Method and device for determining permeability of reservoir

A method for determining the permeability, which is applied in the fields of permeability/surface area analysis, measuring device, earthwork drilling, etc. It can solve the problem of unreliable calculation results, and achieve the effect of good reliability and obvious practical application effect.

Active Publication Date: 2016-08-24
CHINA UNIV OF PETROLEUM (BEIJING)
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The SDR model mainly uses the geometric mean of the T2 spectrum to reflect the information of the entire T2 spectrum, wh

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  • Method and device for determining permeability of reservoir
  • Method and device for determining permeability of reservoir
  • Method and device for determining permeability of reservoir

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[0054] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following further describes the embodiments of the present invention in detail with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0055] In order to obtain accurate reservoir permeability, embodiments of the present invention provide a method for determining reservoir permeability. figure 1 It is a schematic diagram of a method for determining reservoir permeability in an embodiment of the present invention, such as figure 1 As shown, the method includes:

[0056] Step 101: Select a reservoir core sample, and determine the permeability and nuclear magnetic resonance echo train of the reservoir core sample;

[0057] Step 102. Invert the NMR echo train of the reservoir core sampl...

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Abstract

The invention discloses a method and device for determining the permeability of a reservoir. The method comprises the following steps of: selecting a rock-core sample of the reservoir and determining the permeability and a nuclear magnetic resonance echo string of the rock-core sample of the reservoir; carrying out inversion on the nuclear magnetic resonance echo string of the rock-core sample of the reservoir to obtain a nuclear magnetic resonance T2 spectrum of the rock-core sample of the reservoir and calculating characteristic parameters of the nuclear magnetic resonance T2 spectrum of the rock-core sample of the reservoir and porosity of the rock-core sample of the reservoir; establishing a multivariate statistical relation of the permeability of the rock-core sample of the reservoir with the characteristic parameters of the nuclear magnetic resonance T2 spectrum of the rock-core sample of the reservoir and the porosity of the rock-core sample of the reservoir; and according to the multivariate statistical relation, the characteristic parameters of the T2 spectrum of the reservoir and the porosity of the reservoir, determining the permeability of the reservoir. The method and device disclosed by the invention is simple, accurate and,reliabl and has obvious actual application effect and provides powerful technical support for oil reservoir classification, productivity prediction and reservoir modeling.

Description

technical field [0001] The invention relates to the technical field of well logging evaluation in oil and gas exploration, in particular to a method and a device for determining reservoir permeability. Background technique [0002] Permeability evaluation is of great significance for reservoir classification, productivity prediction and reservoir modeling. Reservoir permeability is mainly affected by factors such as porosity, irreducible water saturation and pore structure. At present, the regional empirical formula for calculating permeability is usually established by using the statistical relationship of parameters such as core analysis permeability and porosity. In conventional reservoirs with medium and high porosity and permeability, the pore structure is relatively simple, and this empirical formula can generally meet the accuracy requirements for reservoir permeability calculation. But this method is not suitable for the calculation of reservoir permeability with c...

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Application Information

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IPC IPC(8): G01N15/08G01V5/04E21B47/00
CPCE21B47/00G01N15/08G01N15/088G01V5/04
Inventor 谢然红刘秘段野
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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