西安石油大学学报（自然科学版）2025，Vol.40Issue(3)：66-74,9.DOI:10.3969/j.issn.1673-064X.2025.03.007
CO2混相压裂地面管汇冲蚀磨损特性
Study on Erosion Characteristics of Ground Manifold for CO2 Miscible Fracturing
摘要
Abstract
In order to study the erosion wear behavior and law of ground manifold under the complex coupling condition of CO2 miscible fracturing,the mechanical properties of ground manifold material(15CrNiMo)at low temperature from-40 ℃ to normal temperature(23℃)were tested,and then the erosion wear characteristics and damage mechanism of 15CrNiMo at different impact velocity,impact angle and sand content were studied.The results show that the surface hardness,tensile/yield strength and fracture toughness of 15CrNiMo alloy steel increase with the decrease of temperature in the low temperature range of CO2 miscible fracturing,and the de-crease of temperature will not adversely affect the erosion resistance of ground manifold.The erosion rate of 15CrNiMo increases with the increase of impact angle,reaches the peak at about 30°,then decreases and gradually tends to be stable.There is a clear positive corre-lation between erosion rate and impact velocity.When the sand content is between 5％ and 15％,due to the"shielding effect",the ero-sion rate gradually decreases with the increase of sand content and eventually stabilizes.When the internal pressure load is 60～100 MPa,the erosion rate increases approximately linearly with the increase of tensile load.The research results can provide a basis for the optimization of CO2 miscible fracturing operation parameters and the prediction of ground fracturing manifold life.关键词
冲蚀磨损/CO2混相压裂/地面管汇/力学性能Key words
erosion wear/CO2 miscible fracturing/ground manifold/mechanical properties分类
石油、天然气工程引用本文复制引用
高凯歌,卢书彤,闫柯乐,靳彦欣,任悦萌,蒋秀..CO2混相压裂地面管汇冲蚀磨损特性[J].西安石油大学学报（自然科学版）,2025,40(3):66-74,9.基金项目
国家自然科学基金青年项目"构造应力集中区水力压裂诱发断层滑移及套管剪切变形动力学机理研究"(52304017) （52304017）
中国石化基础前瞻项目"页岩油超临界CO2压裂与生产中材料腐蚀冲蚀机制及控制技术研究"(321044) （321044）
