A Method for Calculating Reservoir Permeability Based on Seismic Section Quality Factor

A technology of seismic profile and quality factor, which is used in permeability/surface area analysis, seismology for logging records, seismic signal processing, etc. high effect

Active Publication Date: 2019-07-02
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention can establish multiple models at the same time, and overcomes the inaccurate and large error problems existing in the existing method of directly and simply converting the porosity calculated from the seismic section into the permeability

Method used

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  • A Method for Calculating Reservoir Permeability Based on Seismic Section Quality Factor
  • A Method for Calculating Reservoir Permeability Based on Seismic Section Quality Factor

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Embodiment 1

[0031] A method for calculating reservoir permeability based on seismic profile quality factors, comprising: establishing one or more mathematical relationships between drilled permeability parameters and seismic profile quality factors; applying the mathematical relationships to seismic wave data at places without drilling According to the similarity between the seismic wave data at the place without drilling and the seismic wave data used to establish the mathematical relationship, the reservoir type is determined, and the permeability at this place is calculated by selecting the corresponding mathematical relationship according to the reservoir type.

[0032] Described method specifically comprises the steps:

[0033] (1) Collect the core permeability parameters of the specified reservoir section that has been drilled in the area or geological structure, and calculate the average value;

[0034] (2) Using seismic data to extract quality factor Q data volume;

[0035] (3) D...

Embodiment 2

[0049] The present invention utilizes that there is such a correlation between the Q factor and the permeability, and because the types of reservoir pores or fractures are different, in the same oil and gas area, the relationship between the permeability and the Q factor will also be different, therefore, according to the actual situation, establish Different models, in the prediction, first determine the reservoir type according to certain rules, and then select the corresponding model to predict the permeability.

[0050] The present invention will be further described below in conjunction with the accompanying drawings. figure 1 Among them, the horizontal axis—average Q factor (dimensionless); the vertical axis—permeability (millidarcy).

[0051] Described method specifically comprises the steps:

[0052] (1) Collect the core permeability parameters of the specified reservoir section that has been drilled in the area or geological structure, and calculate the average value...

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Abstract

The invention discloses a method for calculating reservoir permeability based on a seismic profile quality factor. The method comprises the steps of establishing one or a plurality of mathematical relations between permeability parameters of drilled wells and a seismic profile quality factor in a classified manner; applying the mathematical relation on the seismic wave data without the drilled well, determining the type of the reservoir according to similarity between the seismic wave data without the drilled well and the seismic wave data used for establishing the mathematical relation, and selecting the corresponding mathematical relation through the reservoir type for calculating the permeability at a certain position. According to the method of the invention, a plurality of models canbe simultaneously established, thereby overcoming problems of low accuracy and large error in an existing method in which the porosity calculated according to the seismic profile is directly and simply converted to permeability.

Description

technical field [0001] The invention relates to a method for calculating reservoir permeability based on seismic profile quality factors, and belongs to the field of seismic profile reservoir prediction for oil and gas field exploration and development. Background technique [0002] Reservoir permeability is one of the most important parameters to determine the effect of oil and gas development. Around this topic, predecessors have carried out a lot of theoretical and experimental research on the calculation of permeability. In the aspect of using seismic section to predict reservoir permeability, in the past, the permeability and porosity obtained by core analysis were basically used to establish the porosity-permeability relationship, and then the porosity calculated by seismic section was converted into permeability through this relationship. method has been applied in production. However, the control factors of porosity and permeability are different, and the relations...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/50G01N15/08
Inventor 吴宗蔚郭思陈虹
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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