Research On Design Method Of Phase-controlled Combination Receiving Parameters

The design of the geophone array parameters in production refers to the design of the array geophone numbers and array form(plane coordinates),which often uses the energy pattern analysis or the box wave test.The former is based on the superposition analysis of simple harmonics,and the latter is completely experimental.There are problems in the existing methods:First,the existing method is an argumentative design,not a quantitative optimization calculation;Second,the factors that affects the array response are not only the array numbers and the array plane coordinates,but also the difference between elevation,receive time,the weighting coefficients of array,which are often not discussed in conventional array designs,because field array are not easy to implement.In recent years,with the large-scale acquisition of high-density data,indoor array technology has been widely applied.The array parameters should be flexibly designed into multiple styles with the post-data processing requirements.So it is important to establish a quantitative method for designing array parameters,which should be able to correlate quantitative requirements with quantitative parameters,and consider the various factors that influence on array to reduce the number of solvability.In order to establish such a quantitative calculation method of array receiving parameters,the following research contents are mainly completed on the basis of predecessors:1)Deriving the formula of the array response of multiple frequency,discussing the influence of array parameters on energy response,analyzing the frequency response of the array;2)Demonstrating that the maximum theoretical SNR is used as the objective function for the array receiving parameter design,which has good effects in suppressing noises and protecting reflected wave energy and frequency;3)Compensating the energy of records with arrayed,which reduce the damage of array to the effective wave.The application of theoretical data shows that the method of array parameter design proposed in this paper can effectively improve the SNR of seismic data.