Abstract

Some of the methods used at the present time for determining the angle and the azimuth of the dip in the formations traversed by a borehole are based on correlations between three curves recording certain electrical characteristics of the formations, such as SP or resistivity, along the wall of the borehole in three equally spaced azimuths. With the conventional equipment used for the application of these methods, the measurements are made over separate intervals of depth.In the present paper, a new improved instrument called the MicroLog Continuous Dipmeter is described, wherein the three curves used for the determination of the dip are obtained with three MicroLog devices and wherein these three curves--as well as the orientation of the instrument and the inclination of the borehole--are simultaneously and continuously recorded.It is shown that with the help of this instrument more numerous dip determinations can be made in a given well with a higher accuracy and a greater recording speed.The paper is illustrated with field examples.

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