Characterization method and device for oil reservoir flow heterogeneity

Abstract

The invention discloses a characterization method and device for oil reservoir flowing heterogeneity, and belongs to the technical field of oil reservoir development. The method comprises the steps: acquiring the geological static information and fluid dynamic information of a target oil reservoir, performing numerical simulation to obtain the fluid flowing speed and porosity of fluid particles corresponding to a plurality of grids and the pore volume of each grid, acquiring the flight time corresponding to each grid between injection and production wells through a formula, and through the pore volume and the flight time, acquiring the flow capacity of each grid; determining the Lorentz coefficient according to the pore volume and the flow capacity of each grid, wherein the Lorentz coefficient is in positive correlation with the flow heterogeneity of the target oil reservoir. According to the method, when the oil reservoir flowing heterogeneity is analyzed through the obtained Lorentzcoefficient, the analysis result is accurate by means of the quantified residual oil heterogeneity numerical value, the well position can be adjusted in a targeted mode in time, and the recovery rateof the residual oil in the high water cut period is effectively increased.

Description

technical field [0001] The invention relates to the technical field of reservoir development, in particular to a method and device for characterizing reservoir flow heterogeneity. Background technique [0002] Petroleum is an important strategic resource of the country and an important lifeline for the development of the national economy. With the expansion of the field of oil and gas exploration, the efficient development of high water-cut reservoirs has become one of the main battlefields for enhancing oil recovery in major oilfields. [0003] When developing a reservoir in a high water-cut period, sometimes it is necessary to refer to the heterogeneity of the reservoir, and the flow heterogeneity of the reservoir is used to characterize the extent to which reservoir parameters vary with space. In related technologies, the flow heterogeneity of the reservoir is qualitatively analyzed by counting data such as oil saturation or flow rate of water production and injection we...

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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for characterization of reservoir flow heterogeneity, which can solve the problems in related technologies that the analysis results are not accurate enough, it is inconvenient to tap the potential of remaining oil in the high water-cut period, and it is not conducive to enhanced oil recovery

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