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A Method for Interpreting Well Log Permeability

A technique of permeability and well logging, which is applied in earthwork drilling and production, wellbore/well components, etc. It can solve the problems that the interpretation model cannot be widely applied to actual results, inconsistent, and lack of production dynamic verification.

Inactive Publication Date: 2017-10-13
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

Permeability interpretation using well logging data is the most common practice at present. Conventional well logging software interpretation uses empirical formulas and theoretical models to calculate permeability. often lead to the final explanatory model not being widely applicable or inconsistent with actual results

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  • A Method for Interpreting Well Log Permeability
  • A Method for Interpreting Well Log Permeability
  • A Method for Interpreting Well Log Permeability

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with drawings and embodiments.

[0032] The present invention provides a logging permeability interpretation method, specifically comprising the following steps:

[0033] (1) Interpretation of granularity. Since the storage space is dominated by the remaining primary intergranular pores, followed by some or a small amount of intergranular dissolved pores and feldspar dissolved pores, there are also a small amount of intragranular dissolved pores and a small amount of matrix micropores. It mainly develops sheet-shaped, curved sheet-shaped throats, and constricted throats, with a pore-throat boundary of 4 μm. The particle size sorting is moderately deviated, and it is mainly a particle support structure, mainly composed of pore cementation.

[0034] The fractal dimension of the pore structure calculated by the image method ranges from 1.60 to 1.89, and its value reflects the relative size of pores and ...

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Abstract

The invention relates to a well logging permeability interpretation method. The well logging permeability interpretation method includes the first step of conducting granularity interpretation, porosity interpretation and water saturation interpretation, the second step of conducting permeability interpretation through a permeability interpretation model, and the third step of verifying the permeability interpretation model through granularity comparison, permeability model actual measurement inspection and permeability model actual measurement production characteristic inspection. The well logging permeability interpretation method integrates static experiments, well logging and dynamic testing data, the scientific method of mathematical statistics is used, an interpretation result is verified after objective analysis evaluation based on geological conditions, and the model result is objective, real and convenient to use.

Description

technical field [0001] The invention relates to a logging permeability interpretation method, which belongs to the technical field of mining. Background technique [0002] Permeability is a very important parameter in reservoir evaluation. At present, there are two main ways to obtain reservoir permeability, one is to measure directly through experiments or engineering means, and the other is to obtain it based on geophysical method interpretation. The former includes core test measurement method, cable formation test method, drill pipe formation test method, etc., and the latter includes logging interpretation permeability and seismic interpretation permeability, etc. Due to different acquisition methods and the sensitivity of permeability itself, the other The values ​​vary greatly. [0003] There are two main aspects to verify the accuracy of the permeability. One is the comparison with the actual measurement of the core. However, due to the influence of the sample qual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 潘琳李龙龙姜平关闻王建袁晓蔷
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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