Method and apparatus for the determination of the azimuthal angle and speed of a in the horizontal direction on a drill hole vorbeistroemenden the form of seeds as a function of the flue sig

摘要

METHOD AND APPARATUS FOR MEASURING AZIMUTH AND SPEED OF HORIZONTAL FLUID FLOW BY A BOREHOLE (D #74,948-F) Formation fluid is activated by a neutron source. A cluster of three gamma ray detectors provides count rate data with the count values varying among the three detectors as dictated by the geometry of the cluster and the angle of displacement of the activated fluid between the time of neutron bombardment and that of gamma ray detection. Measurements at different time intervals following the activation of the fluid may also be interpreted in terms of the speed of horizontal fluid flow past the borehole.