基于CFD-DEM算法的复杂裂缝支撑剂运移模拟分析
Simulation and Analysis of Proppant Transport in Complex Fractures Based on CFD-DEM Algorithm
刘承婷 1隗鸿飞 1姜福聪 2王璐娜 1李飞飞1
作者信息
- 1. 东北石油大学石油工程学院,黑龙江 大庆 163318;东北石油大学提高油气采收率教育部重点实验室,黑龙江 大庆 163318
- 2. 大庆油田采油七厂地质研究所,黑龙江 大庆 163517
- 折叠
摘要
为了研究裂缝内支撑剂的运移特性,应用计算流体力学-离散元(CFD-DEM)耦合模拟技术来模拟复杂裂缝中的支撑剂运移情况.通过控制单一变量法,研究了流速、支撑剂体积分数及压裂液黏度3个参数对于支撑剂运移的影响.结果表明:适当提高支撑剂体积分数有助于提高其携液能力进而提高压裂效果;较高的注入速度会使支撑剂在入口较远处沉降,因此适当提高注入速度会促进裂缝的扩展和延伸;较高的黏度会使支撑剂在出口流出,选取适当的黏度有利于提高油气的渗透性和采收率.
Abstract
In order to investigate the transport characteristics of proppants in fractures,the computational fluid dynamics-discrete element method(CFD-DEM)coupled simulation technique was applied to simulate the transport of proppants in complex fractures.By controlling By controlling the univariate method,the effect of three parameters,namely flow velocity,proppant concentration,and fracturing fluid viscosity,on proppant transport were studied.The results showed that,properly increasing the proppant volume fraction helped to improve its carrying capacity and thereby enhance the fracturing effect;higher injection speeds caused the proppant to settle further away from the inlet,so properly increasing the injection speed could promote the expansion and extension of the fracture;higher viscosity caused the proppant to flow out of the outlet,and selecting the appropriate viscosity was beneficial to improve the permeability and recovery rate of oil and gas.
关键词
体积压裂/运移特性/计算流体力学/粒子/携砂流动/数值模拟Key words
Hydraulic fracturing/Transport characteristics/Fluid mechanics/Particle/Proppant transportation/Numerical simulation引用本文复制引用
基金项目
黑龙江省重点研发计划项目(GA23A914)
出版年
2024
NETL
NSTL
万方数据