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Simulation method and device for oil and gas relay flow in multiple media in tight reservoirs

A technology of tight reservoirs and simulation methods, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc.

Active Publication Date: 2018-10-16
PETROCHINA CO LTD
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Problems solved by technology

[0008] The invention provides a method and device for simulating oil and gas relay flow in multiple mediums of tight reservoirs, so as to solve one or more deficiencies in the prior art

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  • Simulation method and device for oil and gas relay flow in multiple media in tight reservoirs
  • Simulation method and device for oil and gas relay flow in multiple media in tight reservoirs
  • Simulation method and device for oil and gas relay flow in multiple media in tight reservoirs

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Embodiment Construction

[0054] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

[0055] The embodiment of the present invention provides a method for simulating the relay flow of oil and gas in multiple media in a tight reservoir. The method includes first establishing a simulation area including multiple media, and then dividing the simulation area into multiple primary grids and secondary grids in turn. Then, based on the mechanism of relay discharge and supply, a connectivity table is established. Finally, the flow dynamics of the grids are obtained through numerical simulation, and then the flow dynamics of the tight oil and g...

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Abstract

The invention provides a method and device for simulating oil gas sequential flow in multiple media of a tight reservoir. The method includes the steps that a simulation area with the multiple media is built; according to geological parameters and oil and gas exploitation engineering geometrical parameters, the simulation area is divided into first-stage grids, the first-stage grids are divided into second-stage grids according to multiple numbers of the media in the first-stage grids, and each second-stage grid simulates one medium; medium attribute parameter values of the second-stage grids are set; according to a set fluid exchange rule, a connection table between the grids is built; the conductivity between the adjacent first-stage grids and the conductivity between the adjacent second-stage grids are calculated; flow dynamic between different first-stage grids and between different second-stage grids is subjected to value simulation calculation so as to predict dynamic change data of tight oil gas reserved in the media, contribution data of the media to the oil gas yield, the well yield and stratum pressure data. By means of the method and device, oil gas conditions in the media can be quickly predicted.

Description

technical field [0001] The invention relates to the field of oil and gas field development, in particular to a method and device for simulating oil and gas relay flow in tight reservoir multiple media. 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 different media. Ther...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 徐梦雅李宁彭晖冉启全王志平李冉
Owner PETROCHINA CO LTD
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