| Experimental Study of the Main Influencing Factors in Mechanical Properties of Conglomerate |
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| 作者姓名： | ZHOU Bo GE Hongkui ZHOU Wei WANG Jianbo HAO Hongyong WANG Xiaoqiong LIU Pengyu |
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| 作者单位： | Research Institute of Experiment and Detection of Xinjiang Oilfield Company,Karamay 834000, China;Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000, China;Unconventional Oil and Gas Technology Research Institute, China University of Petroleum, Beijing 102249, China;China University of Petroleum-Beijing At Karamay, Karamay 834000, China |
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| 基金项目： | This project is sponsored by the Development of conglomerate reservoir laboratory in Xinjiang(2019D04008), the National Natural Science Foundation of China(51604287), the Research Foundation of China University of Petroleum-Beijing at Karamay(RCYJ2016B-01-001). |
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| 摘 要： | In recent years, with the success of exploration and development of conglomerate reservoirs in Mahu Depression, Junggar Basin, China, it is urgent to study the mechanical properties and its influencing factors of conglomerate which is considered as a new oil and gas reservoir. Based on the investigations of petrologic characteristics, heterogeneity and mechanical properties of conglomerate in Baikouquan formation, the content and geometric characteristics of gravel in conglomerate, the main factors in heterogeneity and the mechanical behavior in the triaxial compression experiment of conglomerate are analyzed in this paper. The results show that the size and content of gravel in conglomerate varies greatly, and conglomerate has strong heterogeneity under the influence of gravel content and size. An analysis of mechanical properties of conglomerate shows that conglomerate is characterized by plasticity. Besides, the sphericity is negatively correlated to the gravel content, while the heterogeneity increases with the increase of conglomerate plasticity. Due to the existence of heterogeneous gravel, local stress may concentrate in conglomerate when the stress is loaded. Consequently, a large number of micro-cracks appear at the edge of gravel, demonstrating the strong plasticity of conglomerate. This paper is of referential significance to the study of rock mechanical properties and the evaluation of engineering properties in conglomerate development.
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| 关 键 词： | Conglomerate Petrological characteristics Heterogeneity Mechanical properties Plasticity |
| 收稿时间： | 2019/12/17 0:00:00 |
| 修稿时间： | 2020/7/20 0:00:00 |
Experimental Study of the Main Influencing Factors in Mechanical Properties of Conglomerate |
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| ZHOU Bo,GE Hongkui,ZHOU Wei,WANG Jianbo,HAO Hongyong,WANG Xiaoqiong,LIU Pengyu.Experimental Study of the Main Influencing Factors in Mechanical Properties of Conglomerate[J].Earthquake Research in China,2020,34(3):430-451. |
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| Authors: | ZHOU Bo GE Hongkui ZHOU Wei WANG Jianbo HAO Hongyong WANG Xiaoqiong LIU Pengyu |
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| Institution: | Research Institute of Experiment and Detection of Xinjiang Oilfield Company,Karamay 834000, China;Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000, China;Unconventional Oil and Gas Technology Research Institute, China University of Petroleum, Beijing 102249, China;China University of Petroleum-Beijing At Karamay, Karamay 834000, China |
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| Abstract: | In recent years, with the success of exploration and development of conglomerate reservoirs in Mahu Depression, Junggar Basin, China, it is urgent to study the mechanical properties and its influencing factors of conglomerate which is considered as a new oil and gas reservoir. Based on the investigations of petrologic characteristics, heterogeneity and mechanical properties of conglomerate in Baikouquan formation, the content and geometric characteristics of gravel in conglomerate, the main factors in heterogeneity and the mechanical behavior in the triaxial compression experiment of conglomerate are analyzed in this paper. The results show that the size and content of gravel in conglomerate varies greatly, and conglomerate has strong heterogeneity under the influence of gravel content and size. An analysis of mechanical properties of conglomerate shows that conglomerate is characterized by plasticity. Besides, the sphericity is negatively correlated to the gravel content, while the heterogeneity increases with the increase of conglomerate plasticity. Due to the existence of heterogeneous gravel, local stress may concentrate in conglomerate when the stress is loaded. Consequently, a large number of micro-cracks appear at the edge of gravel, demonstrating the strong plasticity of conglomerate. This paper is of referential significance to the study of rock mechanical properties and the evaluation of engineering properties in conglomerate development. |
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| Keywords: | Conglomerate Petrological characteristics Heterogeneity Mechanical properties Plasticity |
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