天然气工业2017，Vol.37Issue(5)：38-45,8.DOI:10.3787/j.issn.1000-0976.2017.05.005
多孔介质中天然气水合物生成的主要影响因素
Major factors influencing the formation of natural gas hydrates in porous media
摘要
Abstract
Current researches related to natural gas hydrate mainly focus on its physical and chemical properties,as well as the approach to the production (decomposition) of hydrates.Physical modeling of the seepage process in hydrate deposits is critical to the study on the exploitation or decomposition of hydrates.However,investigation of the dynamic hydrate process by virtue of porous medialike sandpacked tubes which are widely used in petroleum production research is rarely reported in literatures.In this paper,physical modeling of methane hydrate generation process was conducted using river sandpacked tubes in the core flooding apparatus.During the simulation,the influences of parameters such as reservoir temperature,methane pressure and reservoir model properties on the process of hydrate generation were investigated.The following results are revealed.First,the use of ice-melted water as the boundwater in the reservoir model can significantly enhance the rate of methane hydrate generation.Second,the process driving force in porous media (i.e.,extents to which the experimental pressure or temperature deviating those corresponding to the hydrate phase equilibrium) plays a key role in the generation of methane hydrates.Third,the induction period of methane hydrate generation almost does not change with temperature or pressure when the methane pressure is above 1.4 folds of the hydrate phase equilibrium pressure or the laboratory temperature is lower than the phase equilibrium temperature by 3 ℃ or more.Fourth,the parameters such as permeability,water saturation and wettability don't have much influence on the formation of methane hydrates.关键词
甲烷水合物/多孔介质/生成过程/天然气水合物地层/物理模拟/影响因素/诱导期/生成率Key words
Methane hydrate/Porous media/Formation process/Gas hydrate deposits/Physical modeling/Factors/Induction period/Ratio of formation引用本文复制引用
KhlebnikovV.N.,AntonovS.V.,MishinA.S.,梁萌,KhamidullinaI.V.,ZobovP.M.,LikhachevaN.V.,GushchinP.A...多孔介质中天然气水合物生成的主要影响因素[J].天然气工业,2017,37(5):38-45,8.基金项目
俄罗斯联邦教育与科学部基金项目“用于天然气水合物开采及温室气体封存的复合抑制剂的开发”(编号:14.577.21.0233 （）
唯一识别码:RFMEFI57716X0233). （）
