Method and apparatus for electrically investigating a borehole

G - Physics – 01 – V

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

324/10

G01V 3/20 (2006.01)

Patent

CA 1183896

METHOD AND APPARATUS FOR ELECTRICALLY INVESTIGATING A BOREHOLE Abstract of the Disclosure Methods and apparatuses for electrically investigating a borehole are described. Tool mounted pads are provided, each with a plurality of small measure electrodes from which individually measurable survey currents are injected toward the wall of the borehole. The measure electrodes are arranged in an array in which the measure electrodes are so placed at intervals along at least a circumferential direction (about the borehole axis) as to inject survey currents into the borehole wall segments which overlap with each other to a predetermined extent as the tool is moved along the borehole. The measure electrodes are made small to enable a de- tailed electrical investigation over a circumferentially contiguous segment of the borehole so as to obtain indications of the strati- graphy of the formation near the borehole wall as well as fractures and their orientations. In one technique, a spatially closed loop array of measure electrodes is provided around a central electrode with the array used to detect the spatial pattern of electrical energy injected by the central electrode. In another embodiment, a linear array of measure electrodes is provided to inject a flow of current into the formation over a circumferentially effectively contiguous segment of the borehole. Discrete portions of the flow of current are separably measurable so as to obtain a plurality of survey signals representative of the current density from the array and from which a detailed electrical picture of a circumferentially continuous segment of the borehole wall can be derived as the tool is moved along the borehole. In another form of an array of meas- ure electrodes, they are arranged in a closed loop, such as a circle, to enable direct measurements of orientations of resistivity of anomalies.

408356

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for electrically investigating a borehole does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for electrically investigating a borehole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for electrically investigating a borehole will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1194132

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.