通道压裂支撑剂缝内分布规律研究  

Research on the Proppant Distribution in Fractures from Channel Fracturing

作　　者：刘承婷[1,2] 胡传峰 王智刚 董佩鑫 彭占刚[3] 管恩东 LIU Chengting;HU Chuanfeng;WANG Zhigang;DONG Peixin;PENG Zhangang;GUAN Endong(School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang China;Key Laboratory of Enhanced Oil and Gas Recovery(Northeast Petroleum University),Ministry of Education,Daqing 163318,Heilongjiang China;The First Oil Production Plant,PetroChina Daqing Oilfield Co.Ltd.,Daqing 163001,Heilongjiang China;Gaosheng Oil Production Plant,Liaohe Oilfield Company,Panjin 124099,Liaoning China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]提高油气采收率教育部重点实验室(东北石油大学),黑龙江大庆163318 [3]中国石油大庆油田有限责任公司第一采油厂,黑龙江大庆163001 [4]辽河油田公司高升采油厂,辽宁盘锦124099

出　　处：《河南科学》2024年第1期8-15,共8页Henan Science

基　　金：中国石油创新基金资助项目(2019D-5007-0205)。

摘　　要：通道压裂是低渗透致密油气藏高效、低成本开发的关键技术,通过采用非连续簇团铺砂的方式,使裂缝中形成具有高导流能力的通道,但目前关于通道压裂的理论研究仍然处于起步阶段.因此,基于计算流体力学建立欧拉-欧拉固液两相流模型,对通道压裂过程中支撑剂的分布状态进行模拟,通过与实验结果进行对比,证明了所建立模型的有效性,并系统研究了不同中顶压裂液(纯压裂液脉冲段)黏度、支撑剂密度、泵注排量对通道压裂通道率的影响.结果表明,中顶压裂液的黏度从1 mPa·s增加到20 mPa·s,通道内平均通道率增加5%;支撑剂密度从1400 kg/m^(3)增加到2000 kg/m^(3)时,缝内通道率减小了7%;排量由3 m^(3)/min增加到7 m^(3)/min时,通道率由28%增加到33.5%后减小到31%.现场应用过程中应使用较高黏度中顶压裂液、较低密度支撑剂和合理的泵注排量以保证裂缝中形成有效支撑通道.Channel fracturing is a crucial technology for the efficient and economical development of low-permeability tight oil and gas reservoirs.High-conductivity channels can be formed in fractures through the technique of discontinuous cluster sand laying.However,theoretical research on channel fracturing is still nascent.Utilizing computational fluid dynamics,this paper establishes a Euler-Euler solid-liquid two-phase flow model to simulate proppant distribution during channel fracturing.The effectiveness of the model was validated by comparison with experimental results.The effects of varying mid-top fracturing fluid viscosity,proppant density,and pumping rates on channel fracturing efficiency were systematically investigated.As the mid-top fracturing viscosity of fluid increased from 1 mPa·s to 20 mPa·s,the average channel passage rate increased by 5%.An increase in proppant density from 1400 kg/m^(3) to 2000 kg/m^(3) resulted in a 7%decrease in the in-seam passage rate.As displacement increased from 3 m^(3)/min to 7 m^(3)/min,the channel rate rose from 28%to 33.5%,before decreasing to 31%.In practical applications,utilizing high-viscosity,low-density proppants,and an optimal pumping rate is recommended to ensure effective propping of channels in fractures.

关 键 词：通道压裂 支撑剂 固液两相流 携砂规律 参数优化 

分 类 号：TE357[石油与天然气工程—油气田开发工程]