4D observation of the formation of rock fractures during rotary shear

نویسندگان

  • Qi Zhao
  • Nicola Tisato
  • Giovanni Grasselli
چکیده

Understanding how grain and powder lubrication affect rock friction and fracture dilation, and how microscopic fractures develop according to fault activation may directly improve our capabilities in exploration and stimulation of oil and gas reservoirs. Using a novel rotary shear testing apparatus specifically designed and assembled to conduct experiments inside an X-ray micro computed tomography machine (μCT) we are able to “see” how rock friction and fracturing process develop during the shearing process, without perturbing the system. Shearing the sample at incremental small steps and recording the variation of normal force and friction during those steps, we are able to shed light on the fracturing and frictional sliding processes.

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تاریخ انتشار 2015