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Logging recognition method on sedimentary microfacies of delta system and its application

Zhu Xiansheng(School of Geosciences,Yangtze University,Jingzhou 434023,China).  
Sediment microfacies are the basic sediment units in the depositional system,but the well-log curve can be reflected through the characteristics of sediment microfacies.On the basis of the key cored wells researched,we select the quantitative characteristics parameters from well-log response characteristics curve and then set up a kind of well-log sediment microfacies model of delta.Then the sediment microfacies of delta are determined according to the characteristics of log curve.This paper mostly introduces the SP curve and SHDT character to recognize the microfacies.Many of oilfields have got a very right effect in recognization of the sediment microfacies by using this method.
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