Daihai Lake, a modern lacustrine rift basin, located in Inner Mongolia, North China, serves as an important modern analog for understanding deltaic depositional processes in an active rift setting. Two of the deltas ...Daihai Lake, a modern lacustrine rift basin, located in Inner Mongolia, North China, serves as an important modern analog for understanding deltaic depositional processes in an active rift setting. Two of the deltas (Yuanzigou delta and Bulianghe delta) on the margins of Daihai Lake were surveyed to compare and contrast stacking patterns using aerial photographs, field trenching and sediment sampling. Shallow cores and trench data collected from the margins of Daihai Lake indicate that a variety of depositional processes have been active since Daihai Lake formed. Two 3-D sedimentation models which employ chronostratigraphic correlation technique were generated. The chronostratigraphic sedimentation models predict and represent the architectures and sand-body continuity of sediments. Stratigraphical coincidence of the broad sheeted drifts and channel erosion suggests a coupling between downslope and alongslope processes. Distributary mouth bars are prevalent in the front of deltas on steeper slopes due to the dominance of down-slope flows. On the contrary, the along-slope currents favor the development of distal bar deposits with sheeted sandbodies on gentle depositional slopes. This study provides an insight into the architecture of complex sedimentary facies associated with highlighting key differences between downslope flows and alongslope currents. The distribution of sand within these deltas is of particular interests, with applications in understanding the architecture of hydrocarbon reservoirs formed in lacustrine rift basin.展开更多
如何对区域综合能源系统(regional integrated energy system,RIES)进行科学有效的评估是发展RIES亟需解决的问题。为此,文章提出一种基于物元可拓模型的RIES综合效益评价模型。首先,对RIES的多参与主体的利益关系进行分析,并在此基础...如何对区域综合能源系统(regional integrated energy system,RIES)进行科学有效的评估是发展RIES亟需解决的问题。为此,文章提出一种基于物元可拓模型的RIES综合效益评价模型。首先,对RIES的多参与主体的利益关系进行分析,并在此基础上建立了涵盖政府、电网、RIES投资运营商、用户多主体利益驱动的RIES综合效益评价指标体系,其指标反映了RIES的能源、环境、经济、安全等特性。其次,对于该指标体系存在的多主体利益相矛盾、指标值易受不确定性因素影响的特点,提出一种集值迭代法与反熵权法主客观组合赋权的物元可拓评估决策模型,以实现对RIES综合效益的定量评价。最后,通过算例验证了所提方法的有效性。展开更多
基金supported by the Chinese National Natural Science Fund Project(41072084)National Program on Key Basic Research Project(973 Program)(No. 2009CB219502-3)Prof.Qiu Yinan at RIPED(Research Institute for Petroleum Exploration and Development) of CNPC(China National Petroleum Corporation) for his belief in this work and financial support of the research
文摘Daihai Lake, a modern lacustrine rift basin, located in Inner Mongolia, North China, serves as an important modern analog for understanding deltaic depositional processes in an active rift setting. Two of the deltas (Yuanzigou delta and Bulianghe delta) on the margins of Daihai Lake were surveyed to compare and contrast stacking patterns using aerial photographs, field trenching and sediment sampling. Shallow cores and trench data collected from the margins of Daihai Lake indicate that a variety of depositional processes have been active since Daihai Lake formed. Two 3-D sedimentation models which employ chronostratigraphic correlation technique were generated. The chronostratigraphic sedimentation models predict and represent the architectures and sand-body continuity of sediments. Stratigraphical coincidence of the broad sheeted drifts and channel erosion suggests a coupling between downslope and alongslope processes. Distributary mouth bars are prevalent in the front of deltas on steeper slopes due to the dominance of down-slope flows. On the contrary, the along-slope currents favor the development of distal bar deposits with sheeted sandbodies on gentle depositional slopes. This study provides an insight into the architecture of complex sedimentary facies associated with highlighting key differences between downslope flows and alongslope currents. The distribution of sand within these deltas is of particular interests, with applications in understanding the architecture of hydrocarbon reservoirs formed in lacustrine rift basin.
文摘如何对区域综合能源系统(regional integrated energy system,RIES)进行科学有效的评估是发展RIES亟需解决的问题。为此,文章提出一种基于物元可拓模型的RIES综合效益评价模型。首先,对RIES的多参与主体的利益关系进行分析,并在此基础上建立了涵盖政府、电网、RIES投资运营商、用户多主体利益驱动的RIES综合效益评价指标体系,其指标反映了RIES的能源、环境、经济、安全等特性。其次,对于该指标体系存在的多主体利益相矛盾、指标值易受不确定性因素影响的特点,提出一种集值迭代法与反熵权法主客观组合赋权的物元可拓评估决策模型,以实现对RIES综合效益的定量评价。最后,通过算例验证了所提方法的有效性。