最优化变尺度法在汶川科学钻探岩性识别中的应用  

On Lithology Identification by Optimization Variable Scale Method in Wenchuan Scientific Drilling

作　　者：王智[1] 潘和平[1] 杜婷[1] 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074

出　　处：《测井技术》2014年第3期348-354,共7页Well Logging Technology

基　　金：国家科技专项汶川地震断裂带科学钻探(WFSD)项目

摘　　要：汶川科学钻探项目是在龙门山北川—映秀断裂及龙门山前缘安县—灌县断裂附近实施4口科学群钻的基础上,开展地质构造、地震地质、岩石力学、化学物理、地震物理、流体作用和流变学等多学科研究。对汶川科钻2号井岩心资料和测井资料进行分析,得到汶川地震断裂带深部物质的组成,为判断活动断裂的位置、结构、产状、各种构造要素以及断裂破坏带的宽度和破坏强度并划分出断层岩的类型等提供了依据。传统交会图法划分岩性虽然在一定程度上可以区分部分岩性,但是在边界上岩性很难区分。采用地层组分分析原理,通过最优化方法计算其岩性成分,为这一地区的复杂岩性识别提供参考。The project of Wenchuan scientific drilling is multidisciplinary research based on four scientific drilling boreholes about geological structure,seismic geology,rock mechanics,chemical physics,fluid action and rheology are carried in the Beichuan-Yingxiu fracture in Longmen mountain and Anxian-Guanxian fracture in Longmen mountain front.According to analysis on the core data and log data of the borehole No.2of Wenchuan scientific drilling,the composition of deep material of Wenchuan earthquake fault zone is gotten to provide the basis for determining the position,structure,occurrence,structural elements,width and destruction intensity of the active faults and identification of fault formation rock types.The traditional method of dividing lithology cross plot although,to some extent,part of lithologies can be distinguished,but it is difficult to distinguish lithological boundaries.In this paper,based on the stratigraphic component analysis theory,the optimizing method is used to calculate its lithological composition of the above region for the reference of complex lithology identification.

关 键 词：测井资料 岩性识别 汶川科学钻探 交会图 地层组分 

分 类 号：P631.82[天文地球—地质矿产勘探]