Method for analyzing multi phase and heat flow of fluids in reservoir and recording media therefor

Abstract

A method for analyzing multi phase and heat flow in a reservoir is disclosed.The method comprises a stage for specifying fracture surfaces in a reservoir as multiple three-dimensional coordinates, and specifying a three-dimensional coordinates of a intersecting line which intersects between the fracture surfaces to grasp connectivity between the fracture surfaces, a stage for generating a mathematical equation having main variables of pressure, saturation and temperature in the cell from at least two or more of fluids among oil, water, gas that are moving within the fracture network and each flow model of fluids with heat, and a stage for grasping the flow of fluids and heat within the fracture network in the reservoir by activating the flow model by specifying initial values of pressure, saturation and temperature in each cell, and specifying production condition or injection condition of a drilling well connected to the fracture network.

Description

TECHNICAL FIELD[0001]The present invention relates to both resources development technologies for development of resources such as oil, gas endowed in a reservoir and to environmental technologies such as CCS for storage of carbon dioxide in the ground, and more particularly to a method of grasping and estimating a flow of a multi phase fluid including heat in an underground reservoir in accordance with variable conditions.BACKGROUND ART[0002]The importance of developing unconventional gas such as shale gas, tight gas and coal bed methane has been increasing among oil development companies due to price rise of conventional resources such as oil and gas along with sharply increasing energy demands over a past decade. For example, shale gas is being actively produced in North American regions such as Barnett, Haynesville, Woodford and Engleford. It is foreseen that shale gas will replace a great portion in fossil fuel in the future, and therefore resource development companies, invest...

AI Technical Summary

Benefits of technology

The present invention is about using a discrete fracture network model to predict the flow of fluids in shale gas reservoirs. This approach takes into account oil, water, gas, and heat as fluids move through fractures. The main advantage of this invention is that it adds heat flow to an existing model, which is important for predicting the flow of multi-phase fluids in shale gas reservoirs. Previous models have not fully accounted for heat and temperature, which can impact fluid flow and well performance. By using a discrete fracture network model, researchers hope to better understand and predict the behavior of shale gas in reservoirs.

Problems solved by technology

That is, the existing analysis methods are designed to simulate movement of fluids on the basic premise of fluids moving through pores in the reservoir, and therefore there has been a limitation that existing analysis methods are not adapted to the flow model for fluids, such as shale gas, moving through the fractures.

Further, there is another limitation that the part of heat flow is missed from some programs that have developed for modeling the flow of unconventional resources such as shale gas.

However, many limitations have been exposed in reflecting real phenomenon with the programs modeled the flow of shale gas due to lack of heat flow consideration.

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