Abstract
Abstract An experimental research program has been initiated to investigate the electrical properties of swelling shales across a wide frequency range, 10 Hz to 1.3 GHz. This range spans the spectrum of the commonly used downhole logging measurements, from the deep laterologs to the microwave dielectric tools. Three distinct measurement techniques have been utilized to span the range: multiple electrodes at low frequencies, two-electrode with balanced bridge for the middle frequencies, and open-ended coaxial probe with network analyzer at the high end. The probe technique is simple to use, potentially enabling field measurements of complex permittivity to be taken, although some accuracy is sacrificed. The effects of swelling are most pronounced at the lowest frequencies. The weight of a shale which has been exposed to a change in relative humidity reaches equilibrium long before the electrical properties do.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
