and Gas Field Company, PetroChina, Chengdu, Sichuan 610051
  • Received:2006-05-24 Online:2006-06-25 Published:2012-01-16

Abstract:

Marine carbonate reservoirs in Sichuan basin are characterized by 5 distinct geological features,i.e.there is more gas than oil,the reservoirs are laterally and vertically superimposed,the gas pools have different sizes,there are plenty of good reservoirs though they are relatively tight as a whole,and there are various trap types but dominated by anticlinal traps. Five key problems influencing exploration of marine carbonate reservoirs that should be highlighted are presented in this paper,i.e.the development zone of marine carbonates with the features of superimposed basin,the formation and evolution of palaeohighs in the process of deposition in the craton;accurate identification of the distribution of marine carbonate reservoirs and the subsurface geometry of local structures in the formations of interest,the significant technical principles of insisting on targets but not solely on the targets,and focusing on discovery of oil and gas;as well as development of practical and advanced exploration technologies.

Key words: marine carbonates, petroleum exploration, Sichuan basin

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