The deposition of asphaltenes under high-temperature and highpressure (HTHP) conditions  

作　　者：Rui-Ying Xiong Ji-Xiang Guo Wyclif Kiyingi Hai-Xia Xu Xin-Peng Wu 

机构地区：[1]Unconventional Petroleum Research Institute,China University of Petroleum,Beijing,102249,China [2]Petroleum Engineering Research Institute of Tarim Oilfield,China National Petroleum Corporation,Xinjiang,84100,China

出　　处：《Petroleum Science》2023年第1期611-618,共8页石油科学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(No.52174047);the China Scholarship Council(No.202106440102);the PetroChina Strategic Cooperation Science and Technology Project(No.ZLZX 2020-01).

摘　　要：In this work,the factors affecting asphaltenes deposition in high-temperature and high-pressure wells were studied using backscattered light and PVT equipment customized to suit the well conditions.In an examination of the intensity of backscattered light,it was revealed that there exists a linear relationship between temperature and asphaltene precipitation within a specific temperature range.Within this range,a decrease in temperature tends to accelerate asphaltene precipitation.However,the impacts of pressure and gas-oil ratio are more pronounced.The pressure depletion induces the asphaltenes to precipitate out of the solution,followed by the formation of flocs below the bubble point.In addition,an increase in the gas-oil ratio causes a more severe asphaltene deposition,shifting the location of asphaltenes to deep well sections.

关 键 词：HTHP reservoir ASPHALTENE AGGREGATION Gas-oil ratio HTHP PVT cell Back-scattered light 

分 类 号：TE624[石油与天然气工程—油气加工工程]