川中合川地区低阻气层测井识别研究  

Well-logging Identification of Low-resistivity Gas Reservoirs in Hechuan Area,Central Sichuan Basin

作　　者：李强[1] 杨斌[1] 雍自权[1] 符伟兵[1] 吕新东[1] 

机构地区：[1]"油气藏地质及开发工程"国家重点实验室.成都理工大学,四川成都610059

出　　处：《天然气技术》2009年第6期44-46,79,共3页NATURAL GAS TECHNOLOGY

摘　　要：川中合川地区上三叠统须二段气藏存在大量的低阻气层,使用常规测井方法很难将这些气层识别出来。为此分别使用双孔隙度重叠法和纵横波速度比值法对研究区进行流体判别,尤其是使用后者在识别低阻气层时避开了电阻率的影响。在前面两种方法的基础上加入常规测井系列,建立起气水识别多元判别模型。经过实际应用检验,证明该模型适用于合川须二段低阻气层测井识别。In Hechuan area of central Sichuan Basin, there are a lot of low-resistivity gas reservoirs existing in Upper Triassic Xujiahe 2 Member. And it’s difficult to identify these reservoirs by means of conventional well-logging methods. So far, two methods of both dual porosity overlapping and P-S wave velocity ratio have been used to identify the fluids of studied area. Especially, the P-S wave velocity ratio method may not only avoid an impact of resistivity on identification but also improve an identification effect. In this study, combining the two methods with conventional well-logging ways, a multiple model to identify gas and water is developed. A test to the model illustrates that it can be applied to Xujiahe 2 Member gas reservoir with low resistivity.

关 键 词：低阻气层 双孔隙度重叠法 纵横波速度比 多元判别 

分 类 号：P618.13[天文地球—矿床学]