button resistivity — Oil & Gas Glossary

The resistivity measured by the buttons of a measurements-while-drilling (MWD) toroid device. Typically three buttons, each with a different depth of investigation, are mounted on a sleeve attached to the drillstring, and by their nature are azimuthally focused. The measurement is similar to a wirelinemicroresistivity log, except that toroids are used instead of electrodes for transmitting and monitoring. The button