The compatibility evaluation of Cr3+ Gel system and polymer/surfactant system with alternating injection mode

2016 International Conference on New Energy and Future Energy System

Zhang, J.H.^1 ; Li, H.K.^1 ; Wang, Y.N.^1 ; Zhi, J.Q.^1 ; Liu, Y.^2

Key Laboratory for Enhancing Oil/Gas Recovery, Ministry of Education, Northeast Petroleum University, Daqing, Heilongjiang

163318, China^1

Drilling and Production Technology Research Institute Petrochina Qinghai Oilfield Company, Dunhuang, Gansu

736202, China^2

关键词: Alternating injection;    Compatibility evaluations;    Compound system;    Enhance oil recoveries;    Enhanced oil recovery;    Experimental analysis;    Polymer flooding;    Ultralow interfacial tension;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/40/1/012019/pdf
DOI  :  10.1088/1755-1315/40/1/012019

来源: IOP

【 摘 要 】

Alternately injecting the slug of the gel and polymer/surfactant compound system is a new way to further enhance oil recovery after polymer flooding. The displacement system needs to produce an ultra low interfacial tension to oil and to enlarge swept volume significantly. Based on experimental analysis, the influence factors of Cr3+gel system viscosity and the compatibility of gel with two types of surfactant compared with composite ion gel system has been studied. The experimental result shows that it has well stability, and the compatibility of gel with RMA-1 type surfactant is very well. It can produce an ultra low interfacial tension to oil so that enhanced oil recovery has been reached more than 10 percent by using the gel system to displace residual oil after polymer flooding in artificial large flat- panel model.