PROCESS OF ELECTROMAGNETIC, ELECTRIC, AND SEISMIC MICRO TIME-LAPSE FOR THE DIRECT DETECTION OF HYDROCARBONS, SALINE INTRUSIONS AND ABNORMALITIES IN LIVE TISSUES.

摘要

Process of electromagnetic, electric and seismic micro time-lapse consisting in the detection, mapping and quantification of the dissipative linear behaviour in materials, which results from the presence of one or several attenuation mechanisms related to the presence of porosity, permeability, hydrocarbons (oil and gas), saline intrusions and abnormalities in live tissues. The present process is applied to different science fields, including the exploration, development and production of oil wells, the non-destructive evaluation of materials in laboratory or in-situ, as well as the geotecnics and detection of abnormalities in tissues by means of medical imaging processes. The inventive process is characterised in that it uses a dual offset wavefield diffused by the material as a single wavetrain and which phase is in compliance with the creep time of the medium. The process is based on the linear dissipative behaviour of materials. Mechanical waves are known as Pilot and Tracer which have their electromagnetic equivalent. The mechanical or electromagnetic waves may be generated by one or several sources in a synchronous but offset manner. The purpose of the pilot wave is to measure the transitory fluctuation of the physical properties of the material resulting from the tracer wave stimulation. The process may further use a single wavetrain which phase is modified to simulate a dual wavefield.