Numerical Validation of Asphaltene Precipitation and Deposition during CO2 miscible flooding

作     者：Fahad I.Syed Shahin Neghabhan Arsalan Zolfaghari Amirmasoud K.Dahaghi Fahad I.Syed;Shahin Neghabhan;Arsalan Zolfaghari;Amirmasoud K.Dahaghi

作者机构：University of KansasUSA ADNOC OffshoreUAE 

出 版 物：《Petroleum Research》 (石油研究（英文）)

年 卷 期：2020年第5卷第3期

页      面：235-243页

核心收录：

学科分类：081702[工学-化学工艺] 0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0816[工学-测绘科学与技术] 

基　　金：ADNOC Offshore Department of Chemical and Petroleum Engineering, University of Kansas 

主　　题：Asphaltene AOP AOC EOS Tuning Asphaltic fluid&CO2 field problems 

摘      要：Asphaltene precipitation,flocculation,and deposition can significantly reduce oil production by impacting wellbores,flowlines,and more importantly,formations’pore space around the *** alteration in the temperature,pressure and fluid composition can trigger asphaltene *** ability to predict the occurrence and magnitude of the asphaltene deposition is a major step for flow *** accurate prediction of the deposition envelope enables the operator to systematically categorize different cases based on their impact on the *** critical knowledge can be used to predict the occurrence and magnitude of asphaltene deposition,which could potentially save the expense of installing unnecessary equipment and injecting chemical inhibitors when they are not *** asphaltene-related flow assurance issues requires robust physically-based modeling capabilities for capturing the asphaltene’s deposition tendencies as a function of the prevailing field’s operating *** available simulators are found to be useful for predicting asphaltene’s phase behavior,precipitation tendency,and instability curves,they often overlook important physical characteristics of the *** properties may have a detrimental role in obtaining a realistic representation of the asphaltene deposition *** this paper,the experimental and the numerical investigations are combined to present a comprehensive methodology for studying the thermodynamics of asphaltene precipitation and deposition.A wide range of pressures and CO2 concentrations are covered that are relevant to actual CO2 flooding in a Middle East oil *** do so,a series of lab experiments including routine and special PVT analyses where the Asphaltene Onset Pressure(AOP)and Saturation Pressures(Psat)were measured for different mixtures of CO2 and the reservoir *** of 50 mol%CO2 concentration mixture was tested to measure the AOP and *** amount of asphaltene