Multiphase Transmission Technology And Its Application

With the exploration and exploitation petroleum to the area of the ocean, desert and polar region, the multiphase flow technology has been applied in many occasion. The multiphase mixture transportation technology became the research hotspot to oil-gas storage and transportation subject Multiphase mixture transportation has many characteristics differenced from single phase transportation. So we must fully and scientifically realized the special disciplinarian of the multiphase flow. Based on it, we can better design and administer the multiphase flow pipelines. These days, there are many technology worth while research about the techniques calculation and simulation method .Because of these, much content were researched in this paper, including thermal properties models of fluid, the method to divide the flowing type, multiphase flow models, constitutive equations and so on. At the same time, We designed, on-line simulation system and developed off-line simulation software of multiphase flow. All in all, several parts were discussed in this paper:At the first part, thermal properties models of the hydrocarbon fluids were gotten by researching thermal properties of the hydrocarbon fluid which we used. In this paper, thermal properties models which about the wet natural gas, oil-gas two phase, oil-gas-water three phase mixture fluids were discussed.At the second part, the detailed methods about the oil-gas two phase pipelines of horizontal, incline and vertical were provided by experiment and flow mechanistic analysis. Oil-water two phase and oil-gas-water three phase flow pattern dividing methods were provided in the horizontal and vertical pipelines.At the third part, based on the basic differential equation of the multiphase flow, all kinds of flow models were acquired by the different assumption condition. The author provided the arithmetic method to every sort models. It was the base to techniques calculate. At the same time, through these models and arithmetic method, we can compile the multiphase flow pipeline software.At the fourth part, the multiphase flow geometrical models were set up by multiphase pipe flow characteristics. The geometrical variables were analyzed in multiphase pipe flow, the methods of solving the practical flow pattern geometrical variables were summarized. At the same time, the author detailed analyzed slug flow in oil-gas two phase pipelines.At the fifth part, based on the online simulation system of the oil or gas single phase pipeline, the multiphase flow online simulation system was designed. The author detaileddiscussed the method of the numeral signal process which was rarely discussed in storage and transportation researching field. In addition, the off-line simulation software which author developed was also explained in this paper.In a word, the content which including design, calculation and simulation software .about the multiphase mixture transportation were researched in this paper. Some theoretic and analysis methods were developed. The theoretical researching and applied significations to other multiphase mixture transportation techniques analysis system.