Characterization method of relative permeability curve of oil phase based on harris model
A relative permeability and oil phase technology, applied in the field of oil phase relative permeability curve characterization based on Harris model, which can solve the problems of inability to characterize the nonlinear relationship of oil phase, inaccurate prediction of oil production, and poor accuracy.
Active Publication Date: 2020-07-14
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0003] The current method for characterizing the relative permeability of oil phase mainly uses the power function characterization method, which is simple in form but poor in accuracy
Especially in the range of low water saturation, it is impossible to characterize the complex nonlinear relationship between the relative permeability of oil phase and water saturation, which leads to the inability to accurately predict the oil production in the early stage of oilfield development, which affects the optimization of oilfield development plan and final production. Yield improvement
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[0036] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.
[0037] like figure 1 as shown, figure 1 It is a flowchart of the method for characterization of the relative permeability curve of the oil phase based on the Harris model of the present invention.
[0038] In step 101, typical oil-water relative permeability curve data that can reflect the physical characteristics of the block or reservoir are selected. In one embodiment, the typical oil-water relative permeability curve data (Table 1) of a block in Shengli Oilfield is selected, which can accurately reflect the oil-water two-phase comprehensive seepage characteristics of the block reservoir.
[0039] Table 1. Oil-water relative permeability data table of a certain block in Shengli Oilfield
[0040] Water saturation S w
Relative ...
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The invention provides an oil-phase relative permeability curve representing method based on a Harris model. The oil-phase relative permeability curve representing method comprises the following steps: selecting classic oil-water-phase relative permeability curve data capable of reflecting block or oil deposit physical characteristics; performing standard treatment on oil-phase relative permeability and water saturation, and judging a relationship between the standardized oil-phase relative permeability and water saturation; constructing a function expression of a relationship curve between oil-phase relative permeability and water saturation based on a Harris model; applying a least square method to dissolve and construct coefficients in the function expression of the relationship curve between oil-phase relative permeability and water saturation. The oil-phase relative permeability curve representing method based on the Harris model performs mathematical characterization on nonlinearrule of the oil-phase relative permeability and water saturation, lays foundation for deducing reservoir engineering, the water displacing oil theory and oil deposit value simulation calculating method, so that reservoir water drive development effects and trend are accurately predicated, and oil field development and production practice is guided.
Description
technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for characterization of oil phase relative permeability curves based on the Harris model. Background technique [0002] The relative permeability curve is a comprehensive reflection of the seepage characteristics of oil-water two-phase in rock voids, and is the most basic rule followed by the oil-water two-phase seepage process. The relative permeability curve of oil phase is an important data in oil production prediction of reservoir engineering. Effective characterization of relative permeability of oil phase has important guiding significance for optimizing oilfield development plan, increasing oil recovery rate and improving oilfield development effect. [0003] The current method for characterizing the relative permeability of oil phase mainly uses the power function characterization method, which is simple in form but poor in accuracy. Especially in ...
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IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 吴光焕刘西雷王玉环王可君陈明铭孙业恒孙钰杨鹏韦涛王传飞
Owner CHINA PETROLEUM & CHEM CORP