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Apparatus, method and system for improved reservoir simulation using an algebraic cascading class linear solver

A technology for simulating devices and reservoir models, applied in measurement devices, instruments, scientific instruments, etc., and can solve problems such as backwardness

Inactive Publication Date: 2013-07-24
CHEVROU USA INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These requirements pose great challenges, especially for the widely varying unstructured grid problems and existing methods, including incomplete upper-lower (ILU) factorization and nested factorization, which are not compatible with satisfying All these basic requirements are still a long way behind

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  • Apparatus, method and system for improved reservoir simulation using an algebraic cascading class linear solver
  • Apparatus, method and system for improved reservoir simulation using an algebraic cascading class linear solver
  • Apparatus, method and system for improved reservoir simulation using an algebraic cascading class linear solver

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Embodiment Construction

[0034] Hereinafter, preferred embodiments and other embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that other embodiments and changes can be made without departing from the scope of the present invention, as will be readily apparent to those skilled in the art.

[0035] Figure Ia illustrates a representation of a reservoir 10 having a portion 12 shown in the exploded (two-dimensional) view of Figure Ib. The reservoir 10 (below the water table) typically contains a fluid 20, such as oil, gas, water, or both of those substances that fill the pore space between the porous media 22 (e.g., sandstone or limestone) forming the reservoir rocks. or a mixture of all three.

[0036] Figure 2 shows a flow diagram of a preferred embodiment of the present invention. After the start step 100, the first step is to mesh 110 the region of interest into cells, each cell having a node at its center. Represent...

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Abstract

A method, system, a program storage device and apparatus are disclosed for conducting a reservoir simulation, using a reservoir model of a region of interest, wherein the region of interest has been gridded into cells. Each cell has one or more unknown variable. Each cell has a node. A graph of the nodes is represented by a sparse matrix. The graph is an initially decomposed into a pre-specified number of domains, such that each cell exists in at least one domain. The cells and domains are numbered. Each cell has a key, the key of each cell is the set of domain numbers to which the cell belongs. Each cell has a class, the class of each cell being the number of elements in the cell. The cells are grouped into connectors, each connector being the set of cells that share the same key. Each connector having a connector class, the connector class being the number of elements in the key of the connector. Each connector having only one higher-order neighbor connector is merged with such higher-order neighbor connector. The class of all locally maximum class connectors is reset to the maximum class of held by any connector. The maximum class connector is forced to contain only one cell. The connectors are ordered in increasing order of class. Interpolation operator and restriction operator are constructed from the ordered connectors. The interpolation operator and restriction operator are used to construct a coarse grid. The coarse grid may be used to determine the unknown variables of the cells.

Description

[0001] related application [0002] This application claims priority to US Provisional Patent Application 60 / 690,319, filed June 14, 2005. technical field [0003] The present invention relates to devices, methods and systems for reservoir simulation. In particular, the present invention provides devices, methods and systems for more effectively and efficiently simulating fluid flow in a reservoir utilizing an algebraic series-level linear solver. Background technique [0004] Reservoir simulations often require the numerical solution of the physical equations that describe the complex behavior governing the flow of multicomponent, multiphase fluids in naturally porous media in reservoirs. The governing equations typically used to describe the fluid flow are based on thermodynamic equilibrium and the principles of conservation of mass, momentum and energy, as described in Aziz and Settari, 1977 . The complexity of the physics governing reservoir fluid flow leads to systems...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCG01V2210/663E21B49/00G01V99/005
Inventor H·A·切列皮J·沃利斯
Owner CHEVROU USA INC
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