Method and system for identifying high-water-consumption layer zone

Abstract

The invention discloses a method and system for identifying a high-water-consumption zone. The identification method comprises the following steps: identifying a high-water-consumption well point by amulti-parameter fuzzy evaluation method; qualitatively and quantitatively analyzing and identifying a high-water-consumption layer section by using multiple data; and determining the distribution ofthe high-water-consumption zone by combining seepage resistance analysis. By adopting the scheme, a set of three-position zoning method from point to surface to body is established, points representedby well points, surfaces represented by layer sections and bodies represented by layer zones are organically associated, and the purposes of saving an extra-high water content later-period integral oilfield, accurately identifying and governing a high-water-consumption zone, improving the recovery ratio and prolonging the economic life of the extra-high water content oilfield are achieved. Therefore, the method has very high market application value.

Description

technical field [0001] The invention relates to the identification of the development of high water-consumption zones in ultra-high water-cut oilfields, and in particular to a method and system for identifying high-water-consumption zones. Background technique [0002] Affected by reservoir heterogeneity and long-term water injection development, high water consumption zones develop in ultra-high water-cut oilfields, and water injection is inefficient and ineffective, which is not conducive to improving recovery and greatly increases operating costs. Therefore, in the late stage of ultra-high water cut oilfields, accurate identification and treatment of high water consumption zones have become an important direction for water flooding to develop reservoirs, improve recovery, and extend economic life. [0003] Specifically, oilfield development enters the late stage of ultra-high water cut. Affected by the heterogeneity of the reservoir, the injected water rushes along the hi...

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Problems solved by technology

[0005]However, most oilfields at home and abroad are still researching on water flooding reservoirs in the areas of low-efficiency and ineffective circulation zones, dominant seepage channels, and high-permeability strips. , too much emphasis on the influence of a single factor such as the absolute permeability of the reservoir on the oilfield development effect, or the use of a reservoir numerical simulator to establish a reservoir numerical simulation model to adjust the development strategy

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