压裂过程射孔孔眼冲蚀动态演化过程数值模拟  

Dynamic Evolution of Perforation Erosion During Sand Fracturing Based on CFD-DEM Simulation

作　　者：王治国[1,2,3] 阳光 翁定为 高跃宾[4] 李帅[4] 张锋[1] 苏晓辉 WANG Zhiguo;YANG Guang;WENG Dingwei;GAO Yuebin;LI Shuai;ZHANG Feng;SU Xiaohui(College of New Energy,Xi'an Shiyou University,Xi'an 710065,China;Research Institute of Exploration and Development,PetroChina,Beijing 100083,China;Engineering Research Center of Smart Energy and Carbon Neutral in Oil&Gas Field,Universities of Shaanxi Province,Xi'an710065;Key Laboratory of Xi'an City for Wellbore Integrity Evaluation,Xi'an 710065)

机构地区：[1]西安石油大学新能源学院,西安710065 [2]油气田智慧能源与碳中和陕西省高校工程研究中心,北京100083 [3]西安市井完整性重点实验室,西安710065 [4]中国石油勘探开发研究院,西安710065

出　　处：《工程热物理学报》2024年第4期1031-1037,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.52074220);西安石油大学研究生创新与实践项目(NoCS22213127)。

摘　　要：在套管加砂压裂阶段,由于支撑剂对射孔孔眼的冲蚀,导致孔眼摩阻骤降,同时伴随着严重的扩径与变形。为此,基于Rocky DEM方法探究孔眼的冲蚀动态演化过程和孔眼摩阻衰减规律。结果表明,孔眼的冲蚀变形包括孔肩冲蚀和扩径冲蚀两个阶段。在排量20 m^(3)/min、砂含量150 kg/m^(3)、100目石英砂的模拟条件下,孔眼摩阻的衰减主要发生在孔肩冲蚀阶段。在0~500 s之间,孔眼摩阻由冲蚀前的15.88 MPa降低至4.41 MPa。During the sand fracturing stage,severe diameter expansion and deformation was occurred as the erosion of the perforations by the proppant,in result of reducing the friction of the perforations.In this work,the Rocky DEM method was used to investigate the dynamic evolution process of perforation erosion and the attenuation law of perforation friction.The results show that the erosion deformation of the perforation includes two stages:perforation shoulder erosion and diameter expansion erosion.Under the simulation conditions of displacement 20 m^(3)/min,sand content 150 kg/m^(3),and 100 mesh quartz sand,the attenuation of perforation friction mainly occurs in the perforation shoulder erosion stage.Between 0~500 s,the perforation friction decreased from 15.88MPa before erosion to 4.41 MPa.

关 键 词：CFD-DEM 加砂压裂 冲蚀变形 孔眼摩阻 动态演化过程 

分 类 号：TE357[石油与天然气工程—油气田开发工程]