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The Coso EGS Project—Recent Developments

机译：COSO EGS项目最近的发展

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摘要

A preliminary fracture/stress analysis was conducted for the recently drilled well 38C-9 as part of a continuing effort to characterize the stress state within the east flank of the Coso geothermal field. Electric Micro Imager (EMI) data were analyzed over the logged interval of 5,881-9,408 ft. Naturally occurring fractures were analyzed in order to determine both fracture dip and azimuth. Most of the fractures dip steeply with dip azimuths approximately to the east, with a subset dipping steeply in a westerly direction. Drilling induced tensile fractures were used to determine that the orientation of the maximum horizontal stress is 14°+/-16°, although this is approximate as the data have to be corrected for wellbore deviation. Petrologic analyses of cuttings from several wells were used to construct a vein-mineral paragenesis of the Coso east flank. Fluid inclusion analyses of cuttings from well 83-16 were used to determine the temperatures of vein mineralization.
机译：对于最近钻井38C-9进行了初步裂缝/应力分析，作为表征COSO地热场的东侧侧面内的应力状态的持续努力的一部分。通过测量的间隔分析电动微图像仪（EMI）数据，为5,881-9,408英尺的记录间隔。分析天然存在的裂缝以确定骨折浸渍和方位角。大多数骨折陡峭地倾斜，大约大约向东倾斜，具有陡峭的方向陡峭地倾斜。钻孔诱导的拉伸裂缝用于确定最大水平应力的取向为14°+/- 16°，但是随着该数据必须校正井眼偏差，这是近似。来自几个孔的疾病分析用于构建COSO东侧的静脉矿物疫苗。利用83-16井的切屑的流体包涵体分析来确定静脉矿化的温度。

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