Oil production system and oil production method based on nano-magnetic fluid

Abstract

The invention relates to an oil production system and oil production method based on nano-magnetic fluid. The oil production system based on the nano-magnetic fluid comprises an injected water container, a magnetic fluid container, a displacing fluid container, a high-pressure pump unit and an electromagnet; water and the nano-magnetic fluid are mixed to be uniform in the displacing fluid container, an obtained mixture enters the high-pressure pump unit through a first displacing fluid delivery pipeline to be pressurized, and then the pressurized mixture enters a water injection well through a second displacing fluid delivery pipeline. According to the oil production system and oil production method based on the nano-magnetic fluid, the displacing front edge is monitored along with the displacing process, the oil displacing direction and speed are adjusted through the strong attraction force of a magnetic field on the displacing fluid in a low-wave and regional newly-drilled magnetic source well, remaining oil is effectively utilized, and the displacing efficiency is improved. Compared with a traditional new well drilling and injection-production pattern improving method, the oil production method has the advantages of being low in cost and high in controllability.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas engineering, and in particular relates to an oil recovery system and method that uses nano-magnetic fluid as a displacement fluid, thereby increasing the range of displacement and reducing production costs. Background technique [0002] Water injection technology is the basic technology in oilfield development, an important method of secondary oil recovery in oilfields, and a prerequisite for increasing and stabilizing oilfield production. Since the 1950s, domestic oil fields have formed a series of water injection techniques suitable for different reservoir geological conditions. [0003] As the development of old oilfields enters the later stage and special geological oilfields are put into development, many "advantageous channels" are washed out underground due to long-term water injection, as well as high permeability such as strong heterogeneity of reservoirs, complex distribution of ...

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Problems solved by technology

[0003] As the development of old oilfields enters the later stage and special geological oilfields are put into development, many "advantageous channels" are washed out underground due to long-term water injection, as well as high permeability such as strong heterogeneity of reservoirs, complex distribution of underground development, and poor regularity of fractures. Channels, so that the injection water has a small range, and most of the crude oil is directly produced from the production well without using oil, resulting in a reduction in displacement efficiency

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