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Multi-scale finite-volume method for use in subsurface flow simulation

A finite-volume, multi-scale technology, applied in the fields of fluid extraction, design optimization/simulation, application-specific simulation process, etc., can solve problems such as error prior estimation

Inactive Publication Date: 2008-11-19
CHEVROU USA INC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when complex flow processes are studied using coarse models constructed via these simplified settings, an a priori estimate with the existing error is not possible

Method used

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  • Multi-scale finite-volume method for use in subsurface flow simulation
  • Multi-scale finite-volume method for use in subsurface flow simulation
  • Multi-scale finite-volume method for use in subsurface flow simulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] I. Mobility issues

[0033] A. Single-phase flow

[0034] Fluid flow in porous media can be described by an elliptic problem:

[0035] on Ω, ▿ · ( λ · ▿ p ) = f - - - ( 1 )

[0036] where p is the pressure, λ is the flow coefficient (permeability K divided by the fluid velocity μ) and Ω is the simulated subsurface volume or region. The source term f represents the well and, in the compressible case, the time derivative. Permeability heterogeneity is a major factor indicative of flow behavior in naturally porous bed rocks. The heterogeneity of permeability K is usually expressed as a complex multiscale function of space. Moreover, the permeability K tends to be a highly discontinuous full tensor. Solving for the space-dependent structure and capturing th...

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Abstract

The invention discloses a multi-scale finite-volume (MSFV) method to solve elliptic problems with a plurality of spatial scales arising from single or multi-phase flows in porous media. The method uses an orthogonal 2D grid (20) of a coarse grid unit (22). The bottom layer of fine grid (24) of a fine grid unit (26) comprises fine scale seepage rate information. The method efficiently captures the effects of small scales on the coarse grid, is conservative, and treats tensor seepage rate correctly. The underlying idea is to construct transmission rate that captures the local properties of a differential operator. The method leads to a multi-point discretization scheme for a finite-volume solution algorithm.

Description

[0001] related application [0002] This application is a co-pending US Patent Application Serial, entitled "Multi-Scale Finite-Volume Method for Use in Subsurface Flow Simulation," filed March 6, 2003 Serial No. 10 / 383,908, and common application entitled "Multi-Scale Finite-Volume Method for Use in Subsurface Flow Simulation," filed September 22, 2004 Continuation-in-Part of the pending application entitled "Multi-Scale Finite-Volume Method for Use in Subsurface Flow Simulation," filed March 6, 2003 Continuation of co-pending US Patent Application Serial No. 10 / 383,908. technical field [0003] The present invention relates generally to subsurface reservoir simulators, and more particularly to those simulators that simulate flow in subsurface reservoirs using multiscale physics. Background technique [0004] The level of detail available in reservoir descriptions often exceeds the computational capabilities of existing reservoir simulators. This resolution gap is usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10G01V11/00G06F17/50G06GG06G7/48
CPCE21B49/00E21B43/00G01V11/00G06F17/5018G06F2217/16G06F2111/10G06F30/23
Inventor 帕特里克·燕尼李松哈姆蒂·A·切莱皮
Owner CHEVROU USA INC
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