油水体系中防聚剂对水合物形成的影响研究  

Study on the effect of anti⁃agglomerants on hydrate formation in oil⁃water systems

作　　者：郭东东 吉凌 朱恒银 GUO Dongdong;JI Ling;ZHU Hengyin(School of Earth and Environment,Anhui University of Science&Technology,Huainan Anhui 232001,China;School of Civil Engineering and Architecture,Anhui University of Science&Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232000 [2]安徽理工大学土木建筑学院,安徽淮南232000

出　　处：《钻探工程》2023年第S01期113-120,共8页Drilling Engineering

基　　金：安徽省自然科学基金青年项目(编号:2308085QE151);安徽理工大学高层次引进人才科研启动基金资助(编号:2022yjrc58);安徽省深地钻探工程研究中心开放基金资助(编号:2022AHSD04)。

摘　　要：防聚剂(AAs)可以降低深水油气输送管线和钻井作业中水合物堵塞风险。AAs吸附在水合物颗粒上使其分散从而防止聚集,但AAs对水合物的成核和生长影响尚不清楚。因此,本文研究了油水体系中一系列AAs对甲烷水合物形成动力学的影响,获得了体系中水合物的诱导时间、形成量和形成速率。结果表明,在纯水(100%)和高含水率(95%)油水体系中,AAs会促进水合物的形成;而在相对较低含水率(20%和60%)油水体系中,AAs会减缓甚至完全抑制水合物的成核和生长,这可能主要是由于AAs的传质位阻效应。该研究将有助于揭示AAs对水合物防聚的动力学抑制机制,对多相流混输和深水油气勘探的安全实施具有重要意义。The addition of anti‑agglomerants(AAs)is a promising solution for mitigating gas hydrate risks in deep water hydrocarbon flowlines and drilling operations.AAs have the ability to adsorb onto small hydrate particles,promoting their dispersion and preventing agglomeration.However,the exact influence of AAs on hydrate nucleation and growth during this process remains unclear.Here,we investigated various types and concentrations of AAs to elucidate their effect on the formation kinetics of CH4 hydrate.We measured the induction time,amount of hydrate formation,and average rate of hydrate growth in these systems.The results demonstrate that AAs can enhance hydrate formation in pure water(100%)and high water cut(95%)systems.Conversely,in systems with relatively low water cut(20%and 60%),AAs impede or even completely inhibit hydrate nucleation and growth under our experimental conditions.This inhibition is likely attributed to the mass transfer barrier associated with AAs.By shedding light on the kinetic inhibition mechanism of AAs on hydrate agglomeration,this study contributes to the safe implementation of multiphase flow transportation and deep water oil and gas exploration,and holds significance for these endeavors.

关 键 词：甲烷水合物 防聚剂 形成动力学 油水体系 

分 类 号：P634[天文地球—地质矿产勘探] TE25[天文地球—地质学]