Research on the High-Speed Storage System of Oil-Based Mud Micro Scanning Instrument Underground

Oil-based electrical imaging instruments generate massive amounts of data due to their multi-frequency sweeping operation, making real-time transmission of downhole data to the surface via cables extremely challenging. Therefore, this paper designs a high-capacity and high-speed storage system suitable for oil-based micro-scanning imaging instruments to store downhole data. The system consists of two parts: a data control module and a storage board. The data control module, with DSP as its control core, realizes the reception, processing, and transmission of downhole data. The storage board employs the high-capacity storage chip K9MDG08U5D working in conjunction with FPGA to achieve data storage and reading functions. Tests show that the system can accurately realize data storage and reading functions within the transmission rate range of 1Mbps to 10Mbps. In addition, the system can continue storage after a power failure and restart, possessing the capability to handle unexpected situations. The downhole high-speed storage system has successfully achieved storage functions under both normal and emergency conditions, which holds significant practical value for the research and development of oil-based electrical imaging and promotes the independent research and development of oil-based electrical imaging instruments in China.