Study of asphaltene dispersion and removal for high-asphaltene oil wells

作     者：Chen Chaogang Guo Jixiang An Na Pan Yangqiu Li Yaguang Jiang Qingzhe 

作者机构：China University of PetroleumBeijing 102249China Key Laboratory of Shale Gas ExplorationMinistry of Land and ResourcesChongqing Institute of Geology and Mineral ResourcesChongqing 400042China Northwest Oilfield Branch Engineering and Technology Institute of SinopecUmmchi 830011China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2012年第9卷第4期

页      面：551-557页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：the National High Technology Research and Development Program of China (No.SS2013AA060801) National Natural Science Foundation of China (No.51274210) 12th National Science and Technology Major Project of Ministry of Science and Technology of China (No. 20112X05049-003-001-002)for financial support 

主　　题：Asphaltenes asphalthene dispersion and removal blockages oil well evaluation 

摘      要：Many wellbores are blocked by asphaltene deposits,which lead to production problems in the oilfield development *** this paper,methods such as elemental analysis,and solvent extraction are adopted for the study of wellbore *** content of organic matter in blockages is higher than 96% and asphaltene is the main component of the organic matter with n-heptane asphaltene content of 38%.Based on the above analyses,an agent for asphaltene dispersion and removal（named as SDJ） was *** performance of the SDJ agent was evaluated,and it was found that the dissolution rate of asphaltene can reach 2.9 ***-1 at 60 *** agent（1wt%） was added to crude oil with a colloid instability index greater than 0.9 can effectively inhibit asphaltene deposition in the *** the viscosity method,the dissolution amount of SDJ agent was calculated,and it was found that when the viscosity of the system is around 2,000 mPa.s（the common viscosity of crude oil）,the amount of SDJ agent added to the blockage was at least 96 g per 100 g ***,SDJ agent has promising application for dispersion and removal of asphaltene deposition in high-asphaltene wells.