三角洲体系沉积微相的测井识别方法与应用

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

沉积微相是沉积体系中最基本的沉积单元,而它的沉积特征可以通过测井曲线来反映。在关键井岩心研究的基础上,从测井响应曲线中提取有用的特征参数,建立一种三角洲测井沉积微相模式。比照测井区的测井曲线特征,进而划分判定三角洲沉积微相。文中主要介绍用SP(自然电位)测井曲线和SHDT(地层倾角)测井的特征进行微相识别。很多油田应用该方法在识别沉积微相方面取得了非常好的效果。

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.