����ɿ�Դ��� (MCSEM) ������һ�ֵ�Ƶ��Ų����׿�̽���������������Ĵ��������� MCSEM �������ݽ�����ɱȽ����ص�Ӱ�졣���Ķ� MCSEM �����ص�ʹ�ͳ˫���˲����������ܽ�عˣ��ڴ�ͳ˫���˲����������ϸ��� MCSEM �����ص����ʱ��˫���˲�������Ӧ�õ� MCSEM ���ݴ����С�ͨ����ģ�����ݺ�ʵ�����ݵĴ����������: ʱ��˫���˲��ķ����ܹ��Ϻõ�ѹ�� MC- SEM �������������С�Զ�շ���������������ţ���������ں�������� MCSEM ����������

The marine controlled- source electromagnetic (MCSEM) method is a low frequency electromagnet- ic subsurface surveying technique�� The existence of the seafloor noise often seriously influenced the MCSEM follow- up inversion and interpretation�� In this paper�� we reviewed the MCSEM noise characteristics and traditional Bilater- al Filtering method��and proposed time- varying Bilateral Filtering method on the basis of the traditional Bilateral Filtering method and MCSEM noise features��and applied this method into MCSEM data processing�� Through the processing of synthetic model and field data��the result shows that the MCSEM noise can be well suppressed by the time- varying Bilateral Filtering method��especially for the middle- long and long offset area noise��which improved the MCSEM data quality for follow- up processing��