The Cenozoic reef-banks reservoir in Qiongdongnan （琼东南） basin is one of the most profitable targets worthy of prospecting in the deep water area of the northwestern South China Sea. In this study, the characteris...The Cenozoic reef-banks reservoir in Qiongdongnan （琼东南） basin is one of the most profitable targets worthy of prospecting in the deep water area of the northwestern South China Sea. In this study, the characteristics of organic reef-like reflectors in southern uplift area of Qiongdongnan basin are analyzed based on the latest 2D and 3D seismic data. It is found that reef-like reflectors in Qiongdongnan basin show high-amplitude moundy continuous reflection at the top and the bottom, chaotic reflection inside the reef-like reflector and there is obviously speed difference between reef-like reflector body and surrounding rock. Combining the geological setting of reef and comparative analysis, the reef-like reflectors are considered to be the reef-banks. Furthermore, the results show that there are three kinds of reef structures in the southern uplift area of Qiongdongnan basin： the fault controlling structure, the fault flexure structure and the carbonate ramp structure. Each structure has its own grow-units that can reveal the growth process of the reef in order. The distribution of reef-like reflec- tors in space shows an arc belt pattern. According to this, four reef arc belts are identified, and their spatial trends are thought to have a good relationship with the buried fault. The internal structure con- stitution and the growth state of reef-like reflectors are mainly controlled by the geomorphology and monsoon-ocean current. The result has an instructive significance to oil-gas exploration of organic reef not only in Qiongdongnan basin, but also even in deep water areas of the South China Sea.展开更多
Whether a decision group does its function or not directly depends on the rationality of its characters. The decision science, also with other correlation disciplines, wants to know how the group characters affect the...Whether a decision group does its function or not directly depends on the rationality of its characters. The decision science, also with other correlation disciplines, wants to know how the group characters affect the group performance. Although there are great deals of means to describe the group characters theoretically and practically, in this paper, we consider that the integrity character of a group is composed of the group scale, the constitution and the structure. So the research on how group characters affect the group performance should focus on the three aspects. In order to grasp the present research situation and clear the prospective direction of the studies, we will summarize the study on how the group characters affect the group performance from these three aspects.展开更多
In the study,we explore the structural evolution of Cantor high-entropy alloy(HEA)under different super-cooling rates and its correlation with mechanical property variations by the developed machine learning-driven de...In the study,we explore the structural evolution of Cantor high-entropy alloy(HEA)under different super-cooling rates and its correlation with mechanical property variations by the developed machine learning-driven deep potential molecular dynamics(DPMD)simulation.Our results reveal the critical super-cooling rate of amorphization-crystallization transition of Cantor alloy and the local structure constitutions at different temperatures during the super-cooling process.The associated mechanical property studies demonstrate the glassy Cantor alloy amorphized at high super-cooling rate exhibits a superior capability of ductility but this capability is unrelated to the amorphization cooling rates.While the high strength of Cantor alloy requires a lower super-cooling rate which might result in the crystallization,amorphizing the Cantor alloy at the critical super-cooling rate of amorphizationcrystallization transition could compatibilize both ductility and strength capabilities.Such a discovery sheds new lights on the material development and its mechanical performance optimization for industrial applications.展开更多
基金supported by the SINOPEC Forward Looking Project of China (No. YPH08114)Petrochemical Joint Fund(No. 40839910)the Young Teacher Funding Project of China University of Geosciences (No. CUGQNL0826)
文摘The Cenozoic reef-banks reservoir in Qiongdongnan （琼东南） basin is one of the most profitable targets worthy of prospecting in the deep water area of the northwestern South China Sea. In this study, the characteristics of organic reef-like reflectors in southern uplift area of Qiongdongnan basin are analyzed based on the latest 2D and 3D seismic data. It is found that reef-like reflectors in Qiongdongnan basin show high-amplitude moundy continuous reflection at the top and the bottom, chaotic reflection inside the reef-like reflector and there is obviously speed difference between reef-like reflector body and surrounding rock. Combining the geological setting of reef and comparative analysis, the reef-like reflectors are considered to be the reef-banks. Furthermore, the results show that there are three kinds of reef structures in the southern uplift area of Qiongdongnan basin： the fault controlling structure, the fault flexure structure and the carbonate ramp structure. Each structure has its own grow-units that can reveal the growth process of the reef in order. The distribution of reef-like reflec- tors in space shows an arc belt pattern. According to this, four reef arc belts are identified, and their spatial trends are thought to have a good relationship with the buried fault. The internal structure con- stitution and the growth state of reef-like reflectors are mainly controlled by the geomorphology and monsoon-ocean current. The result has an instructive significance to oil-gas exploration of organic reef not only in Qiongdongnan basin, but also even in deep water areas of the South China Sea.
基金This paper is supported by the National Nature Science Foundation （NSF） （No.70371038）, and Excellent Innovative Research Group Funds Project from the NSF of China （No. 70121001）.
文摘Whether a decision group does its function or not directly depends on the rationality of its characters. The decision science, also with other correlation disciplines, wants to know how the group characters affect the group performance. Although there are great deals of means to describe the group characters theoretically and practically, in this paper, we consider that the integrity character of a group is composed of the group scale, the constitution and the structure. So the research on how group characters affect the group performance should focus on the three aspects. In order to grasp the present research situation and clear the prospective direction of the studies, we will summarize the study on how the group characters affect the group performance from these three aspects.
基金the financial support provided by project numbers 12305395 and 22476130 from the National Natural Science Foundation of China and National Science Fund for Distinguished Young Scholars of China(12225506)The computations in this paper were run on the Siyuan-1 cluster supported by the Center for High Performance Computing at Shanghai Jiao Tong University.
文摘In the study,we explore the structural evolution of Cantor high-entropy alloy(HEA)under different super-cooling rates and its correlation with mechanical property variations by the developed machine learning-driven deep potential molecular dynamics(DPMD)simulation.Our results reveal the critical super-cooling rate of amorphization-crystallization transition of Cantor alloy and the local structure constitutions at different temperatures during the super-cooling process.The associated mechanical property studies demonstrate the glassy Cantor alloy amorphized at high super-cooling rate exhibits a superior capability of ductility but this capability is unrelated to the amorphization cooling rates.While the high strength of Cantor alloy requires a lower super-cooling rate which might result in the crystallization,amorphizing the Cantor alloy at the critical super-cooling rate of amorphizationcrystallization transition could compatibilize both ductility and strength capabilities.Such a discovery sheds new lights on the material development and its mechanical performance optimization for industrial applications.
