| Título: | The Research on Weak Alkali ASP Compound Flooding System for Shengli Heavy Oil |
| Autores: |
Ting, CHEN; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao Guicai, ZHANG; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao Jijiang, GE; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao Hong, YANG; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao |
| Fecha: | 2013-03-31 |
| Publicador: | Advances in Petroleum Exploration and Development |
| Fuente: |
 |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
| Tema: |
Weak alkali; Sodium metaborate; Compound flooding system; Nonylphenol polyoxyethlene polyoxypropylene ether sulfate; Heavy oil |
| Descripción: | In order to avoid the disadvantages caused by strong alkali used in enhanced oil recovery, sodium metaborate was compounded with nonionic surfactant nonylphenol polyoxyethlene polyoxypropylene ether sulfate and hydrolyzed polyacrylamide for the first time as a chemical displacement agent for Shengli heavy oil. The interfacial tension between crude oil and aqueous solutions, emulsification tests, microscopic displacement properties and sandpack flooding were investigated. It can be observed that the interfacial tension was reduced to ultra-low value due to the synergy effect between the weak alkali and surfactant. The microscopic displacement tests showed that there was an optimum surfactant concentration for alkali-surfactant flooding system to obtain larger sweep efficiency. And the recovery efficiency can be further increased by addition of hydrolyzed polyacrylamide. The oil recovery increased with the increasing of hydrolyzed polyacrylamide concentration. The newly designed compound system was proven to have the application potential on pilot tests.Key words: Weak alkali; Sodium metaborate; Compound flooding system; Nonylphenol polyoxyethlene polyoxypropylene ether sulfate; Heavy oil |
| Idioma: | Inglés |
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