Fractured reservoir CO2 drive flow simulation method using neural network technology

Abstract

The invention relates to a fractured reservoir CO2 oil displacement flow simulation method, in particular to a fractured reservoir CO2 oil displacement flow simulation method utilizing a neural network technology. The method comprises the following steps that a target oil reservoir is surveyed, oil reservoir geological parameters and fracture geometric parameters are collected, and a fractured oil reservoir geometric model is established; establishing a flash calculation model based on a neural network; establishing an embedded discrete crack model to describe the crack; establishing a component model to describe the CO2 oil displacement process; and combining the flash calculation model based on the neural network model with the component model, considering an embedded discrete fracture model, establishing a fractured reservoir CO2 oil displacement flow model, and performing numerical solution. According to the method, flash evaporation calculation can be rapidly and stably carried out by utilizing the advantages of the neural network, the convergence speed of calculation is improved, and meanwhile, the influence of cracks on CO2 oil displacement is accurately described.

Description

technical field [0001] The invention relates to a fractured oil reservoir CO 2 Oil displacement flow simulation method, especially related to a fractured reservoir CO2 using neural network technology 2 flooding simulation method. Background technique [0002] my country is rich in low-permeability and tight oil reservoirs, which have become the main growth point of reserves. However, the reservoir properties of this type of oil and gas reservoirs are poor. Affected by deep burial, small well control range, and low abundance, conventional water flooding development is difficult to produce, with no natural productivity or low production; the produced reserves have low single-well capacity and low recovery, and it is urgent to find new ways to enhance recovery method. [0003] Note CO 2 Oil flooding technology is an ideal method. Field gas injection experiments show that the gas injection capacity is more than 5 times that of water, which can quickly replenish the energy ...

AI Technical Summary

Problems solved by technology

However, for the oilfield-level model, the discrete fracture model still has the problem of complex meshing and large amount of calculation

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