摘要
本文概述了井孔与弹性波相互作用这一经典理论问题的求解方法以及近期的一些重要进展和应用.特别是,用球面波的柱面波展开式同时求解井孔的弹性波辐射和入射(及散射)问题,避免了后一问题常用的平面波入射假设,由此可正确描述远探测波场球面传播的物理实质.介绍了将远场渐近方法和互易性原理用于求解这一问题的快捷有效的分析方法.将这一方法用于井中的声波远探测技术,可以准确模拟和分析井中的声源辐射,波在地层中的反射,以及井对入射弹性波的散射和透射等复杂波动现象.对于指向性声源(如偶极声源),还可以模拟其接收声场的方位特征,进而通过四分量测量确定反射体的走向.分析结果不仅为远探测技术奠定了扎实的理论基础,而且在实际应用中取得了良好的效果.
This paper elaborates the theory and method for solving the classic problem of the elastic-wave interaction with a borehole,emphasizing the recent important developments and applications.The use of the cylindrical-wave expansion method to solve both the borehole wave radiation and reception(and scattering)problems avoids the plane-wave incidence approximation commonly used in the latter problem,allowing for correctly modeling the spherical-wave propagation characteristics of the wavefield.By employing the far field asymptotic solution and the reciprocity of borehole radiation and reception,a fast and effective analysis method is obtained.Applying the analysis method to single-well acoustic imaging,one can accurately model and analyze the complex wave phenomena in the borehole wave radiation,scattering/reflection,and reception process.This method can also be used to simulate the azimuthal characteristics of the wavefield from a directional acoustic source(such as borehole dipole source),enabling the determination of the reflector azimuth using the four-component measurement.The analysis results not only laid a solid theoretical foundation for the single-well imaging technology,but also achieved good results in practical applications.
作者
唐晓明
古希浩
李杨虎
苏远大
TANG XiaoMing;GU XiHao;LI YangHu;SU YuanDa(School of Geosciences,China University of Petroleum,Qingdao 266580,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China;Key Laboratory of Deep Oil and Gas,China University of Petroleum,Qingdao 266580,China)
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2021年第12期4227-4238,共12页
Chinese Journal of Geophysics
基金
国家自然科学基金(41821002、42074137)
中石油重大科技项目(ZD2019-183-004)
山东省自然科学基金(ZR201911120382)联合资助.
关键词
井孔辐射和接收
井孔散射
声波远探测
Borehole radiation and reception
Borehole scattering
Borehole acoustic reflection survey
