Method and device for determining profile control amount of water injection well

A determination method and technology of water injection wells, which are applied in earthwork drilling, wellbore/well components, production fluids, etc., can solve problems such as reduced planar sweep efficiency, reduced economic feasibility, and waste of plugging agents in blocked layers, and achieve improved Profile control effect, adjustment of water absorption profile, effect of avoiding waste

Inactive Publication Date: 2017-05-31
PETROCHINA CO LTD
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Problems solved by technology

At the same time, the effect of deep profile control is significantly affected by the amount of profile control. If the amount of plugging agent injected is too small, the effect of water plugging will not be achieved, and if

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  • Method and device for determining profile control amount of water injection well
  • Method and device for determining profile control amount of water injection well
  • Method and device for determining profile control amount of water injection well

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[0049]The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted", "connect...

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Abstract

The invention discloses a method and device for determining the profile control amount of a water injection well and relates to the field of petroleum reservoir exploitation. The method for determining the profile control amount of the water injection well comprises the following steps that the profile control thickness is determined according to water injection profile test data and well logging interpretation data; based on a distance between an oil extraction well and the water injection well, the basic profile control radius is obtained; according to tracer agent data and the basic profile control radius, profile control radius is obtained; a profile control area coefficient is determined according to the profile control direction situations of the oil extraction well and the water injection well; the profile control agent injection amount in the predetermined direction is obtained based on the profile control thickness, the profile control radius, the profile control area coefficient, the profile control direction number and the communication direction number; the total profile control agent injection amount is obtained according to the profile control agent injection amount in the predetermined direction. The method for determining the profile control amount of the water injection well can optimize profile control areas in all directions according to the situations of the oil extraction well and the water injection well, optimize effective injection pore volume and further determine the optimal profile control amount.

Description

technical field [0001] The invention relates to the field of oil reservoir development, in particular to a method and a device for determining the profile control amount of a water injection well. Background technique [0002] Water injection development is a relatively successful oil recovery method used in various countries in the world. It can increase the recovery rate of crude oil to 30%-50%, that is to say, there are still 50%-70% of crude oil due to different geological conditions and physical and chemical effects. , production factors and other effects still remain in the oil layer. The recovery of these remaining oils has been made possible by EOR technologies developed since the 1920s. Polymer flooding is one of the widely used tertiary oil recovery technologies, and it is also one of chemical flooding. Polymer flooding mainly increases the viscosity of water and the flow resistance of water in pores through the thickening effect of macromolecular polymer on wate...

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Application Information

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IPC IPC(8): E21B43/22E21B47/11
CPCE21B43/16E21B47/11
Inventor 邱晓娇武毅温静王奎斌唐海龙孙安培王楠张舒琴郭斐张新培李曼乔长发
Owner PETROCHINA CO LTD
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