| At present, crude oil is the major and the most widely used energy in the world,it’s one of the strategic resources. With the constantly consumption of conventional oil and gas resources and the increasing demand for energy in world. To take effective measures to ensure the supply of the oil and gas resources which the national economic and social development needed will still be the primary problem most countries in the world are facing for a long period of time.Under the pressure of to expand oil and gas production and to increase the supply. It has become the primary task of the global oil exploration and efficiency development that rely on scientific and technological progress, strengthen the exploration of oil and gas, promote the significant findings of oil and gas, accelerate theproductivity construction, improve the recovery rate of oil and gas. The ultrasonic assisted extraction technology as an effective means of stimulation which has the advantage of low cost, simple process, less equipment, wide application range, no formation damage, no pollution, has been paid widly attention to by the petroleum industry in recent years. This paper summarizes and analysis the stimulation mechanism when ultrasonic effect on the well, discuss the energy distribution of the ultrasonic basing on the energy balance theory. Take the Bundle of capillary tubes porous media as studying model, consider the role of viscous fluid for absorption and attenuation of ultrasonic. Establishment the ultrasonic spreading model, investigate the rule of absorption and attenuation of ultrasonic in the oil layer and porous media layer, and the relationship about layer’s parameters. In the process of cylindrical transducer sound source acoustic field’s communication,in most cases the geological parameters are changing, so this paper will take the form of multi porous media layer, explore the distribution of acoustic field witch is more close to the reality. |
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