Oil reservoir numerical simulation grid design method

A technology of numerical simulation and design method, which is applied in the field of numerical simulation of reservoir engineering and can solve problems such as increase in calculation time, difficulty in solving flow equations, calculation convergence errors, etc.

Pending Publication Date: 2020-05-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, the calculation time increases significantly
And too small will make it difficult to solve the flow equation, causing calculation convergence and error problems

Method used

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  • Oil reservoir numerical simulation grid design method
  • Oil reservoir numerical simulation grid design method
  • Oil reservoir numerical simulation grid design method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0048] This example is an angular unconformity reservoir, and the development time is long, so the well area at the high part of the reservoir is selected as the research area to carry out the grid step design research.

[0049] ① Reservoir geological modeling and numerical simulation

[0050] On the basis of optimizing the selection of model areas, unconformity reservoir modeling technology is used to establish 3D geological body models with different grid scales, and numerical simulation research is carried out in combination with production dynamic data. In this embodiment, a total of 5 grid step models of 5m×5m, 10m×10m, 15m×15m, 20m×20m and 30m×30m were established.

[0051] ②Optimization of dynamic and static comprehensive evaluation parameters

[0052] According to the characteristics and data conditions of unconformable reservoirs, five evaluation parameters are optimized in this example: denudation line, reserve fitting rate, water cut fitting rate, remaining oil sat...

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Abstract

The invention provides an oil reservoir numerical simulation grid design method which comprises the following steps: step 1, carrying out optimization model region optimization, and formulating a region selection criterion; 2, establishing oil reservoir models with different grid step lengths, and carrying out numerical simulation research; 3, optimizing dynamic and static comprehensive evaluationparameters, and establishing a model grid step size evaluation parameter library; and step 4, based on the grid step size score and optimization of the oil reservoir type, establishing a score standard suitable for the oil reservoir type of the specific research area. According to the oil reservoir numerical simulation grid design method, the concept of a typical volume unit is used for reference; aiming at the problems that a large-step-length grid cannot accurately describe a small geologic body and spatial changes of the small geologic body, and the calculation time of the small-step-length grid greatly rises and converges, a dynamic and static comprehensive evaluation parameter system is established, and different grid step length models are comprehensively scored, so that quantitative optimization of grid step lengths is realized.

Description

technical field [0001] The invention relates to the technical field of numerical simulation of oil reservoir engineering, in particular to a grid design method for numerical simulation of oil reservoirs. Background technique [0002] Reservoir numerical simulation methods and technologies run through the entire process of oilfield discovery and development, and are key technologies for formulating reservoir development plans, optimizing development adjustment measures, and conducting research on remaining oil distribution. The step size design of reservoir numerical simulation network is an important part of this technology. Large-step grids cannot accurately describe small geological bodies and their spatial changes, and at the same time cause large errors in the simulation of injection-production dynamic response; small-step grids can accurately describe irregular reservoir boundaries, reservoir discontinuities, Fault trajectory, microstructure, pressure and saturation ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/05G06T17/20G06F111/10
CPCG06T17/05G06T17/20
Inventor 束青林苏朝光杨宏伟王锋魏国华张玉晓夏建胡心红
Owner CHINA PETROLEUM & CHEM CORP
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