永定河流域新生代地层岩相地震识别  

Seismic identification of lithofacies of Cenozoic stratigraphic in the Yongding River Basin

作　　者：王小江[1,2] 李培 张凯[1,2] 荣立新 姜春香[1,2] 李金丽 WANG Xiaojiang;LI Pei;ZHANG Kai;RONG Lixin;JIANG Chunxiang;LI Jinli(Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,Hebei,China;The National Center for Geological Exploration Technology,Langfang 065000,Hebei,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]国家现代地质勘查工程技术研究中心,河北廊坊065000

出　　处：《地质通报》2023年第2期332-342,共11页Geological Bulletin of China

基　　金：国家重点研发计划《高精度光纤深地地质结构成像探测仪示范应用》(编号:2018YFF01013504);中国地质调查局项目《永定河冲积平原区域地质调查》(编号:DD20160046);国家自然科学基金项目《提高面波干涉法横向分辨率的关键技术研究》(批准号:41704044);地科院基金项目《主动源和被动源面波联合勘探方法技术研究》(编号:YYWF201634)。

摘　　要：为支撑永定河流域重要经济区新时期多要素基础地质调查工作,开展了高分辨率地震探测试验。在地震地层学和地震沉积学原理指导下,运用井震标定、波阻抗反演和90°相位法等关键技术,进行岩心、测井和地震特征对比,对测区的新生界进行了精细地质构造、地层、岩相等识别分析。研究表明,波阻抗反演和90°相位转换具有良好的测井、岩性标定效果,不同相带内沉积物在波阻抗剖面上具有明显的特征,波阻抗值的高低和岩性的粗细具有较好的对应关系,对河道、积水洼地、三角洲等的叠置、组合关系刻画精细,而90°相位剖面波峰和中高波阻抗一致,能够简单快速地识别河道砂体展布。In order to support the multi-factors basic geological survey in the important economic zone of the Yongding River Basin in the new period,we developed high-resolution seismic detection test.Under the guidance of seismic stratigraphy and seismic sedimentology,we used some key techniques such as well-seismic calibrat,wave impedance inversion and 90°phase method to compare the characteristics of core,well logging and seismic wave field.The Cenozoic in the survey area has been identified and analyzed in terms of fine geological structure,stratum and lithofacies.The research results show that the wave impedance inversion and 90°phase transformation have good effect on logging and lithology calibration,the sediments in different facies zones have obvious characteristics on the wave impedance section,and the wave impedance value has a good relationship with the lithology grain size,the superimposition and combination of river course,water-logged depression and delta are described in detail.The wave crest of 90°phase section is consistent with the mid-high impedance,it can identify the distribution of channel sand body simply and quickly.

关 键 词：永定河 新生代 岩相 地震探测 波阻抗反演 90°相位法 

分 类 号：P534.6[天文地球—古生物学与地层学] P586[天文地球—地质学]