{"title":"Modeling and Simulating Multi-Polymer Injections","authors":"C. Preux, I. Malinouskaya, Q. Nguyen, R. Tabary","doi":"10.2118/190759-MS","DOIUrl":null,"url":null,"abstract":"\n In a process of enhanced oil recovery (polymer flooding), of well treatment (conformance control, water shut-off) or eventually any other process, the injection of several types of polymer solutions can be envisioned. Polymers considered could have different chemical structure, may not have been dissolved in the same water and may not necessarily be injected in a single and unique well. The same question appears in connection with a method where a mixture of two (or more) polymers would be intentionally injected. The few studies available involve mixtures of polymers in organic solvents.\n We could not find a study dedicated to an injection of a blend of polymers in porous media. Only a theoretical paper by V.P. Budtov [1] drew our attention, focusing on the estimation of the relative viscosity of a mixture of several polymers. Its main message is that, in order to make sense, the mixture is assumed as a single homogeneous phase, at least in a given area of concentration. The adsorption of several \"polymer\" components raises a difficult question about the so-called competitive adsorption.\n There are two opposite answers. In the first one, at the laboratory scale, chemical interactions on the rock surface are instantaneous (\"first come, first adsorbed\"). According to the other one, at the reservoir scale, exchanges have all the time necessary to occur and they take place in the direction of a preferential adsorption of the stronger mass or higher affinity polymer (\"hierarchical model\"). In this paper, we present a complete modeling and simulation of multi-polymer injection(s), based on physical data. The concepts of mobility reduction and adsorption are studied and validated through some test cases. In particular, the effect of multi-polymer injection(s) on adsorption is investigated. In the first part, we introduce the mathematical system and the method used to solve it. The second part addresses the modeling of different parameters such as mobility and permeability reduction and hierarchical adsorption based on experimental data. Then, we discuss some numerical experiments realized thanks to the in-house software PumaFlowTM to validate the model and study the effect of multi-polymer injection(s) on adsorption. Finally, we conclude with the benefit provided by such type of modeling and we present the perspectives of this work.","PeriodicalId":178883,"journal":{"name":"Day 4 Thu, June 14, 2018","volume":"17 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Day 4 Thu, June 14, 2018","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2118/190759-MS","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
In a process of enhanced oil recovery (polymer flooding), of well treatment (conformance control, water shut-off) or eventually any other process, the injection of several types of polymer solutions can be envisioned. Polymers considered could have different chemical structure, may not have been dissolved in the same water and may not necessarily be injected in a single and unique well. The same question appears in connection with a method where a mixture of two (or more) polymers would be intentionally injected. The few studies available involve mixtures of polymers in organic solvents.
We could not find a study dedicated to an injection of a blend of polymers in porous media. Only a theoretical paper by V.P. Budtov [1] drew our attention, focusing on the estimation of the relative viscosity of a mixture of several polymers. Its main message is that, in order to make sense, the mixture is assumed as a single homogeneous phase, at least in a given area of concentration. The adsorption of several "polymer" components raises a difficult question about the so-called competitive adsorption.
There are two opposite answers. In the first one, at the laboratory scale, chemical interactions on the rock surface are instantaneous ("first come, first adsorbed"). According to the other one, at the reservoir scale, exchanges have all the time necessary to occur and they take place in the direction of a preferential adsorption of the stronger mass or higher affinity polymer ("hierarchical model"). In this paper, we present a complete modeling and simulation of multi-polymer injection(s), based on physical data. The concepts of mobility reduction and adsorption are studied and validated through some test cases. In particular, the effect of multi-polymer injection(s) on adsorption is investigated. In the first part, we introduce the mathematical system and the method used to solve it. The second part addresses the modeling of different parameters such as mobility and permeability reduction and hierarchical adsorption based on experimental data. Then, we discuss some numerical experiments realized thanks to the in-house software PumaFlowTM to validate the model and study the effect of multi-polymer injection(s) on adsorption. Finally, we conclude with the benefit provided by such type of modeling and we present the perspectives of this work.
在提高采收率(聚合物驱)、井处理(一致性控制、关水)或最终任何其他过程中,可以设想注入几种类型的聚合物溶液。所考虑的聚合物可能具有不同的化学结构,可能不溶于相同的水,也可能不一定注入到单口井中。同样的问题也出现在有意注入两种(或更多)聚合物的混合物的方法中。现有的少数研究涉及有机溶剂中聚合物的混合物。我们找不到专门研究在多孔介质中注射聚合物混合物的研究。只有vp . p . Budtov[1]的一篇理论论文引起了我们的注意,这篇论文关注的是几种聚合物混合物的相对粘度的估计。它的主要信息是,为了使其有意义,混合物被假设为单一的均相,至少在给定的浓度范围内是这样。几种“聚合物”组分的吸附提出了一个关于所谓竞争性吸附的难题。有两个相反的答案。在第一个实验中,在实验室尺度上,岩石表面的化学相互作用是瞬时的(“先到先吸附”)。根据另一种理论,在储层尺度上,交换有足够的时间发生,而且它们是在质量更强或亲和性更高的聚合物优先吸附的方向上发生的(“分层模型”)。在本文中,我们提出了一个完整的建模和模拟多聚合物注入(s),基于物理数据。研究了迁移率降低和吸附的概念,并通过一些测试案例进行了验证。特别地,研究了多聚合物注入剂对吸附的影响。在第一部分,我们介绍了数学系统和用于解决它的方法。第二部分是基于实验数据的迁移率、渗透率降低和分层吸附等不同参数的建模。然后,我们讨论了利用内部软件PumaFlowTM实现的一些数值实验来验证模型,并研究了多聚合物注入对吸附的影响。最后,我们总结了这种类型的建模所提供的好处,并提出了这项工作的观点。