CAJ | 학술논문

采用高阶差分法求解任意广角声波方程，推导了各向同性介质中任意广角声波方程叠前逆时深度偏移的差分算子，给出了适用于任意广角声波方程逆时延拓的吸收边界条件和其计算方法，在此基础上实现了任意广角声波方程的高精度逆时延拓。分析了不同模型条件下任意广角声波方程叠前逆时深度偏移的脉冲响应，分析结果表明，任意广角方程逆时偏移算子可压制层间反射波，减少偏移噪声，理论模型的成像结果表明该方法能够对复杂构造模型精确成像。
채용고계차분법구해임의엄각성파방정，추도료각향동성개질중임의엄각성파방정첩전역시심도편이적차분산자，급출료괄용우임의엄각성파방정역시연탁적흡수변계조건화기계산방법，재차기출상실현료임의엄각성파방정적고정도역시연탁。분석료불동모형조건하임의엄각성파방정첩전역시심도편이적맥충향응，분석결과표명，임의엄각방정역시편이산자가압제층간반사파，감소편이조성，이론모형적성상결과표명해방법능구대복잡구조모형정학성상。
Using high order difference method to solve arbitrary wide-angle acoustic wave equations (AWWE), deduced difference oper-ators of AWWE prestack reverse-time depth migration in isotropic medium, has derived absorbing boundary conditions adequate for AWWE reverse-time continuation and computation method, and realized high accuracy reverse-time continuation. Analyzed prestack reverse-time depth migration impulse response under different model conditions, the result has shown that the AWWE reverse-time migration operators can suppress the interlayer reflection waves, reduce migration noises, the theoretical model imaging result has shown that the method can precisely imaging the complex structural models.