摘要
酸化常用于解除伤害和增加储层渗透率。在碳酸盐岩储层中,这一过程通常采用基于黏弹性表面活性剂(VES)的转向酸。VES转向酸配方可以对[H^(+)]和[Ca^(2+)]的变化做出响应,从而调节表面活性剂溶液的流变性。当黏度增加时,流体会改变其流动方向,形成虫洞。构建了酸液中和的体系,并使用2种商用转向酸进行了测试,研究了不同中和度下流体的流变性,模拟了流体在碳酸盐基质中流动和反应时的行为。此外,还研制了基于VES的新型响应性转向酸ZX,并研究了它们在不同[H^(+)]和[Ca^(2+)]下的线性和非线性流变性,并在岩心驱替实验中评估了其性能,实验结果表明新型转向酸形成了优势虫洞。
Acidizing is commonly used to relieve damage and increase reservoir permeability.In carbonate reservoirs,this process is commonly performed using viscoelastic surfactant(VES)-based steering acids.VES steering acid formulations can respond to changes in[H^(+)]and[Ca^(2+)]to modulate the rheology of the surfactant solution.When the viscosity increases,the fluid changes its flow direction and forms wormholes.In this paper,a system for acid-liquid neutralization was constructed and tested using two commercial steering acids to investigate the rheology of the fluid at different degrees of neutralization and to simulate the behavior of the fluid as it flowed and reacted in a carbonate matrix.In addition,new responsive steering acids based on VES,named ZX,were developed and their linear and nonlinear rheology was investigated at different[H^(+)]and[Ca^(2+)],and their performance was evaluated in core replacement experiments.The experimental results showed that these novel steering acids formed desirable dominant wormholes.
作者
李延生
王建新
张军
李明
张刚
LI Yansheng;WANG Jianxin;ZHANG Jun;LI Ming;ZHANG Gang(Xingzichuan Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Ansai Shaanxi 717499,China;Fuxian Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Fuxian Shaanxi 727500,China;Yan'an Shengke Industry&Trade Co.,Ltd.,Yan'an Shaanxi 716000,China;Wuqian Banner Superintendent Station,Engineering Supervision Department,Changqing Oilfield Branch,Wuqian Banner,Inner Mongolia 017300,China)
出处
《当代化工》
CAS
2024年第9期2119-2123,共5页
Contemporary Chemical Industry
基金
陕西省教育厅科技专项计划项目(项目编号:2024JDTD0018)。
关键词
转向酸
表面活性剂
酸化
解堵
响应性
界面
界面流变学
表面活性剂
Steering acids
Surfactants
Acidification
Plugging removal
Responsiveness
Interface
Interfacial rheology
Surfactants
