Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole Model
Reservoir fracture evaluation is an important research topic in the coalfield. In recent years, complex resistivity (CR) has been widely used in oil logging and achieved good results, such as permeability evaluation, water saturation (Sw) prediction, and aquifer identification. Therefore, the method...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/4913767 |
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| _version_ | 1832552165963464704 |
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| author | Jian Li Dongji Lei Chenguang Zhao Hui Meng |
| author_facet | Jian Li Dongji Lei Chenguang Zhao Hui Meng |
| author_sort | Jian Li |
| collection | DOAJ |
| description | Reservoir fracture evaluation is an important research topic in the coalfield. In recent years, complex resistivity (CR) has been widely used in oil logging and achieved good results, such as permeability evaluation, water saturation (Sw) prediction, and aquifer identification. Therefore, the method has the potential to evaluate coal seam fracture. In the experiment, the real part R and imaginary part X of bituminous and anthracite coal with different Sw were measured by the impedance measuring instrument, then the Double Cole-Cole model was used to fit experimental data and analyze conductive mechanism. The main results are as follows: (1) the dispersion of CR parameters Reρ and Imρ is closely related to the metamorphism degree, frequency, and Sw; (2) induced polarization is the fundamental reason for the variation of coal samples’ complex resistivity parameters with frequency change; and (3) the Double Cole-Cole model agrees well with the experimental data, and the model parameters m1 and τ2 are strongly correlated with Sw. The parameters m1 and τ2 can be used to evaluate the Sw of fractures in coal seams and thus to evaluate the effect of hydraulic fracturing. |
| format | Article |
| id | doaj-art-7685f59d307745a69184b5f82bb523d2 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-7685f59d307745a69184b5f82bb523d22025-02-03T05:59:23ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/49137674913767Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole ModelJian Li0Dongji Lei1Chenguang Zhao2Hui Meng3College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaCollege of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology, Beijing 10083, ChinaCollege of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaReservoir fracture evaluation is an important research topic in the coalfield. In recent years, complex resistivity (CR) has been widely used in oil logging and achieved good results, such as permeability evaluation, water saturation (Sw) prediction, and aquifer identification. Therefore, the method has the potential to evaluate coal seam fracture. In the experiment, the real part R and imaginary part X of bituminous and anthracite coal with different Sw were measured by the impedance measuring instrument, then the Double Cole-Cole model was used to fit experimental data and analyze conductive mechanism. The main results are as follows: (1) the dispersion of CR parameters Reρ and Imρ is closely related to the metamorphism degree, frequency, and Sw; (2) induced polarization is the fundamental reason for the variation of coal samples’ complex resistivity parameters with frequency change; and (3) the Double Cole-Cole model agrees well with the experimental data, and the model parameters m1 and τ2 are strongly correlated with Sw. The parameters m1 and τ2 can be used to evaluate the Sw of fractures in coal seams and thus to evaluate the effect of hydraulic fracturing.http://dx.doi.org/10.1155/2019/4913767 |
| spellingShingle | Jian Li Dongji Lei Chenguang Zhao Hui Meng Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole Model Advances in Civil Engineering |
| title | Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole Model |
| title_full | Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole Model |
| title_fullStr | Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole Model |
| title_full_unstemmed | Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole Model |
| title_short | Complex Resistivity Dispersion Characteristics of Water-Bearing Coal Based on Double Cole-Cole Model |
| title_sort | complex resistivity dispersion characteristics of water bearing coal based on double cole cole model |
| url | http://dx.doi.org/10.1155/2019/4913767 |
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