罗家地区井间地震方法与效果  

Cross-hole seismic method and effect in Luojia area.

作　　者：周建宇[1] 何惺华[2] 李安夏[2] 梁周军[3] 

机构地区：[1]中国科学院兰州地质所 [2]胜利油田有限公司物探研究院 [3]泰探公司

出　　处：《石油地球物理勘探》2001年第6期745-753,共9页Oil Geophysical Prospecting

摘　　要：周建宇 ,何惺华 ,李安夏 ,梁周军 .罗家地区井间地震方法与效果 .石油地球物理勘探 ,2 0 0 1,36 (6 ) :74 5～ 75 3　　井间地震是将震源与检波器都置入井中进行地震波观测的一种物探新方法。胜利油田与 To-moseis公司合作 ,在罗家地区进行了成功的井间地震试验。在取得高质量原始资料的基础上 ,进行了直达波旅行时反演处理与反射波成像处理 ,最终获得较高分辨率的井间速度层析剖面与反射波成像剖面。最高视频率达 5 0 0 Hz,可分辨的最小地层厚度为 3～ 5 m。成果剖面经综合解释 ,对井间储集层的横向分布与连通性、火成岩蚀变带、小断层、砂泥岩薄互层等复杂的地质现象有了清晰明确的认识。井间地震资料不仅可直接服务于油气田的开发 ,而且也可以标定三维地震资料。Cross-hole seismology is a new geophysical prospecting method that the source and geophone are put into down-hole to observe seismic wave.Shengli oilfield and Tomoseis company work together and conduct cross-hole seismic test successfully in Luojia area.Having original data in high quality,processing on travel-time inversion for first arrival and on reflection imaging has been done.The final achievements are tomographic profile of cross-hole velocity and reflection imaging profile with higher resolution.The highest apparent frequency can be 500 Hz and resolvable minimum thickness of layer is 3~5 m. Through integrative interpretation of resulted profile,we can clearly realize complex and subtle geologic phenomena such as lateral distribution and continuity of reservoir,zone of igneous alteration,small fault,thin and interbedded sand-shale.Efficiency of cross-hole seismic data is not only serving for development of field directly but also calibrating 3-D seismic data in exploration area.

关 键 词：井间地震方法 分辨率 旅行时层析反演 VSP-CDP成像 罗家地区 地震勘探 

分 类 号：P631.429[天文地球—地质矿产勘探]