塔里木盆地轮南地区奥陶系岩溶体系的测井分析

WELL-LOGGING ANALYSIS ON KARST SYSTEM OF ORDOVICIAN AT LUNNAN REGION OF TARIMBASIN

利用测井信息探测方法，对塔里木盆地轮南地区奥陶系上部岩溶体系进行了研究。研究表明，奥陶系上部岩溶体系在纵向上可分为上下两带；其中上带为垂直渗滤岩溶带，以溶孔、溶缝、落水洞和角砾岩为特征；下带为水平潜流岩溶带，以地下溶洞和暗河、再沉积砂岩和泥岩以及垮塌角砾岩为特征。运用双侧向测井、自然伽玛测井、高分辨率地层倾角测井、声波全波测井、井径测井、补偿密度测井、补偿中子测井以及井下声波电视测井等方法。对研究区内岩溶体系进行了探测，得到了该地区岩溶体系的测井响应特征资料。

This paper introduces a method of recognizing and analyzing karst system byusing well-logging information。Karst system developed in the upper of Ordovician of Lunnanregion of Tarim Basin,can be divided into two parts in geological section,The upper part iscalled vertical infiltration karst section characterized by solution pores, fractures, verticalsolution cavity and breacias, and the lower part is called horizontal underground solutionunderflow karst section characterized by horizontal underground solution cavity and river,resediments(sandstone and mudstone)and rockfall(breacias),By means of dual laterlog,gammalog, high resolution dipmeter tool,sonic log,compensation density log,compensationcentron log and borehole sonic television log,we can detect and recognize the karst systemand study its distribution in well section。