| 摘要 |
PCT No. PCT/FR94/00083 Sec. 371 Date Jul. 26, 1995 Sec. 102(e) Date Jul. 26, 1995 PCT Filed Jan. 24, 1994 PCT Pub. No. WO94/17281 PCT Pub. Date Aug. 4, 1994Method of determining variations in the morphology of a borehole. It consists in measuring, as a function of the depth of the borehole, the dip and the azimuth (a1) of the borehole, the inside diameters of the borehole in two perpendicular directions, and the azimuth (a2) of a reference caliper and it is characterized in that consists in determining the eccentricity (em), together with an eccentricity error ( DELTA em), the azimuth (a3) of the second caliper from the azimuth (a2), and the rotation speed (VR) of the reference caliper, and then comparing ( DELTA em) to a threshold value ( DELTA es) and (VR) to a threshold value (VS ) to determine the type of ovalization of the borehole. |
