川西地区须家河组裂缝成因类型及形成期次的成像测井分析

On the Origin Types and Formation Periods of Fractures in Xujiahe Formation in West Sichuan Region

通过对川西地区须家河组大量的电成像及岩心资料的详细分析,识别出了研究区域裂缝成因的类型,主要包括构造缝、后期成岩改造缝、非构造成因缝等。对裂缝形成期次进行了探讨,认为研究区域裂缝至少存在3个期次,分别为北西最早、其次为北东、北东东向裂缝最晚,且走向为北东东向的裂缝为该区域最有利勘探方位。

According to analysing a large mount of the electro imaging logging and drilling core datum in Xujiahe formation in West Sichuan region, the genetic types mainly including structural fractures, the filling and solution characteristics of fractures and non-structural genetic fractures are recognized, the formation periods of the fractures are divided into NE, NW and NEE. We think that the fracture of NW is early-eracking, the fracture of NE is second and the fractures of NEE is the last. And the fracture of NEE is the most favorable exploratory area.