| A main research in technology of ultrasonic oil's exploitation is the influencefor porous media of oil deposited. Improving the permeability of porous media is thekey to Technology for Sonication Oil Well Stimulation . Therefore, It makes sense toOil Well Stimulation in this paper, which studies the influence mechanism of theporous media in permeability .Based on experiment research and in light of the theory of the fracturemechanics, the typical brittle porous media rocks that suffer from the join forces ofhigh temperature, high pressure and ultrasonic has been analy z e d and researched bythe means of finite element method and in terms of the change of energy and thedevelopment of crack.First of all, the typical brittle porous media rocks were obtained fromengineering site and they were prepared as standard specimens of 25mm in diameterand 80mm in length. Both conventional uniaxial compression tests and uniaxial pulltests are conducted on Instron5500r testing machine according to 50 C ?, 100 C ?,150 C ?. Besides, strength characteristic and mechanical parameters are analyzed indetail.Second, this paper research on the law of transmit and change between theenergy of Sonication and the strain energy of porous media rocks. We get theequations about energy of Sonication as a basic from the law and analyses theequations of energy.Once again, the simulations are conducted to analyze the status in the height ofthree thousand meter and five thousand meter separately by the famous FE softwareAnsys. Besides, the energy of Sonication that from the elastic area to plastic area wasinfe r ed.Finally, under ideal plastic material supposition, the expression of plasticvolume and theoretic strain on cycle loads are calculated. Plastic dissipated energyunder fatigue, consider from the energy of ultrasonic. This energy of ultrasonic plusthe frequency of ultrasonic is the strain energy in plastic crack area which changesfrom ultrasonic.
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