摘要
地震勘探技术是地球物理勘探技术中的重要方法之一。地震勘探技术的迅猛发展,使该方法技术的种类日趋完善。不同的地震勘探方法有不同的应用条件,可以解决不同的地质问题。针对不同查区不同的探测目的,采用折射波法对湖南某查区第四系地层分布和破碎带调查、人工源面波勘探对南京句容岩溶分布位置及分布范围调查、采用横波反射法勘探对扬州查区第四系分层以及采用纵波反射法对云南查区基岩构造调查,调查结果发现:(1)在湖南查区自上而下有三个速度层分别为325~1020 m/s,1980~2640 m/s,3800~4120 m/s,且在测线603~612 m处出现宽4~9 m局部低速带;(2)南京句容岩溶探测发现4个异常区,其中,DS3为已知岩溶异常,DS4异常推测为砂岩不密实所致,DS1异常、DS2异常后期钻孔验证为岩溶所致;(3)很好地对扬州第四系浅地层进行了分层;(4)查明了云南查区基岩埋深及地质构造。结果可以为解决不同的地质问题提供可靠的地震勘探方法技术参考。
Seismic exploration technology is one of the important methods in geophysical exploration technology.The rapid development of seismic exploration technology has made the type of method technology more and more perfect.Different seismic exploration methods have different application conditions and can solve various geological problems.According to the different exploration purposes in different areas,the refraction wave method was used to investigate the quaternary strata distribution and fracture zone in a certain area in Hunan,the artificial surface wave method was used to investigate the location and distribution range of karst in Jurong,Nanjing,the shear wave reflection method was used to investigate the quaternary stratification in Yangzhou,and the longitudinal wave reflection method was used to investigate the bedrock structure in Yunnan.The survey showed that:①There are three velocity layers from top to bottom in the Hunan investigation area,the velocity is 325~1020 m/s,1980~2640 m/s and 3800~4120 m/s,and there is 4~9 m wide local low speed belt in the measurement line of 603~612 m;②Four abnormal areas were found in Jurong karst exploration in Nanjing,among which DS3 was known karst anomaly,DS4 anomaly was presumed to be caused by sandstone incompaction,and DS1 anomaly and DS2 anomaly were verified to be caused by karst by late drilling;③The shallow strata of the quaternary system in Yangzhou have been stratified well;④The depth of bedrock burial and geological structure in Yunnan investigated area were ascertained.These results can provide reliable references for solving different geological problems.
作者
李家棒
黄仕茂
袁星虎
崔乐宁
LI Jiabang;HUANG Shimao;YUAN Xinghu;CUI Lening(Geological Exploration Technology Institute of Jiangsu Province,Nanjing 210049,China;Jiangsu Aviation Ground Detection and Intelligent Sensing Engineering Research Center,Nanjing 210049,China)
出处
《石油物探》
CSCD
北大核心
2023年第S01期179-184,共6页
Geophysical Prospecting For Petroleum
基金
地震行业科研专项“中国地震科学台阵探测-南北地震带南段”和中央级公益性科研院所基本业务专项(DQJB11C13)共同资助
关键词
折射勘探
面波勘探
反射波法勘探
第四系分层
基岩构造调查
refraction exploration
surface wave exploration
reflection wave exploration
quaternary stratification
bedrock structure survey
