项目名称: VTI型构造煤地震波各向异性响应特征研究及裂隙预测
项目编号: No.41304105
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 李勤
作者单位: 西安科技大学
项目金额: 25万元
中文摘要: 煤层中裂隙的类型有许多种,多年来,我国有许多知名学者对煤矿裂隙进行了研究,也取得了丰硕的成果,然而对于煤层裂隙地震各向异性勘探技术一直缺乏系统的研究,现有的方法都处于探索性阶段,至今还没有一种完善的,能全面解决裂隙探测的软件和方法,不能满足煤矿开采环境越来越复杂的实际需求。本课题以VTI型构造煤为研究对象,围绕VTI型构造煤中裂隙的特点,以各向异性响应分析技术为突破点,在陕西、山西等地的裂隙型煤矿试验场,研究VTI型构造煤中地震资料采集方法,实现获取煤层高分辨率、高信噪比的地震资料技术;研究适于煤层的各向异性响应分析公式,优化各向异性响应分析算法,实现VTI型构造煤中各向异性信息分析与识别技术;通过理论模型模拟验证和矿区野外试验相结合的方式,探讨各向异性响应与裂隙型煤层之间的关联技术。项目研究结果将进一步挖掘地震勘探技术在煤矿探测上的潜力;给煤矿裂隙探测提供新的定量化参数。
中文关键词: VTI;煤层;各向异性;;
英文摘要: There are many kinds of fractures in coal seams. Over the years, many researches have studied coal seam fractures and have achieved fruitful results.But there are not systemic studies in seismic anisotropy explorating in coal seam fractures yet. There are not an efficient,complete method and a set of software in seismic anisotropic detecting in coal seam fractures.Existing methods in anisotropy of coal seam fractions do not meet actural demands because coal is mined in more and more complicate geological conditions. This project mainly discusses techniques of analyzing anisotropic response characteristics of coal seam fractures in VTI tectonic coal. It simulates seismic records by selecting an effective modeling method according to the experiment areas in Shanxi and Shanxi provinces to develop a new seismic data acquisition method in complicated structral background and get seimic records with high resolution and high signal-noise ratio.It does an analyzing research on anisotropic response in VTI coal by comparing the precision among the existing analyzing methods and getting some revised equations in seismic anisotropic response including veloctiy anisotropy,AVO anisotropy and anisotropic parameters,and optimizing calculating method of anisotropic response characteristics,because coal seam's unique features-co
英文关键词: VTI;coal seam;anisotropy;;