STUDY ON THE MECHANISM OF ORGANIC INCLUSION IN THE FRAGMENTAL RESERVOIR
Zhang Zhijian; Zhang Wenhuai (China University of Geosciences,Wuhan)
The mechanism of organic inclusions may be quite different from that of inorganic inclusions,the organic inclusions may be mainly formed from the process of oil-rock interaction. A study on the new mechanism,this paper shows that the inclusions within the cracks,secondary enlargement edges of quartz and between minerals in the fragmental resevoirs are the result of oil-rock interaction. They are formed when oil and gas, especially the carboxylic acid anions in them dissolve quartz,aluminosilicate and carbonate and form a certain space in which oil and gas infill.Inclusions in different occurrences are actually the different forms of the same process that takes place in the different structures of a rock.Our study is significant to the reservoir geochemistry,the mechanism of fluid inclusion and application of organic inclusions in exploration and evaluation of oil and gas resource.