Method, system and program storage device for reservoir simulation utilizing heavy oil solution gas drive

A reservoir model and reservoir technology, applied in the simulation process of specific applications, earthwork drilling, measurement, etc., can solve problems such as inaccurate consideration and underestimation of heavy oil production

Inactive Publication Date: 2009-02-11
CHEVROU USA INC
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Problems solved by technology

Traditional reservoir simulators cannot accurately account for this dissolved gas flooding when predicting fluid flow in the reservoir
This is a significant shortcoming of forecasts that often lead to underestimation of heavy oil production

Method used

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  • Method, system and program storage device for reservoir simulation utilizing heavy oil solution gas drive
  • Method, system and program storage device for reservoir simulation utilizing heavy oil solution gas drive
  • Method, system and program storage device for reservoir simulation utilizing heavy oil solution gas drive

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Embodiment Construction

[0033] I. Introduction

[0034] The present invention considers the effect of dissolved gas flooding of heavy oil, and more particularly the effect of fluid depletion rate on heavy oil production. Utilizing Relative Permeability k as a Function of Velocity or Depletion Velocity in Heavy Oil Reservoir Simulations rg values ​​to provide more accurate reservoir simulation predictions than those obtained with traditional reservoir simulations.

[0035] In a preferred embodiment, the oil velocity v is calculated for the reservoir unit o Relevant capillary number N c . These capillary numbers N c Used to adjust the baseline relative permeability correlation to account for velocity or depletion velocity versus relative permeability k rg Impact. In this preferred embodiment, first, preferably based on laboratory experiments, the value of the capillary number N is obtained ca Associated critical gas saturation S gc and / or endpoint relative permeability k rgro related relations...

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Abstract

A method a system and a program storage device for predicting a property of a fluid from a subterranean reservoir containing heavy oil entrained with gas. The method includes developing a baseline correlation between gas relative permeability k(rg) and gas saturation S(g), and capillary number N(c) calculated from a plurality of cells and at least one of critical gas saturation S(gc) and gas relative permeability k(rgro) based upon plurality of depletion rates. The baseline correlation is then adjusted to comport with at least one of S(gc) and k(rgro) to produce a plurality of corresponding adjusted baseline correlations where gas relative permeabilities k(rg) are selected. A reservoir simulation is then run utilizing the selected relative permeabilities k(rg) to predict a property of at least one fluid.

Description

technical field [0001] The present invention relates generally to methods and systems for reservoir modeling for predicting fluid flow in subterranean reservoirs, and more particularly, to improving reservoirs by taking into account the effects on fluid flow due to heavy oil solutiongas drive Performance predictions. Background technique [0002] Reservoir simulation is used to predict fluid flow in subterranean reservoirs. Fluid streams can include oil, gas, and water. Such reservoir predictions are important for reservoir management and for estimating the potential recovery of the reservoir. [0003] Reservoir modeling is well known in the petroleum industry and scientific literature. A good primer on the principles of reservoir simulation is Petroleum Reservior Simulation by K. Aziz and A. Settari, Elsevier Applied Science Publishers, London (1979). Additionally, a description of how reservoir modeling is generally performed is described in US Patent No. 6,052,520 to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06G7/48
CPCE21B47/10
Inventor M·库马尔F·加德勒A·萨尼
Owner CHEVROU USA INC
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