FREMGANGSMAATE FOR DETEKTERING OG MAALING IN SITU AV ELASTISK ANISOTROPI I UNDERJORDISKE FORMASJONER

摘要

Elastic anisotropy is detected and measured in-situ in a subterranean rock formation penetrated by a well bore by exerting pressure on the formation by way of the well bore, and measuring the incremental diametral displacements of the well bore at a location therein adjacent the formation as the pressure on the formation is increased. The magnitudes of the diametral displacements are compared to detect and measure elastic anisotropy in the formation.