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新疆哈密地区砂岩地震波速的实验研究及其对特殊地质填图物性工作的启示
投稿时间:2016-10-15    点此下载全文
引用本文:王怀民,王红才,殷昌吉,李阿伟,赵卫华,杜威.新疆哈密地区砂岩地震波速的实验研究及其对特殊地质填图物性工作的启示[J].地质力学学报,2017,23(2):224-231
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作者单位E-mail
王怀民 中国地质科学院地质力学研究所, 北京 100081;中国石油大学(北京) 地球科学学院, 北京 102249  
王红才 中国地质科学院地质力学研究所, 北京 100081 13911082285@139.com 
殷昌吉 中石化新星湖北新能源开发有限公司, 湖北 武汉 430000  
李阿伟 中国地质科学院地质力学研究所, 北京 100081  
赵卫华 中国地质科学院地质力学研究所, 北京 100081  
杜威 中国地质科学院地质力学研究所, 北京 100081;中国石油大学(北京) 地球科学学院, 北京 102249  
基金项目:中国地质调查局项目"特殊地质地貌区填图试点"(DD20160060)
中文摘要:本文在特殊地质填图的过程中研究了哈密地区砂岩的地震波速,利用ZBL-U520非金属超声检测仪和Autolab2000多功能岩石物性设备,在0~200 MPa(约0~7000 m地下深度)下研究了密度、孔隙度和压力三个因素对砂岩地震波速的影响。研究发现:砂岩的波速与密度呈正相关关系,但与孔隙度呈负相关关系;纵波与密度和孔隙度的线性关系好于横波;波速与压力呈对数关系。此外,本文还分析了ZBL-U520与Autolab2000两种仪器测试方法的适用性。最后针对地质填图的特点给出建议:在特殊地质填图中,不仅要按照规范采集标本,测试其在常温常压下的岩石波速,还应该适当考察不同地层压力状态下的速度特征,才能更全面地认识填图区地震波的性质。
中文关键词:特殊地质填图  哈密地区砂岩地震波速  围压  孔隙度  密度
 
THE EXPERIMENTAL RESEARCH OF SEISMIC WAVE VELOCITY OF SANDSTONES IN HAMI, XINJIANG AND THE ENLIGHTMENT TO THE WORK OF PROPERTY ON SPECIAL GEOLOGICAL MAPPING
Abstract:The seismic wave velocity of sandstones in Hami in the process of special geological mapping isstudied in this article. The effects of density, porosity and pressure on seismic wave velocity under different pressure(0~200 MPa)are analyzed by applying ZBL-U520 nonmetal ultrasonic detector and AutoLab 2000 computer-controlled servo hydraulic triaxial test system. The results show that wave velocity and density are positively correlated, but there is a negative correlation between wave velocity and porosity. The degree of linear relationship between density or porosity and P-wave is higher than that of S-wave. Both P-and S-wave velocities of sandstones in Hami area increase notably with the increasing pressure which denotes a strong logarithmic relationship.Besides,the adaptability of test methods of ZBL-U520 nonmetal ultrasonic detector and AutoLab 2000 computer-controlled servo hydraulic triaxial test system are analyzed.In conclusion, in respect of geological mapping it is suggested that not only should we collect samples to test the seismic wave velocity of rocks at normal temperatures and pressure, but also we should analyze the seismic wave characteristics under different formation pressure to comprehensively understand the seismic properties in special geological mapping.
keywords:special geological mapping  seismic wave velocity of sandstone in Hami area  confining pressure  porosity  density
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