Prediction of methane adsorption content in continental coal-bearing shale reservoir using SLD model |
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| Authors: | Jizhen Zhang Daye Chen |
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| Affiliation: | 1. Key Laboratory of Exploration Technologies for Oil and Gas Resources (Yangtze University), Ministry of Education, Wuhan, P. R. China;2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing, P. R. China;3. ZhangJZ1991@126.com tyj_cjdx@qq.com;4. Key Laboratory of Shale Gas Exploration and Evaluation, Ministry of Landand Resources (Beijing), Beijing, P. R. China |
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| Abstract: | Shale gas, as an important unconventional resource, has drawn global attention. It is mainly composed of adsorption gas and free gas. Adsorption gas content could play an important guiding role on both the selection of favorable perspective area and the exploration and exploitation of shale gas resources. In order to accurately measure adsorption gas content, a new approach was established to predict the adsorption isotherm of methane on shale. Based on the simplified local-density (SLD) method, both the adsorption isotherms of illite, illite/smectite mixed-layer, cholorite and type III kerogen and the total shale rock could be well fitted. The fitting results show good coincidences with the true experimental test data, which proves the method is reasonable and dependable and the prediction results are effective and credible. In addition, the good simulation results show that the SLD parameters can reflect the pore structure characteristics and corresponding adsorption characteristics of the shale samples, which can be used for the quantitative characterization of shale pore system. |
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| Keywords: | methane adsorption shale shale gas simplified local-density |
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