High permeability band characterization method based on time varying

Abstract

The invention provides a high permeability band characterization method based on time varying. The method includes the steps that according to petroleum reservoir development dynamic and dynamic monitoring of high permeability band performance characteristics, high permeability bands in a mine field are recognized; screening and quantification of dynamic and static parameters for high permeability band characterization are performed; standardization and weight of the dynamic and static parameters are determined; the high permeability bands are comprehensively distinguished in a multi-index mode, summation is performed according to the product of standardized values and weight parameters of the dynamic and static parameters, and comprehensive discriminant values are obtained; the high permeability bands are classified, the development strength of the high permeability bands is recognized according to the mine field, and the comprehensive discriminant values are partitioned into intervals to serve as high permeability band classification standards. The high permeability band characterization method based on time varying can achieve quantitative characterization of the longitudinal and planar positions of the high permeability strip bands by synthesizing various influence factors of the high permeability strip bands, needed parameters can be obtained easily, the method is easy and convenient to operate, and reliable geological bases can be provided for strong heterogeneity governing of the reservoir type.

Description

technical field [0001] The invention relates to the fine research field of oil and gas field development reservoirs, in particular to a time-varying high-permeability strip characterization method. Background technique [0002] In the 1980s, Shengli Oilfield proposed the concept of "big pores", which is the hyperpermeable strip described in the present invention. Mainly in the sandstone with good physical properties and high permeability, due to the difference in permeability and the gravitational differentiation of oil and water, after long-term high-speed water injection development, the reservoir changes, the permeability increases, and the pore throat The radius increases, thus forming "big pores" in the middle and lower parts of the reservoir, that is to say, after long-term water injection or chemical agent scouring in medium and high permeability reservoirs, the rock mineral particles and intergranular cement in the reservoir will be eroded and denuded, making Pore-t...

AI Technical Summary

Problems solved by technology

The interwell dynamic connectivity inversion method is based on the idea of ​​signal and system analysis. The injection wells, production wells, and interwell channels of the reservoir are regarded as a complete system, and the dynamic interwell connectivity of the reservoir is inverted using production dynamic data. , this method can only qualitatively describe the presence or absence of hypertonic bands, but cannot accurately describe the development position and characteristic parameters of hypertonic bands

[0004] The above methods can only qualitatively or semi-quantitatively determine the existence of hyperpermeable bands at well points, but cannot quantitatively describe and predict the (planar and vertical) distribution characteristics of hyperpermeable bands between wells, and have not formed a set of highly operable hyperpermeable bands. Band Description Prediction Method

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