Method and system for identifying water flow dominant channels of high-water-content oil field

Abstract

The embodiment of the invention provides a method and a system for identifying a water flow dominant channels of a high-water-content oil field. The method comprises the following steps of: acquiring parameters of between oil wells and water wells taking layer as a unit of the high-water-content oil field; performing statistical analysis on the parameters to obtain the proportion of the parameters in falling intervals; generating a model corresponding to the parameters according to the proportion of the parameters in the falling intervals; and identifying the water flow dominant channels among layers of the oil wells and the water wells according to the model corresponding to the parameters. A normal distribution model of each parameter is formed by acquiring the parameters related to thewater flow dominant channels; and an identification system for identifying the water flow dominant channels is formed by establishing an identification standard of the water flow dominant channels and applying the normal distribution model of each parameter so as to improve the water flooding development effect of the high-water-content oil field.

Description

technical field [0001] The present invention relates to the field of oilfield development, in particular to the field of high water-cut oilfield development, and specifically relates to a method and system for identifying water flow dominant channels in high-water-cut oilfields. Background technique [0002] For layered water-injection sandstone reservoirs, with the continuous deepening of oilfield development, when the development enters the late stage of high water-cut oilfields, due to the increasingly prominent contradictions between layers, planes, and layers in the oilfield, serious water injection ineffective circulation occurs. Stabilizing oil and controlling water in high water-cut oilfields has caused great difficulties, directly affecting the effect of water flooding development. [0003] The above-mentioned problems in water injection development in high water-cut oilfields can be effectively improved through deep water control and flooding, and the identificatio...

AI Technical Summary

Problems solved by technology

However, the traditional water absorption profile method, logging data method and fuzzy mathematics method can only analyze the water absorption profile data, wellhead pressure and fuzzy clustering model, and do not take into account the relevant parameters such as average water injection volume, cumulative flushing time and instantaneous water injection volume. At the same time, the traditional logging curve and water absorption profile data analysis method is simply to compare the data points with the model, and the accuracy of the water flow dominant channel identification is low, which is not suitable for wide application

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