摘要
针对油田进入中高含水开发期,提高采收率效果差的难题,提出采用一种复合离子型调堵剂进行双向调堵实验的方法并对其进行可行性分析。以调堵剂溶液的黏度变化为指标评价了该调堵剂的性能,通过室内岩心驱替实验对其进行了工艺参数优化。结果表明,该体系耐温可达70℃,耐盐100 g/L,封堵性能良好,一定条件下,当裂缝宽度为0.5 mm可承压19.49 MPa,当渗透率为100 mD的岩心承压达15.16 MPa。该调堵剂体系可满足双向封堵技术要求,为进一步提高采收率提供有力的技术支撑。
In response to the problem of poor recovery efficiency in oil fields entering the stage of medium to high water content development,this paper proposes the use of a composite ion type plugging agent for bidirectional plugging experiments.The performance of the plugging agent was evaluated based on the viscosity change of the plugging agent solution,and the process parameters were optimized through indoor core displacement experiments.The results show that the system can withstand temperatures up to 70℃,salt up to 100 g/L,and has good sealing performance.Under certain conditions,when the crack width is 0.5 mm,it can bear pressure of 19.49 MPa,and when the permeability of the rock core is 100 mD,it can bear pressure of 15.16 MPa.This plugging agent system can meet the requirements of bidirectional plugging technology and provide strong technical support for further improving oil recovery.
作者
张腾换
张涛
王同丁
唐凡
王燕
张煜
ZHANG Tenghuan;ZHANG Tao;WANG Tongding;TANG Fan;WANG Yan;ZHANG Yu(Oil&Gas Technology Research Institute Changqing Oilfield Company,Xi’an 710018,China;CCDC Changqing Well Cementing Company,Xi’an 710018,China;College of Chemistry and Environmental Engineering,Hubei Minzu University,Enshi 445000,China)
出处
《应用化工》
CSCD
北大核心
2024年第11期2528-2532,共5页
Applied Chemical Industry
基金
国家自然科学基金(52374029)。
关键词
调堵剂
双向调堵
调堵机理
参数优化
plugging agent
bidirectional blocking adjustment
plugging mechanism
parameter optimization
