High Resolution Seismic Data Acquisition And Transmission System Design

In the present in the process of oil exploration,seismic exploration technology as the main body of the geophysical prospecting method has become the main driver of oil and gas exploration and development industry.Can be based on the seismic data processing,analysis and interpretation,based on the characteristics of the seismic data and seismic wave propagation law such as the nature of the information to analyze the different depth of underground strata,structure,form,thus analysis predict whether the formation of exploration by the storage of oil or natural gas and other mineral resources,finally,provide the basis for the actual drilling work.Oil and gas exploration of the current our country gradually into the oil and gas basin,increase exploration depth and geological structure is more complex,oil and gas exploration and development technical difficulty gradually increase.It puts forward new requirements for the current geological exploration instrument and challenges.Hardware digital filter has been widely used in the digital seismic exploration instruments,its performance directly affects the signal-to-noise ratio of the seismic signals were collected and harmonic distortion,etc.For seismic data acquisition equipment and high precision,high resolution,high signal-to-noise ratio,this paper uses the currently widely used in seismic data acquisition system of multistage sampling filter technology,we design a digital filter is suitable for seismic exploration instrument hardware.The digital filter of a series of Altera FPGA as a platform,CIC filter,for the front,half band filter and FIR filter as the back-end,form a cascade structure,seismic data extraction filter processing.Required for seismic data storage and transmission,the design based on architecture(Cortex-M4 kernel STM32F4 series microcontroller as the core,the integrated IS62WV102416 chip with high capacity SD card seismic data storage,the Ethernet driver chip DP83848 and RS485 interface transceiver chip MAX1348 constitute a communication network.The experimental results show that the digital filter based on FPGA hardware meet the design requirements,the controller is stable and reliable data transmission.