Aerosol heavy oil shaking and dissolving device and viscosity reducing method

Abstract

The invention discloses an aerosol heavy oil shaking and dissolving device and a viscosity reducing method. Nitrogen is produced by ground equipment, and the nitrogen is pressurized by using nitrogencompression equipment and input into an air inlet pipe of the aerosol heavy oil shaking and dissolving device; meanwhile, a viscosity reducer is injected into a liquid inlet pipe of the aerosol heavyoil shaking and dissolving device by a pumper, the nitrogen and the viscosity reducer are mixed and atomized to form aerosol in the aerosol heavy oil shaking and dissolving device to be pumped into downhole; and after injection is completed, a well is shut in and soaked, and after the aerosol fully reacts with an oil reservoir, the well is opened for production. The aerosol heavy oil shaking and dissolving device is applied to the oil and gas field exploitation process, the nitrogen and chemical agents into the well are atomized to squeeze and inject into an oil layer of an oil well to ensurenormal production of the oil well through a ground aerosol generator.

Description

technical field [0001] The invention relates to the technical field of supporting tools for oil field development, in particular to an aerosol thick oil thixotropic device and a viscosity reducing method. Background technique [0002] Steam injection thermal recovery is currently the leading technology for the development of heavy oil fields. Due to the high environmental protection requirements in oil fields, steam boilers can only use gas fuel, which greatly increases the cost of thermal recovery; at the same time, the oil-gas ratio will gradually decrease during the development process. The phenomenon of water accumulation in the formation is becoming more and more serious, and the water content of the oil well is greatly increased, so that the economic benefits are getting worse and worse; secondly, the steam overburden phenomenon is serious, the production degree of the oil layer is low, and the recovery rate of the oil field is low; Sensitive formations are not suitabl...

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Problems solved by technology

[0011] At present, steam injection thermal recovery is the mainstream technology for heavy oil development. Under the current situation, the economic benefits of heavy oil thermal recovery are poor, and there are many problems: ①The oil reservoir is deeply buried, and the heat loss during steam injection is large, resulting in poor thermal recovery effect , low economic benefit; ②The reservoir is highly water-sensitive, and a large amount of steam injection leads to poor reservoir physical properties and a decrease in liquid supply capacity; ③After multiple rounds of huff and puff or long-term steam flooding, steam rushes along large pores, causing oil-gas ratio decline

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