Study on 3D simulation of wave fields in acoustic reflection image logging

作     者：TAO Guo,HE FengJiang,WANG Bing,WANG Hua & CHEN Ping State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China 

作者机构：State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2008年第51卷第S2期

页      面：186-194页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0704[理学-天文学] 

基　　金：Supported by the National Natural Science Foundation of China (Grant No.50674098) the National Basic Research Program of China (973 Program) (Grant No.2007CB209601) 

主　　题：acoustic reflection imaging 3D wave field modeling non-uniform staggered grid PML absorb ring boundary parallel scheme 

摘      要：The borehole acoustic reflection imaging logging is a newly developed acoustic logging method that has attracted many interests. These converted and reflected waves for imaging are usually mixed up with borehole guided waves and therefore difficult to be clearly identified. To improve the downhole tool design and develop more sophisticate data processing and interpretation algorithms,studies on precisely numerical modeling of the wave fields in the acoustic reflection imaging logging are neces-sary and critical. This paper developed a parallelized scheme of 3D finite difference (3DFD) with non-uniform staggered grid and PML absorbing boundary to simulate the acoustic wave fields in isotropic and anisotropic formations. Applications of this scheme to the typical cases of isotropic and anisot-ropic formations and comparison with the results from published analytical solutions have demon-strated the validation and efficiency of the scheme. Higher accuracy and lower computation cost (3.5 times faster than the conventional schemes) have been achieved with this scheme for modeling such a complex wave fields of 60 dB dynamic range with higher frequency (10 kHz). This simulating program provides a quantitative analytical means for studying acoustic reflection imaging tool and development of the data processing and interpretation methods.