Deep fluid diversion method

A liquid flow steering and deep-seated technology, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve problems that have not been reported, are difficult to control, and respond quickly, and achieve long-term effective plugging and expanded applications Good effect of range, clogging effect

Active Publication Date: 2012-11-28
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, it is generally believed that the inorganic precipitation reaction is an ionic reaction, the reaction speed is fast, and it is difficult to control. The depth of the inorganic precipitation plugging agent entering the formation is limited and it is not suitable for deep treatment. It is also very difficult to inject system formulations
Therefore, the reported inorganic precipitation plugging agents used in mines are mainly silicate precipitation plu

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  • Deep fluid diversion method

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[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0047] The present invention proposes a new type of deep flow diversion technology based on the thermodynamics and kinetics theory of inorganic reactions-inorganic precipitation deep flow diversion method. The method firstly identifies large pores (superior flow channels) in a comprehensive study of reservoir engineering. On the basis of ), determine the processing requirements of the strength, depth, and area of ​​the deep profile control; then design a reasonable water injection plan (injected water deployment plan, anti-scaling agent dosing plan and water injection process parameters) according to the processing requirements and formulate corresponding profile control Effect monitoring plan; finally, in the implementation of the plan, the design is constantly adjusted according to the monitoring situation to enhance the steering effect of deep profile control ...

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Abstract

The invention provides a deep fluid diversion method, which belongs to the field of petroleum extraction. By the method, a thermodynamics condition and a dynamic condition of a reaction are changed by adjusting the content of precipitated ions in injected water or/and adding an anti-scale agent with a certain concentration, so that the process of a precipitation reaction in stratum porous media can be effectively controlled, precipitates can be generated in a presumptive area on the deep part of a stratum, and the aim of deep profile control of fluid diversion can be fulfilled. By the method, the limitation that an inorganic precipitation plugging agent can only be used for profile control over water plugging in a near well is eliminated, and the application range of the inorganic precipitation plugging agent is expanded; the method has an important significance for improving water drive effects of high-water-cut reservoirs and particularly improving the water drive effects of high-temperature and high-salinity reservoirs, is suitable for various water injection reservoirs, and is easy to operate; and during operation implementation, a common water injection process can be kept unchanged by only adjusting ingredients of the injected water, and high efficiency and long-acting effects can be ensured at the same time.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a deep liquid flow diversion method, which is used for the liquid flow diversion in the deep part of inorganic precipitation. Background technique [0002] Water plugging and profile control of oil-water wells is one of the important technical means to control water, stabilize oil and improve water flooding in severely heterogeneous reservoirs. Its research and application began in my country in the late 1950s, and has been improving for decades. Waterflooding plays an important role in the development effect of various heterogeneous reservoirs. At present, my country's water flooding oilfields generally enter the high water-cut or ultra-high water-cut production period. Long-term water injection scours lead to the formation of large pores and channeling, and the injection water is seriously inefficient. Water or high-dose treatment technology can no lon...

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Application Information

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IPC IPC(8): E21B43/20E21B47/00E21B49/00
Inventor 贾红育王海波吕成远计秉玉
Owner CHINA PETROLEUM & CHEM CORP
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