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Method for estimating the characteristics of stress of training, equipment to estimate the characteristics of the stress of the formations, and method to estimate the stress tensor desviatu00f3rio to from the directions of anisotropy of shear strength of the shaft and directions of sonic logging And failure of the profiling by image
Method for estimating the characteristics of stress of training, equipment to estimate the characteristics of the stress of the formations, and method to estimate the stress tensor desviatu00f3rio to from the directions of anisotropy of shear strength of the shaft and directions of sonic logging And failure of the profiling by image
Methods and apparatus for estimating stress characteristics of formations. The method comprises: (a) acquiring sonic anisotropy data, image data or both associated with at least one borehole (b) employing sonic anisotropy data to estimate fast shear direction (FSA) to extract FSA observed data; (c) computing FSA from forward modeling, forward modeling utilizes a first deviatoric stress tensor to extract FSA predicted data; (d) computing FSA misfit from difference between FSA observed data and FSA predicted data to obtain computed FSA misfit relating to first deviatoric stress tensor; (e) if computed FSA misfit is equal to or less than a defined value, then store computed FSA misfit, otherwise repeat steps (d)-(h) using another deviatoric stress tensor so a different deviatoric stress tensor is used for each repeat; (f) selecting smallest stored computed misfit from group consisting of stored computed FSA misfit, at least one other stored computed misfit or combination thereof.
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