Method for oil prediction in fractured reservoirs and recorded medium therefor
AssigneeIndustry-University Cooperation Foundation Hanyang University
InventorWon-Mo Sung
Life of this patent
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Abstract
The present invention relates to a method of predicting an amount of production from a fractured reservoir and a recorded medium for the method. The method of predicting an amount of production from a fractured reservoir can include: (a) generating a fracture network model, which includes discrete fractures, using fracture characteristic information; (b) generating a flow model for representing flow paths for a fluid between the discrete fractures using a 2-dimensional finite difference method; and (c) predicting the amount of production from the fractured reservoir using the flow model.
Claims10
A method of predicting an amount of production from a fractured reservoir performed by a computer for predicting the amount of production from the fractured reservoir, the computer including a memory containing instructions adapted to cause the computer to operate as a fracture network model generating unit, a fracture network flow model generating unit and a production predicting unit, the method comprising:
- (a) generating, by the computer, a fracture network model using fracture characteristic information, by the fracture network model generating unit, the fracture network model including discrete fractures;
- (b) generating, by the computer, a flow model for representing flow paths for a fluid between the discrete fractures using a 2-dimensional finite difference method by the fracture network flow model generating unit;
- and
- (c) predicting, by the computer, the amount of production from the fractured reservoir using the flow model by the production predicting unit,
- wherein the generating of the flow model comprises, (b1) identifying intersecting discrete fractures intersecting each other from among the discrete fractures;
- (b2) transforming the intersecting discrete fractures into 2-dimensional finite difference method grid squares;
- and (b3) obtaining intersection block information relating to interconnected grid squares, and
- wherein the transforming comprises, computing an optimal number of grid squares for each of the intersecting discrete fractures in consideration of an average size of the intersecting discrete fractures;
- and determining a size of a grid square by using the computed optimal number of grid squares.
A computer-readable non-transitory storage media readable by a digital processing device, tangibly embodying a program of instructions executable by the digital processing device to perform a method for predicting an amount of production from a fractured reservoir, the method comprising:
- (a) generating a fracture network using fracture characteristic information, the fracture network model including discrete fractures;
- (b) generating a flow model for representing flow paths for a fluid between the discrete fractures using a 2-dimensional finite difference method;
- and
- (c) predicting the amount of production from the fractured reservoir using the flow model,
- wherein the generating of the flow model comprises, identifying intersecting discrete fractures intersecting each other from among the discrete fractures;
- transforming the intersecting discrete fractures into 2-dimensional finite difference method grid squares;
- and obtaining intersection block information relating to interconnected grid squares, and
- wherein the transforming comprises, computing an optimal number of grid squares for each of the intersecting discrete fractures in consideration of an average size of the intersecting discrete fractures;
- and determining a size of a grid square by using the computed optimal number of grid squares.
A method of predicting an amount of production from a fractured reservoir, performed by a computer for predicting the amount of production from the fractured reservoir, the computer including a memory containing instructions adapted to cause the computer to operate as a fracture network flow model generating unit, the method comprising:
- identifying, by the computer, intersecting discrete fractures intersecting each other from among discrete fractures included in a fracture network by the fracture network flow model generating unit;
- transforming, by the computer, the intersecting discrete fractures into 2-dimensional finite difference method grid squares by the fracture network flow model generating unit;
- and
- obtaining, by the computer, intersection block information relating to interconnected grid squares by the fracture network flow model generating unit,
- wherein a flow direction between the interconnected grid squares is determined by using the obtained intersection block information, and the amount of production from the fractured reservoir is predicted based on the determined flow direction, and
- wherein the transforming comprises, computing an optimal number of grid squares for each of the intersecting discrete fractures in consideration of an average size of the intersecting discrete fractures;
- and determining a size of a grid square by using the computed optimal number of grid squares.
Dependencies are inferred from the claim text.