Fracture characterization was attempted using the pennyshaped fluid-filled crack model in the Australian Hot Dry Rock field. For the characterization, a seismic event observed during drilling was used. This event was a weak attenuation event and continued over 100 seconds. The characterization method, which is based on the dynamics of a penny shaped crack filled with fluid, allows the estimation of crack aperture, radius and interfacial stiffness due to partial contact between upper and lower crack surfaces. A comparison of peak frequencies detected from field data with eigen frequencies suggested by the crack modelindicates that crack radius and aperture are about 160m and 17mm. The latter result needs additional consideration since the intensity of attenuation predicted by the computed model parameters is greater than that observed in the field data.
|ジャーナル||Transactions - Geothermal Resources Council|
|出版ステータス||Published - 2004 12 1|
|イベント||Geothermal Energy: The Reliable Renewable - Geothermal Resources Council 2004 Annual Meeting, GRC - Indian Wells, CA, United States|
継続期間: 2004 8 29 → 2004 9 1
ASJC Scopus subject areas