Modeling and Simulating Multi-Polymer Injections
| Autor: | Christophe Preux, Iryna Malinouskaya, René Tabary, Quang-Long Nguyen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science chemistry Polymer flooding 0208 environmental biotechnology 02 engineering and technology Polymer Composite material 010502 geochemistry & geophysics 01 natural sciences 020801 environmental engineering 0105 earth and related environmental sciences |
| Zdroj: | Day 4 Thu, June 14, 2018. |
| DOI: | 10.2118/190759-ms |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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