中国石油大学学报（自然科学版）2018，Vol.42Issue(3)：70-80,11.DOI:10.3969/j.issn.1673-5005.2018.03.009
基于局部平衡反应的海底甲烷水合物形成及富集机制数值模拟
Numerical simulation of methane hydrate accumulation in subsea sediments based on a partial-equilibrium reaction model
摘要
Abstract
Aiming at subsea gas hydrate reservoirs formed via a seepage-type gas migration,a hydrate formation and accumu-lation model in subsea sediments was established using a reservoir simulation method. Based on the phase equilibrium and re-action kinetics of methane hydrate in sea water,the process of hydrate formation during methane migrating into the upper hy-drate stability zone from a deep gas reservoir was realized,in which a partial-equilibrium setting of the hydrate reaction model and high-pressure and low-temperature of the subsea sediments were considered. The effects of different influence factors on methane migration and hydrate formation are analyzed,and a low-permeability barrier case and a leakage case were consid-ered. The simulation results show that low flux of methane gas, cap rock barrier, large water depth, and small geothermal gradient below the mud line are beneficial to the formation of large and thick hydrate reservoirs with high hydrate saturation. It has been also proved that conventional reservoir simulation method can be used as an effective tool to study the hydrate ac-cumulation mechanisms,which deserve for further development and utilization.关键词
水合物/反应动力学/数值模拟/海底冷泉/富集成藏Key words
gas hydrate/reaction kinetics/numerical simulation/cold vent at seabed/hydrate accumulation分类
海洋科学引用本文复制引用
张亮,李欣,许素丹,宫智武,任韶然..基于局部平衡反应的海底甲烷水合物形成及富集机制数值模拟[J].中国石油大学学报（自然科学版）,2018,42(3):70-80,11.基金项目
中央高校基本科研业务费专项(15CX05036A) （15CX05036A）
国家"973"重点基础研究发展计划项目(2015CB251201) （2015CB251201）
大学生创新训练项目(201610425008) （201610425008）
