Mixed medium simulation method and apparatus for oil and gas flow in multiple mediums of tight reservoir

A technology of dense reservoirs and mixed media, applied in special data processing applications, instruments, electrical digital data processing, etc.

Active Publication Date: 2015-12-16
PETROCHINA CO LTD
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Problems solved by technology

[0008] The invention provides a mixed medium simulation method and device for oil and gas flow in multiple mediums of tight reservoirs to solve one or more deficiencies in the prior art

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  • Mixed medium simulation method and apparatus for oil and gas flow in multiple mediums of tight reservoir
  • Mixed medium simulation method and apparatus for oil and gas flow in multiple mediums of tight reservoir
  • Mixed medium simulation method and apparatus for oil and gas flow in multiple mediums of tight reservoir

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[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0043] Embodiments of the present invention provide a mixed medium simulation method and device for oil and gas flow in multiple media in tight reservoirs. The method first establishes a simulation area including multiple media, and then divides the simulation area into multiple grids. And make each grid simulate the medium of the same scale, and then establish the connection table according to the predetermined requirements, and finally calculate the flow dynamics of the grid through numerical simulation, and then calculate and obtain various data reflecting the tight...

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Abstract

The invention provides a mixed medium simulation method and apparatus for oil and gas flow in multiple mediums of a tight reservoir. The method comprises: obtaining a geological parameter and an oil and gas development engineering geometric parameter, establishing a simulated region with multiple mediums; according to the geological parameter and the oil and gas development engineering geometric parameter, dividing the simulated region into a plurality of unstructured grids, wherein each grid is used for simulating a medium; setting medium attribute parameter values of the unstructured grids according to medium types; performing sequential numbering on all the unstructured grids, and establishing a communication table between the grids according to a rule that a fluid arbitrarily flows between the adjacent unstructured grids; and calculating the conductivity between the adjacent grids; and dynamically performing numerical simulation calculation on flow among different unstructured grids according to the conductivity to predict dynamic change of tight oil and gas reserves in the mediums, contribution to oil and gas yield, well yield and formation pressure. The mixed medium simulation method and apparatus are not limited by multiplicity of the mediums and can predict tight oil and gas in the multiple mediums.

Description

technical field [0001] The invention relates to the field of oil and gas field development, in particular to a mixed medium simulation method and device for oil and gas flow in multiple mediums of tight reservoirs. Background technique [0002] As an unconventional resource, tight oil has a solid reserve base in my country and has great potential for development. Tight reservoirs have various media, and the scale ranges of different media are very large. The pore structure of the rock is complex, and pore-throat systems with different scales of "nano-micron-mm" are developed, and the physical properties of the reservoir are poor. At the same time, natural fractures of different scales such as "tens of centimeters to millimeters" macro-fractures and "millimeters to microns" micro-fractures were developed, combined with artificial fractures generated by volume fracturing to form a complex fracture network. The seepage mechanism is different at different times and in differen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 冉启全李冉徐梦雅李宁彭晖王志平袁江如
Owner PETROCHINA CO LTD
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