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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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海洋可控源电磁法三维数值模拟
Keywords: 海洋可控源电磁法,有限差分,异常体,电磁场特征,数值模拟
Abstract:
？本文利用美国sandia国家实验室weiss编写的3d有限差分程序,通过建立的正演模型,开展3d水平电偶源电磁场特征与异常体空间展布特征(几何特征、埋藏特征)关系的实例研究,并对模型进行了正演数值模拟,得到以下几点认识:①同-位置处接收到的电场强度随着异常体半径的增大而增大,高阻体的存在能够增大电场强度,且异常体越大,场强也越大;②归-化后的电场曲线特征表明,随着发射电流频率的降低,异常体引起的异常越来越小;随着异常体半径增大,引起的异常也逐渐增大;③当异常体半径不变而埋深改变时,随着埋深的增加电场强度逐渐减小,对异常体的分辨力越来越小。文中所得结果对mcsem电磁场基本传播特性的认识和mcsem观测资料的解释提供了依据。
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| [19] | yuanjandedwardsrn.theassessmentofmarinegashydratesthroughelectricalremotesounding;hy-dratewithoutabsr.geophysicalresearchletters，2000,2397-2400
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