重复压裂地应力场数值模拟计算

Because of the limit of fracturing technics and materials , the flow conductivity of the fracture will decline day by day after the stimulate of hydralic fracturing .For the sake of stable yileds and ecnomical explorition benefits,we must take to hadraulic refracturing. Crustal stress of The reservoir which had hydraulic fractured will change , as the artificial fracture and the long time oil production .The induced stess of the first time fracture, manufacture and flooding will be calculated with the establishing of mathmatics modle. Also ,the induced stress in the aspect of primary mini-horizon pracinpal stress is more bigger than in the aspect of primary major horizon pracinpal stress . The new fracture will be build up when refracture as the stress turn invert .