Development Of Electromagnetic Field Data Preprocessing Software For Marine Controllable Source

The Marine controlled source electromagnetic method is a resource exploration method to determine the location of seabed oil and gas resources and estimate the value of reservoir by the principle that the resistivity of oil and gas resources is different from that of surrounding sediments.At home and abroad,the Marine controlled source electromagnetic method has made great progress.In theory,the Marine controllable source electromagnetic method has been gradually mature.In terms of instruments,the research and development of a series of large-scale Marine controllable source electromagnetic exploration instruments indicates that the Marine controllable source electromagnetic system is moving from theory to practice.In the aspect of data processing,there are many perfect and reliable data processing methods.However,in the process of processing a large number of Marine controllable source electromagnetic data,in addition to the theoretical method support,but also need to rely on convenient and efficient data processing software.At present,there are still some problems such as low processing efficiency and missing visual interface in the electromagnetic data processing software of Marine controllable source in China.Most of the electromagnetic data processing software of ocean controllable source is developed based on MATLAB,JAVE and FORTRAN,and there is no relatively simple and efficient field data processing software of ocean controllable source.Existing software mainly relies on scattered programs for data processing,so there are problems such as complicated operation,high error rate and low efficiency.The process of ocean controllable source data processing includes data preprocessing and data inversion.Data preprocessing software is an important part of ocean controllable source data processing,and it is urgent to develop efficient ocean controllable source electromagnetic field data preprocessing software.In this paper,based on the existing Marine controllable source electromagnetic method basic principles,through the Marine controllable source electromagnetic data processing method of learning,using VC++6.0 MFC framework prepared for the Marine controllable source electromagnetic field data preprocessing software.By combining software engineering with data processing,the development of efficient data preprocessing software enables the Marine controllable source electromagnetic data preprocessing software to perform data preview,status query,function calculation and other operations on the original data.The collected data are preliminarily determined by data preview,and the energy spectral density,coherence coefficient,power spectral density and other information are obtained.The calculated results are plotted and saved,and the field data are quickly evaluated to improve the efficiency of offshore field construction.In 2018,the project team carried out offshore controllable source electromagnetic exploration in the target sea area of natural gas hydrate,and preprocessed the collected data on the spot with the offshore controllable source electromagnetic field data preprocessing software,proving the reliability and high efficiency of the software.The results show that the software is interactive,easy to operate and reliable.