The wireline log is used to determine the physical/chemical characteristics of the geological formations crossed by a borehole or a well and the fluids present inside it. The physical/chemical characteristics are deduced directly or indirectly from a wide range of measurable data. The wireline log service is performed with specific probes connected to the surface by signal cables. The measured data are then combinated each other to determine individual properties of interest.
Main application fields for the wireline log:
♦ hydrogeology and geothermal research;
♦ mining exploitation;
♦ environmental research.
Main advantages for the wireline log are:
♦ the continuous recording of the borehole parameters provides an amount and quality (repeatability or reproducibility) of data not comparable to the traditional geognostic techniques;
♦ it allows to obtain data even in drilling intervals with difficult recovery;
♦ it allows to reduce the coring operations to uncored boreholes economizing the cost and execution time;
♦ it represents a powerful tool to use during the design phase.