Method for recognizing dominant flow channel based on zero dimension comparison plate

Abstract

The invention discloses a method for quantitatively recognizing an oil deposit dominant flow channel adopting a zero dimension comparison plate. The method includes the following steps: firstly collecting geological parameters and fluid parameters of an oil field to draw a parameter distribution cumulative frequency curve and obtain corresponding distribution intervals and distribution characteristics; according to the parameter distribution characteristics of a target oil deposit, calculating a water drive development dynamic through the combination with corresponding figure conceptual models; finding out the water absorption parameters and liquid production parameters of layers with the maximum and minimum water absorption capability and liquid production capability for zero dimension treatment through the statistics of conceptual model results; drawing a zero dimension parameter distribution plate, and dividing a dominant channel developing space through the cluster analysis method and obtaining a quantitative plate; and performing the single-well zero dimension parameter treatment, and judging the developing condition of the dominant flow channel through the zero dimension comparison plate. According to the invention, the analysis data source is wide, the cost is low, the spend time is short, personnel at an ore yard can use the method conveniently, the individual judgment on each injection and production well in the oil deposit is realized, the quantitative judging standard is given, and the specific developing layer of the dominant flow channel can be confirmed.

Description

technical field [0001] The invention belongs to the technical field of identifying dominant flow channels in oil reservoirs, and in particular relates to a method for identifying dominant flow channels based on a dimensionless comparison chart. Background technique [0002] At present, there are many methods for identifying the dominant flow channel of water injection, mainly as follows. ① Tracer method. The tracer concentration monitored by the method is used as an index, and the numerical simulation method is used to determine the dominant flow channel in the formation. Its advantage is high precision, but its disadvantages are high cost and heavy workload. ② Well testing method. Based on the existing well testing theory, measure the change law of the bottom hole pressure and explain whether there is a dominant flow channel. The theory of this method is strong, but it is affected by many factors in practical application, the measurement accuracy required for the parame...

AI Technical Summary

Problems solved by technology

This method has a wide range of data sources, but the interpretation process is affected by many factors, and the multi-solution is serious

[0003] The main disadvantages of the existing advantageous flow channel identification technology: ① high cost, heavy workload in the mine, long explanation time, and a lot of manpower and material resources

②Most methods cannot quantitatively identify the dominant flow channel, and are highly ambiguous

③ The basic data used by existing methods need special measurement, and there are few sources of data, which is not conducive to judgment

④ Existing methods are highly theoretical and weak in operability in actual mines, which is not conducive to popularization and use at the grassroots level

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