Yuan, Xiyong (School of Geosciences, China University of Petroleum-East China, Qingdao, China) | Deng, Shaogui (School of Geosciences, China University of Petroleum-East China, Qingdao, China) | Wang, Lei (School of Geosciences, China University of Petroleum-East China, Qingdao, China) | Zhang, Pan (School of Geosciences, China University of Petroleum-East China, Qingdao, China)
Identification and characterization of fractures are critical to the exploration and production of tight reservoirs. This paper introduces a novel multi-array azimuthal resistivity laterolog logging method which can determine fracture position, aperture as well as the dipping angle and strike direction at the borehole level. We studied the responses with different fracture parameters, and numerical results show that amplitude difference among the array resistivity curves is dominated by fracture dipping angle, whereas the azimuthal resistivity are also controlled by fracture dipping direction. The azimuthal resistivity in fracture strike direction is low and the azimuthal resistivity in fracture dipping direction is high. Inclined fractures take on a sine-wave trend in azimuthal resistivity images, which indicates the attitude visually. Furthermore, this method can recognize high-angle fractures around borehole in a considerable distance. A simplified scaled-down experimental instrument was also designed to verify the accuracy of the method. Experimental test shows good consistency with that from numerical results, further indicating the accuracy and feasibility of the proposed method.
Presentation Date: Tuesday, October 16, 2018
Start Time: 1:50:00 PM
Location: 212A (Anaheim Convention Center)
Presentation Type: Oral