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1.发明申请Real-Time Fracture Detection And Fracture Orientation Estimation Using Tri-Axial Induction Measurements 有权使用三轴导向测量的实时断裂检测和断层取向估计公开(公告)号：US20120065889A1
公开(公告)日：2012-03-15
申请号：US13217983
申请日：2011-08-25
申请人： Peter T. Wu , Dong Weixin , Thomas D. Barber , Dean Homan
发明人： Peter T. Wu , Dong Weixin , Thomas D. Barber , Dean Homan
IPC分类号： G06F19/00
摘要： A method for determining existence of a fracture in a formation surrounding a wellbore drilled through subsurface rock formations includes calculating vertical resistivity, horizontal resistivity, apparent formation dip, apparent formation azimuth and axial resistivity for a plurality of longitudinal instrument spacings using measurements from a triaxial induction well logging instrument disposed in the formation. A spread in the axial resistivity values is determined and the axial resistivity spread threshold therefrom. Fracture indicator values and fracture orientation values are calculated from transverse components of the triaxial induction measurements. Presence of a fracture is indicated when at least one of the fracture indicator value exceeds a selected threshold, the axial resistivity spread exceeds the spread threshold and when the apparent formation dip exceeds a selected threshold.
摘要翻译： 用于确定在通过地下岩层钻探的井筒周围的地层中的裂缝的存在的方法包括使用来自三轴感应的测量来计算多个纵向仪器间距的垂直电阻率，水平电阻率，表观地层倾角，表观形成方位角和轴向电阻率 测井仪器配置在地层中。 确定轴向电阻率值的扩展，其轴向电阻率扩展阈值。 断裂指标值和断裂取向值由三轴感应测量的横向分量计算。 当断裂指标值中的至少一个超过所选择的阈值时，指示断裂的存在，轴向电阻率扩展超过扩展阈值，并且当表观地层倾角超过选定的阈值时。
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公开(公告)号：US09606257B2
公开(公告)日：2017-03-28
申请号：US13217983
申请日：2011-08-25
申请人： Peter T. Wu , Dong Weixin , Thomas D. Barber , Dean Homan
发明人： Peter T. Wu , Dong Weixin , Thomas D. Barber , Dean Homan
摘要： A method for determining existence of a fracture in a formation surrounding a wellbore drilled through subsurface rock formations includes calculating vertical resistivity, horizontal resistivity, apparent formation dip, apparent formation azimuth and axial resistivity for a plurality of longitudinal instrument spacings using measurements from a triaxial induction well logging instrument disposed in the formation. A spread in the axial resistivity values is determined and the axial resistivity spread threshold therefrom. Fracture indicator values and fracture orientation values are calculated from transverse components of the triaxial induction measurements. Presence of a fracture is indicated when at least one of the fracture indicator value exceeds a selected threshold, the axial resistivity spread exceeds the spread threshold and when the apparent formation dip exceeds a selected threshold.
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