Method, system and be used for borehole imaging logs

摘要

A borehole logging tool system includes a surface system, a logging array, and a logging cable providing power supply and data paths connecting the logging array to the surface system, wherein the logging array includes a series of discrete sondes connected together. The sondes in the logging array, for example a borehole seismic logging array, are connected to their neighbours by means of lengths of logging cable. Such cable can be the same as that connecting the logging array to the surface system. The logging array can also include a master controller module which communicates with the surface system and which includes a first controller module which connects to the surface system and a second controller which controls operation of the sondes in the logging array independently of any other borehole logging tools connected to the surface system. The master controller can include a data buffer for handling data from the array and a clock which can be synchronised with a clock at the surface and which can be used in the control of the sondes in the array. Adopting such an arrangement with a borehole seismic logging array allows the sondes to continue acquiring data continuously under control of the master controller module irrespective of the transmission of data to the surface by the telemetry system.