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Numerical simulation method and device for oil-gas migration in tight reservoir

A technology for tight reservoirs and oil and gas migration, which is applied in the petroleum field and can solve problems such as the difficulty of effectively predicting migration paths.

Active Publication Date: 2015-09-02
王涛 +1
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Problems solved by technology

The movement pattern of oil and gas belongs to non-Darcy flow, which makes it very difficult to establish a reliable continuity equation based on the seepage theory model, and it is difficult to effectively predict the migration path due to the control of permeability heterogeneity

Method used

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  • Numerical simulation method and device for oil-gas migration in tight reservoir
  • Numerical simulation method and device for oil-gas migration in tight reservoir
  • Numerical simulation method and device for oil-gas migration in tight reservoir

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Embodiment Construction

[0058] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0059] From the perspective of energy balance, regardless of the flow pattern, oil and gas per unit volume of formation will intuitively select the surrounding formation space under the condition of unbalanced mechanical energy. )path of. When the power is less than the resistance, the oil and gas stop migrating and accumulate at this position. The corresponding oil wettability along the migration path (reservoir space) will be enhanced. After the formation of the early path, when the oil and gas per unit formation volume continue to migrate in the later period, two things need to be observed: ① follow the original principle of mechanical balance, which is equivalent to ...

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Abstract

The invention discloses a numerical simulation method and device for oil-gas migration in a tight reservoir and relates to the technical field of petroleum. Hydrocarbon source rock grids are equivalent to formicaries, artificial ants representing oil gas are released from multiple hydrocarbon source rocks according to the hydrocarbon-generating intensity, paths of the artificial ants and the shut-down grids, namely the grids in an enrichment region set, are recorded, and paths of all the artificial ants and the enrichment region set are acquired. Compared with a Darcy seepage manner simulation method, the method is simpler and more convenient, the effect more approaches practical conditions, the prediction precision is high, and meanwhile, quick calculation is realized due to simplicity of the method.

Description

technical field [0001] The invention relates to the field of petroleum technology, in particular to a numerical simulation method and device for oil and gas migration in tight reservoirs. Background technique [0002] As an effective replacement resource, tight oil has been successfully explored and developed around the world. This is another important breakthrough in the oil field since the tight sandstone gas reservoirs in the 1980s. [0003] The migration and accumulation of oil and gas is the key content of oil and gas exploration, which profoundly affects the methods and ideas of oil and gas exploration. As a dynamic process that occurred in geological history, it is impossible to directly observe oil and gas migration in tight reservoirs; due to the limitation of experimental technical conditions, large-scale, long-term experiments that can consider the influence of various factors are often impossible to realize. Therefore, mathematical simulation technology is beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G06N3/00
Inventor 王涛董少群
Owner 王涛
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