Wetting agent and application thereof in binary compound flooding tertiary oil recovery

A wetting agent and ethylene glycol technology, applied in the field of oil production in oil fields, can solve the problems of not many and complex reservoir wettability, and achieve the effects of low production cost, improved oil recovery, and easy operation of process conditions.
CN101892040AActive Publication Date: 2010-11-24大庆高新区华龙祥化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
大庆高新区华龙祥化工有限公司
Publication Date
2010-11-24

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Abstract

The invention relates to a wetting agent and application thereof in binary compound flooding tertiary oil recovery. The wetting agent comprises the following components in percentage by mass: 13 to 33 percent of sulfonamido-betaine, 7 to 17 percent of alkyl amido-hydroxy-sulfonamido-betaine, 6 to 19 percent of sulfonic acid type imidazoline, 0.5 to 7 percent of fatty alcohol-polyoxyethylene ether, 0.5 to 3 percent of polyoxyethylene sorbitan monooleate, 0.3 to 1.7 percent of polyoxyethylene alkyl amine, 0.3 to 1.3 percent of fatty acid methyl ester ethoxylate, 1 to 7 percent of auxiliary emulsifying agent and the balance of water. The wetting agent prepared by the method transforms a lipophilic oil layer into a strong water-wetting oil layer in the process of the binary compound flooding and can greatly improve the reservoir recovery. When binary compound flooding oil recovery is performed, a reservoir is transformed from lipophilicity into hydrophily, and the ultimate recovery can beimproved by 10.47 percent.
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Description

Technical field:

[0001] The invention relates to a wetting agent in the field of oil recovery and its application in binary compound flooding for tertiary oil recovery. Background technique:

[0002] With the rapid development of the global economy, the demand for energy is increasing day by day, and the dependence on oil is becoming stronger and stronger. At present, most oilfields in China have entered into the late stage of high water cut. In the case that it is impossible to quickly discover new large-scale oilfields, improving the recovery of existing oilfield residues is an effective measure at present. The fundamental idea of ​​enhancing oil recovery comes from the formula: Pc=2σcosθ / γ. Under the condition of a certain capillary number γ, the interfacial tension σ and the wetting angle θ are reduced. These are two ways to achieve enhanced oil recovery.

[0003] Since the 1980s, many methods of enhancing oil recovery have appeared successively, such as alkaline water...

Claims

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