摘要：In order to promote the operational safety level of the subsea multiphase flow transportation system in the oil and gas development of deep-water fields, and to push the industrialization application of the hydrate slurry transportation technology, based on the hydrate flow experiment platform of China University of Petroleum (Beijing), combined with the kinetics mechanism of hydrate formation, the theories of multiphase flow and reliability, the theory and technology of multiphase flow involving hydrate plugging risks in multiphase pipeline containing hydrate were investigated. The following results are obtained. (1) The presence of hydrate particles can reduce the stratified flow area, enhance slug flow, and form annular and wave flow easily, and the criteria for stratified flow established by the small perturbation method can distinguish the experimental flow pattern data reasonably. (2) Considering the coalescence shear between hydrate particles and combined with the effective medium theory, the calculation methods for viscosity and resistance of hydrate slurry were established with the prediction accuracy within ±20%. (3) The critical suspension flow rate of hydrate multiphase pipeline transport was proposed, and the mechanism models of gas-slurry (below the critical rate) and solid-liquid (above the critical rate) multiphase flow were established respectively, which could more reasonably describe the coupling effect of hydrate particles and multiphase flow. (4) Four stages of hydrate wall deposition were observed, and through quantitative cha-racterization and analysis of hydrate deposition rates under different experimental conditions, the mechanism of various factors on hydrate wall deposition was revealed. (5) The coalescence and deposition state of hydrate particles in different flow patterns were analyzed quantitatively, and the plugging mechanism and risks of hydrate particles in different flow patterns were analyzed qualitatively. (6) By introducing the reliability theory, the limit state equation based on the hydrate volume fraction was established, and coupled sampling and rapid solution methods, the hydrate plug probability of the multiphase transport pipeline could be predicted, and the classification principle of the safety evaluation for hydrate slurry pipeline were addressed. In conclusion, the theory and technology of multiphase flow involving hydrate plugging risks can effectively predict the risks of hydrate formation and blockage in the multiphase pipelines from both qualitative and quantitative aspects, which is not only the fundamental theory for the application of hydrate slurry transportation technology, but the key to the subsea multiphase flow assurance in the deep-water oil and gas development.
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ISSN号：1000-0976

卷、期、页：v 40,n 12,p133-142

发表日期：2020-12-25

收录情况：EI（工程索引）

发表期刊名称：Natural Gas Industry

通讯作者：陈玉川

第一作者：宫敬,史博会,宋尚飞

论文类型：期刊论文

论文概要：宫敬,史博会,陈玉川,宋尚飞，Submarine multiphase pipeline transport containing natural gas hydrate and its plugging risk prevention and control，Natural Gas Industry，2020，v 40,n 12,p133-142

论文题目：Submarine multiphase pipeline transport containing natural gas hydrate and its plugging risk prevention and control