A nano-micron particle dispersion system improves water flooding well selection method

Abstract

The invention provides a method for improving water flooding and selecting a well through a nano-micron particle dispersion system, and belongs to the technical field of petroleum exploitation. According to the method for improving water flooding and selecting the well through the nano-micron particle dispersion system, after a geological static factor, an injection well dynamic factor and a production well dynamic factor are determined, a comprehensive decision factor of nano-micron particles improving water flooding of an evaluated object is obtained by calculating, and a standard value of a present block is obtained according to the comprehensive decision factor of the evaluated object in a target block; and a decision result of the nano-micron particle dispersion system for improving water flooding and selecting the well is determined according to the standard value of the target block. The nano-micron particle dispersion system is injected in an injection well which is higher than the block standard value to improve water flooding, and injection increase is conducted on an injection well which is lower than the block standard value, and no treatment is conducted on an injection well which is within the + / -10% range of the standard value of the target block. Compared with a PI decision method which is widely used in sites, the method for improving water flooding and selecting the well through the nano-micron particle dispersion system considers more factors and more comprehensively, and is more suitable for conducting water flooding improvement through the nano-micron particle dispersion system on low permeability oil reservoirs.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for improving water flooding well selection with a nano-micron particle dispersion system. Background technique [0002] In the late stage of oilfield water injection development, the water cut increases, the distribution of underground oil and water becomes more and more complex, and the interlayer and intralayer heterogeneity are serious, which leads to the breakthrough and channeling of injected water, and even premature water flooding of oil wells, which seriously affects the oilfield development effect. In view of the development of micro-fractures in low-permeability reservoirs in my country, from the perspective of the block as a whole, when multiple oil wells produce water at the same time, the water content of each well does not need to change the production measures. It is necessary to comprehensively calculate and analyze according to the geolog...

AI Technical Summary

Problems solved by technology

At present, two methods are usually used for design: one is to select the profile control well location through qualitative analysis based on field experience, and determine the amount of profile control agent. This method is simple, but there are uncertainties, single technical conditions, and too much subjectivity. Unable to achieve the purpose of optimization

The other is to simply use numerical simulation for optimal design. Using this method usually requires processes such as geological modeling, block history fitting, and scheme optimization, which is time-consuming and difficult to meet the urgent needs of on-site profile control design and construction.

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