Calculation method and device for capillary force and relative permeability curve

A technology of relative permeability and capillary force, which is applied in the field of calculation methods and devices for capillary force and relative permeability curves, can solve the problems of long time-consuming indoor cores, reduced research efficiency, and energy-consuming researchers, and achieves short time-consuming , the effect of high research efficiency

Active Publication Date: 2021-10-29
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0004] However, it takes a long time to conduct accurate experiments on indoor cores. For cores with different permeability, it may t

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  • Calculation method and device for capillary force and relative permeability curve
  • Calculation method and device for capillary force and relative permeability curve
  • Calculation method and device for capillary force and relative permeability curve

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[0085] Next, the technical scheme in the examples in this paper will be described in the following examples, and it is understood that the described embodiments are merely the embodiments of this Welcome, not all of the embodiments. Based on the embodiments herein, one of ordinary skill in the art does not have all other embodiments obtained under the pre-creative labor premise, it belongs to the scope of this paper.

[0086] The capillary force curve refers to a curve that changes the relationship between capillary force and the aqueous saturation of the core, relative to the permeability curve refers to the relative penetration rate of the oil phase and the aqueous saturation of the oil phase during the oil or water drift. Curve of change relationship, as well as a curve between the relative permeability of the aqueous phase and the aqueous saturation of the core.

[0087] Due to the multi-phase flow of the oil and gas reservoir core, the multiphase flow of water is an important...

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Abstract

The invention provides a method and a device for calculating a capillary force and relative permeability curve. The method comprises the following steps: determining a core pore network model of which the cross sections of pores and throats are quadrangular star-shaped; performing single-phase flow simulation calculation on the model, and determining the absolute permeability of the rock core; sequentially performing displacement simulation calculation of multiple displacement types on the model, and respectively determining a change relationship between capillary force corresponding to each displacement simulation calculation and core water saturation, a change relationship between oil phase effective permeability and core water saturation, and a change relationship between water phase effective permeability and core water saturation; combining each change relation corresponding to each displacement simulation calculation with the absolute permeability of the rock core, and determining the change relation between the relative permeability of the oil phase and the water saturation of the rock core and the change relation between the relative permeability of the water phase and the water saturation of the rock core corresponding to each displacement simulation calculation. According to the method, the efficiency of acquiring the capillary force and the relative permeability curve of the core can be improved.

Description

technical field [0001] The invention relates to the field of reservoir exploration, in particular to a calculation method and device for capillary force and relative permeability curves. Background technique [0002] The capillary force curve refers to the curve of the relationship between the capillary force and the water saturation of the core, and the relative permeability curve refers to the relationship between the relative permeability of the oil phase and the water saturation of the core during the oil-water or water-oil displacement process. The curve of the change relationship, and the curve of the change relationship between the relative permeability of the water phase and the water saturation of the core. [0003] Since the multiphase flow of oil, gas, and water in the reservoir core of oil and gas reservoirs is an important issue in the field of oil and gas field development, the flow characteristics of multiphase fluids are mainly characterized by capillary forc...

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14Y02A10/40
Inventor 王秀坤刘峻嵘唐维宇宫润东方立勤
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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