The Application Research Of The Ultrasonic Applied To Static Heavy Oil Cracking

Our country began to accelerate the development of heavy oil resources in recentyears. The national basic research development plans and major scientific researchprogram(973program) invested heavily in the field of energy science,especially theresearch of the theory about the low permeability and dense oil’s development andnew methods to improve oil recovery rate. The main content of this article is theapplication research of ultrasonic applied to static heavy oil cracking.In this article we raise a new experience algorithm to estimate the moleculesbond energy of heavy oil molecules, according to the factors affecting bond energyincluding the neighboring interactions and conjugation effect. We also analyze threetransmission modes of ultrasonic in the heavy oil, including the plane waves,spherical waves and cylindrical waves. The ideal model is plane waves which areparalleled to each other and not descending along with the propagation distanceincreasing. The amplitude of cylindrical waves is inversely proportional relationshipto the square root of the radius, while the amplitude of spherical waves is inverselyproportional relationship to the radius. We obtain the equations of pressure, velocityand acceleration of cylindrical waves and spherical waves by solving the waveequation of different patterns. Using the acceleration, we get the equation of the forcesbetween an atom and a molecular without this atom in heavy oil molecules. Weanalyze the factors of ultrasonic transmission attenuation in heavy oil medium anddraw their curves. Also we know the relationship between the ultrasonic pressure andpropagation distance of cylindrical waves and spherical waves. By using Matlab, wecalculate the energy of each molecule absorbing when ultrasonic transmit in heavy oilmedium and analyze the relationship of the heavy oil cracking and energy.