Method and device for obtaining permeability of argillaceous sandstone

A permeability and rock sample technology, applied in the direction of permeability/surface area analysis, measuring device, suspension and porous material analysis, etc., can solve problems such as inaccurate permeability and porosity reduction, improve calculation accuracy, overcome Effects that are difficult to estimate

Active Publication Date: 2016-03-02
PETROCHINA CO LTD
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Problems solved by technology

[0005] The formula in the KC model is derived based on pure sandstone, and argillaceous sandstone is different from pure sandstone. When argillaceous sandstone is formed, it will contain soil particles and other substances, which will reduce the porosity between rock particles, making The effective porosity of argillaceous sandstones will be completely different from that of pure sandstones, so for argillaceous sandstones, if you use the formula in the KC model to calculate permeability, the resulting permeability will be inaccurate

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  • Method and device for obtaining permeability of argillaceous sandstone
  • Method and device for obtaining permeability of argillaceous sandstone
  • Method and device for obtaining permeability of argillaceous sandstone

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Embodiment 1

[0044] The embodiment of the present invention provides a method for obtaining the permeability of argillaceous sandstone, such as figure 1 As shown, the processing flow of the method may include the following steps:

[0045] Step 101, obtaining the effective porosity, irreducible water saturation and median particle size of the target rock sample.

[0046] Step 102 , according to the effective porosity, irreducible water saturation and median particle size of the target rock sample and preset rock channel tortuosity parameters, the calculated value of the permeability of the target rock sample is obtained.

[0047] Step 103, according to the calculated value of the permeability of the target rock sample and the preset normalization parameter of the permeability of the rock sample, a standard value of the permeability of the target rock sample is obtained as the permeability of the target rock sample.

[0048] In the embodiment of the present invention, the effective porosity, ...

Embodiment 2

[0050] An embodiment of the present invention provides a method for obtaining the permeability of argillaceous sandstone, and the execution subject of the method may be a terminal. Wherein, the terminal may be a fixed terminal, such as a computer.

[0051] In this method, the terminal can pre-store the standardized parameters of the permeability of rock samples in different areas. Among them, the permeability of rock is an important parameter for logging evaluation of oil and gas reservoirs. The conduction performance of natural gas is good or bad. Standardization parameters can be set according to actual needs.

[0052] The terminal acquires and stores the standardized parameters of the permeability of rock samples in different regions can be varied, and an optional processing method is provided below, which may include the following steps:

[0053] Step 1: Obtain the median values ​​of effective porosity, irreducible water saturation and grain size of at least two rock sam...

Embodiment 3

[0081] Based on the same technical concept, the embodiment of the present invention also provides a device for obtaining the permeability of argillaceous sandstone, such as image 3 As shown, the device includes:

[0082] The first acquisition module 310 is used to acquire the effective porosity, irreducible water saturation and particle size median of the target rock sample;

[0083] The second obtaining module 320 is used to obtain the calculated value of the permeability of the target rock sample according to the effective porosity, irreducible water saturation, particle size median and preset rock channel tortuosity parameters of the target rock sample;

[0084] The third acquiring module 330 is configured to acquire a standard value of the permeability of the target rock sample as the permeability of the target rock sample according to the calculated value of the permeability of the target rock sample and the pre-stored normalized parameter of the permeability of the rock...

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Abstract

The invention discloses a method and device for obtaining the permeability of argillaceous sandstone and belongs to the technical field of oil field logging. The method comprises the steps that the effective porosity, irreducible water saturation and median grain diameter of a target sandstone sample are obtained; a calculation value of the permeability of the target sandstone sample is obtained according to the effective porosity, irreducible water saturation and median grain diameter of the target sandstone sample and preset sandstone pore cannel tortuosity parameters; a standard value of the permeability of the target sandstone sample is obtained according to the calculation value of the permeability of the target sandstone sample and prestored standardization parameters of the permeability of sandstone samples to serve as the permeability of the target sandstone sample. By means of the method and device for obtaining the permeability of argillaceous sandstone, the calculation precision of the permeability can be improved.

Description

technical field [0001] The invention relates to the technical field of oil field logging, in particular to a method and a device for obtaining the permeability of argillaceous sandstone. Background technique [0002] Permeability is an important parameter for logging evaluation of oil and gas reservoirs. In continental and marine oil and gas basins, the permeability of source rocks (argillaceous rocks, coal rocks) and other rocks reflects the level of oil or natural gas in oil and gas reservoirs. The quality of the transport performance and the accurate estimation of the permeability have laid the foundation for the prediction of the reservoir productivity of the oil and gas reservoir. [0003] Generally, the permeability can be calculated by the KC model proposed by Kozeny and Carman, and the formula of the KC model can be expressed as Among them, K is the permeability, φ e is the reservoir effective porosity calculated from well logging data, S is the specific surface v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 谢伟彪周凤鸣司兆伟徐风林发武张建林殷秋丽孔祥生田超国梁忠奎庄东志马明明田晓冬陈晶莹刘得芳马越蛟彭红立耿雪杰
Owner PETROCHINA CO LTD
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