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What is the role of polyacrylamide in tertiary oil recovery?

  • Author:Hana Wang
  • Source:Original
  • Release on:2021-03-15
In oilfield production, polyacrylamide is used as a flocculant for drilling, and it is also used for tertiary oil recovery applications. Nowadays, crude oil production costs are gradually increasing. When a certain level is reached, tertiary oil recovery technology must be used to average the value. Drilling and The revival of the survey movement will also contribute to the increase in the amount of polyacrylamide. In the process of oilfield drilling, 3 million to 6 million low molecular weight polyacrylamide is used as a flocculant.

In the tertiary oil recovery method of elevated oilfields, polyacrylamide (PAM) plays an important role. Polyacrylamide can transform the rheology of irrigation, increase the viscosity of the driving fluid, improve the efficiency of water flooding, and reduce groundwater. It penetrates, and it is the flow of water and oil balance.

When polymer flooding is used, the surface active agent and auxiliary agent are mobilized in proportion and injected into the well, and the polymer liquid and water are injected. After injection, the water flow can flow forward and drive out the remaining crude oil in the oil well's cracks. It increases the oil recovery rate, which is called tertiary oil recovery.

The molecular weight of polyacrylamide used for tertiary oil recovery is 10%-50%, and the relative molecular quality is from hundreds of thousands to several million. my country's large oil fields have reached the middle and late stages of oil exploitation, and the water content of the oil has been extracted. It often increases. In order to stabilize the production of various oil fields in my country, tertiary oil recovery technology has been widely used to increase the oil recovery rate, and the use of the implementation of polyacrylamide flooding test has obtained a very good oil-increasing effect.