A New Method of Rock Stress Measurements on Stress Record Core Obtained by the Dual Bit Coring and Its Laboratory Verification

Kumazawa, Akinobu

A New Method of Rock Stress Measurements on Stress Record Core Obtained by the Dual Bit Coring and Its Laboratory Verification

Akinobu Kumazawa, Sendai, Miyagi, Japan, Takatoshi Ito, Tohoku University, Institute of Fluid Science, Sendai, Japan, Akio Funato, Fukada Geological Institute, Tokyo, Japan, Kazuhiko Tezuka, Japan Petroleum Exploration (JAPEX), Chiba, Japan and Tatsuya Yokoyama, OYO Corporation, Tokyo, Japan