深水气井水合物流动障碍形成机制与防治方法研究进展  

Research Progress on Formation Mechanism and Prevention Methods of Hydrate Flow Barrier in Deep-water Gas Wells

作　　者：王志远[1] 张洋洋[1] 张剑波 童仕坤 孙宝江[1] Wang Zhiyuan;Zhang Yangyang;Zhang Jianbo;Tong Shikun;Sun Baojiang(College of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580)

机构地区：[1]中国石油大学(华东)石油工程学院,青岛266580

出　　处：《中国科学基金》2021年第6期992-1005,共14页Bulletin of National Natural Science Foundation of China

基　　金：国家自然科学基金项目(51991363,51974350);中国石油天然气集团有限公司重大科技专项(ZD2019-184-003);教育部创新团队项目(IRT_14R58)的资助。

摘　　要：明晰深水气井水合物流动障碍形成机制并依此提出水合物防治方法对深水油气开发至关重要。目前国内外关于水合物流动障碍形成机制的理论与实验研究众多,但多集中在油气集输管线内的油基、水基等富液相体系,因此,针对深水气井内的气主导体系进行水合物流动障碍形成机制与防治方法的总结归纳是适宜的且意义重大。本文基于水合物生成、水合物颗粒聚并、水合物沉积、沉积层剥落、沉积层变厚最终堵塞井筒的流动障碍演化共识,概括分析了深水气井水合物流动障碍形成机制。针对完全抑制水合物防治方法的应用不足,总结了两种非完全抑制的防治方法,这些新型的水合物防治思路对深水油气安全高效开发具有一定借鉴意义。It is very important for oil and gas developments to clarify the formation mechanism of hydrate flow barriers and to put forward corresponding methods for hydrate prevention in deep-water gas wells.At present,there are many theoretical and experimental studies on the formation mechanism of hydrate flow barriers at home and abroad,but most of them focus on the analysis of the riched-liquid phase(oil-based system,water-based system)in oil-gas gathering and transportation pipeline.Therefore,it is appropriate and significant to summarize the formation mechanism and prevention methods of hydrate flow barriers for the gas-dominated system in deep-water gas wells.Based on the evolution consensus of hydrate formation of flow barrier,coalescence of hydrate particles,hydrate deposition,sloughing of deposition layer,thickening of deposition layer,and final hydrate plugging,this paper summarizes and analyzes the formation mechanism of hydrate flow barrier in deep-water gas wells.Given the shortcomings of the existing hydrate prevention methods based on complete inhibition,this article also proposes two methods based on incomplete inhibition.These novel ideas of hydrate prevention have a certain significance for the safe and efficient developments of deep-water oil and gas.

关 键 词：深水气井 水合物生成 水合物沉积 水合物剥落 水合物堵塞 水合物防治 

分 类 号：TE5[石油与天然气工程—油气田开发工程]