Abstract
The paper overviews the research and application of silicate plugging agent, according to the different mechanisms and application forms, the plugging agent is divided into silicate gel, silicate precipitation, silicate/polymer, silicate/surfactant, silicate gel/foam and so on. This paper chiefly introduces the conception, mechanism and development tendency of the different systems mentioned above. The development tendency manifests as fully utilize personal properties and cooperate with other plugging agents or technologies, including the study of reaction mechanism, combination of plugging agent, grasping water flood timing, developing deep profile control and water shutoff technology, combining with other measures (chemicals huff and puff), in order to play the role of such blocking agents, further enhance oil recovery.
Highlights
Most oil fields in China have entered the late stage of development, and profile control and water plugging has become an important technical measure in domestic and international high water-content oilfield to improve water flooding effect
The paper overviews the research and application of silicate plugging agent, according to the different mechanisms and application forms, the plugging agent is divided into silicate gel, silicate precipitation, silicate/polymer, silicate/surfactant, silicate gel/foam and so on
This paper introduces the conception, mechanism and development tendency of the different systems mentioned above
Summary
Most oil fields in China have entered the late stage of development, and profile control and water plugging has become an important technical measure in domestic and international high water-content oilfield to improve water flooding effect. Research of temperature-resistance and salt-tolerance plugging agent becomes more and more important. Silicate plugging agent has temperature-sensitive, salt-sensitive, Ca-Mg sensitive, and so on, so we can make full use of reservoir physical and chemical characteristics to profile control. More and more the plugging agent based on silicate is applied in high-temperature and high-salinity reservoirs. Profile control is a problem in high-temperature and high-salinity reservoirs [6], and silicate plugging agent was extensively applied in water plugging, profile control, inhibition gas coning, stability of reservoir rock and clay [7]-[12]. This paper summarized the application of silicate plugging agent in the oilfields
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