Total shale gas reservoir organic porosity degree computing method and device

A technology of organic porosity and calculation method, applied in the fields of mining exploration and development, geology, and shale gas, it can solve the problem that there is no standard calculation formula, the organic porosity of shale gas reservoirs cannot be detected and obtained, and the formulation of shale gas development plans is difficult. Large and other problems to achieve the effect of reducing the difficulty of formulation

Inactive Publication Date: 2015-07-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0005] The present invention provides a method and device for calculating the total organic porosity of shale gas reservoirs, which solves the problem that the organic porosity of shale gas reservoirs in the prior art cannot be detected and obtained, and there is no standard calculation formula. Technical issues that are difficult to formulate development plans

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  • Total shale gas reservoir organic porosity degree computing method and device
  • Total shale gas reservoir organic porosity degree computing method and device
  • Total shale gas reservoir organic porosity degree computing method and device

Examples

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Embodiment 1

[0039] In this example, a calculation method for the total organic porosity of shale gas reservoirs is provided, please refer to figure 1 , figure 1 It is a flow chart of the calculation method of the total organic porosity of shale gas reservoirs in the embodiment of the present application, which includes:

[0040] Step S101, obtaining the organic porosity K of the shale gas reservoir;

[0041] Step S102, obtaining the conversion coefficient C of converting organic carbon into organic matter in the shale gas reservoir, the organic carbon content TOC of the shale gas reservoir, and the density ρ of the shale gas reservoir r and the organic matter density ρ in the shale gas reservoir o ;

[0042] Step S103, calculate ρ r divided by ρ o The ratio of C and TOC is multiplied by the ratio to obtain the total organic matter volume ratio N b ;

[0043] Step S104, calculate N b and K to obtain the total organic porosity

[0044] The calculation principle and calculation st...

Embodiment 2

[0084] In this embodiment, a calculation device for the total organic porosity of shale gas reservoirs is provided, please refer to figure 2 , figure 2 It is a structural diagram of the device, and the device includes:

[0085] The first acquisition unit 201 is configured to acquire the organic porosity K of the shale gas reservoir;

[0086] The second acquisition unit 202 is configured to acquire the conversion coefficient C of converting organic carbon into organic matter in the shale gas reservoir, the organic carbon content TOC of the shale gas reservoir, and the density ρ of the shale gas reservoir r and the organic matter density ρ in the shale gas reservoir o ;

[0087] Total organic matter volume ratio calculation unit 203, used to calculate ρ r divided by ρ o The ratio of C and TOC is multiplied by the ratio to obtain the total organic matter volume ratio N b ;

[0088] Total organic porosity calculation unit 204, used to calculate N b and K to obtain the to...

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Abstract

The invention discloses a total shale gas reservoir organic porosity degree computing method and device. The method includes the steps that the organic porosity K of a shale gas reservoir is obtained; the conversion coefficient C for the organic carbon in the shale gas reservoir to be converted into organic matter, the organic carbon content TOC of the shale gas reservoir, the rock density phi r of the shale gas reservoir and the organic matter density phi o of the shale gas reservoir are obtained; the specific value obtained by dividing the phi r by the phi o, and then the product of the C and the TOC is multiplied by the specific value to obtain the total organic matter volume rate Nb; the product of the Nb and the K is worked out to obtain the total organic porosity degree Rho. According to the method, through the relation deduction of the mass, volume, density and organic matter content, the method aims to solve the problems that in the prior art, the total organic porosity degree of the shale gas reservoir cannot be obtained through detection, and no standard computing formula exists, and the method and device can have significant application value on the aspects of the total shale gas reservoir organic porosity degree computing and shale gas reserves evaluation.

Description

technical field [0001] The invention relates to the technical fields of shale gas, geology, and mining exploration and development, in particular to a method and device for calculating the total organic porosity of shale gas reservoirs. Background technique [0002] The total organic porosity of shale gas reservoirs refers to the ratio of the total organic pore volume in shale gas reservoirs to the volume of shale gas reservoirs, which can be expressed as a percentage. Organic pores or organic pores in shale gas reservoirs are pores formed during the thermal evolution of organic matter in shale during hydrocarbon generation and expulsion. Organic pores are the most widespread and important type of pores in shale, and are developed in shale gas In the organic matter of the shale layer, there are mostly nanoscale pores, which are the main pore space for shale gas storage. In the process of shale gas exploration and development, the organic porosity of shale gas reservoirs is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 何生何陈诚彭女佳杨锐
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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