南方山地地震勘探中坡积带调查与识别方法  

An Investigation and Identification Method for Slope Accumulation Belts in Seismic Exploration in Southern Mountainous Areas

作　　者：杨波[1] YANG Bo(Research Institute of Exploration&Production,Sinopec Jianghan Oilfield Company,Wuhan,Hubei 460223,China)

机构地区：[1]中国石化江汉油田分公司勘探开发研究院,湖北武汉460223

出　　处：《江汉石油职工大学学报》2024年第3期4-6,23,共4页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：地表复杂是南方山地地震勘探面临最严重的问题之一,除典型的地表起伏剧烈、岩性复杂、表层速度横向变化大,引起能量不一致及静校正问题以外,不同的激发条件也会造成单炮品质的差异。地震勘探中激发岩性的选择是决定资料品质的关键因素之一,分析以往山地资料,得出坡积带的存在是导致地表速度剧烈变化的主要原因之一,也是影响单炮资料品质主要因素之一。在地震采集过程中,通过开展对南方山地坡积带成因研究,形成坡积带的调查与识别方法,提前对坡积带范围进行圈定,有利于指导后期激发点优化设计,优选激发岩性,进一步提高资料品质。Complex surface conditions are one of the most serious challenges faced by seismic exploration in southern mountainous areas.In addition to typical challenges such as significant surface undulations,complex lithology,large lateral changes in surface velocity,resulting in inconsistent energy and static correction issues,different excitation conditions can also cause differences in single-shot quality.In seismic exploration,the selection of methods to excite lithology is one of the key factors determining the quality of data.Through the analysis of previous mountainous data,it is found that the existence of slope accumulation belts is one of the main reasons for the significant changes in surface velocity and one of the main factors affecting the data quality of single shots.During seismic acquisition,by conducting research on the causes of slope accumulation belts in southern mountainous areas,an investigation and identification method for slope accumulation belts is formed,which is conducive to delineating the scope of slope accumulation belts in advance,guiding the optimization design of later excitation points,and selecting excitated lithology,thereby further improving data quality.

关 键 词：南方山地 坡积带 地震勘探 地震资料品质 

分 类 号：P631.4[天文地球—地质矿产勘探]