Methods and apparatus for measuring streaming potentials and...

G - Physics – 01 – V

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G01V 3/26 (2006.01)

Patent

CA 2570049

Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about a completed wellbore. The measured streaming potentials are generated by drilling with an overbearing pressure, slitting the mudcake in a borehole, acid injection, or any of various other manners which causes fluid movement. The data obtained is interpreted to locate fractures, measure formation permeability, estimate formation pressure, monitor drilling fluid loss, detect abnormal pressure, etc. Particularly, a streaming potential voltage transient having a double peak profile signifies the presence of a formation fracture.

Selon cette invention, il est possible de caractériser des formations terrestres en utilisant un réseau d'électrodes qui peuvent mesurer les potentiels d'électrofiltration de la formation et interpréter les données fournies par les électrodes. Les électrodes sont placées sur un outil du câble, un outil de diagraphie utilisé pendant le forage ou d'une manière fixe autour d'un puits de forage complété. Les potentiels d'électrofiltration mesurés sont générés par forage à une pression exagérée, fendant le gâteau de filtration d'un puits, par injection d'acide ou de toute autre manière entraînant le déplacement du fluide. Les données obtenues sont interprétées afin de localiser des fractures, mesurer la perméabilité de la formation, estimer la pression de la formation, surveiller la perte de fluide de forage, détecter une pression anormale, etc. En particulier, une tension de potentiel d'électrofiltration transitoire ayant un profil à double crête signifie la présence d'une fracture dans la formation.

LandOfFree

Say what you really think

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

Rating

Methods and apparatus for measuring streaming potentials and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatus for measuring streaming potentials and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for measuring streaming potentials and... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1800537

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