【摘 要】
：
This paper uses pollen climate analysis and coexistence analysis to systematically analyze the climatic evolution of the Shahejie Formation in the Chezhen Depression,Bohai Bay Basin,eastern China and discusses the relationship between palaeoclimatic evolu
【机 构】
：
Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China;Hubei Key Laboratory
论文部分内容阅读
This paper uses pollen climate analysis and coexistence analysis to systematically analyze the climatic evolution of the Shahejie Formation in the Chezhen Depression,Bohai Bay Basin,eastern China and discusses the relationship between palaeoclimatic evolution and lake level rise.The results show that the sedimentary period of the Shahejie Formation in the Chezhen Depression had an overall temperature change trend from hot to cold and simultaneously experienced a dry and wet balance-wet-dry and wet balance-wet transition process.The climatic parameters of the Shahejie Formation in the Chezhen Depression include a mean annual temperature of 8.1℃-15.1℃,a mean coldest monthly temperature of-0.1℃-2℃,a mean warmest monthly temperature of 18.6℃-28℃,a mean annual precipitation of 389-1164 mm,a wettest monthly precipitation amount of 215-262 mm,and a driest monthly precipitation amount of 8-48 mm.Climate change is believed to affect the rise and fall of lake levels to some extent.The quantitative reconstruction of these climatic parameters allows researchers to more intuitively understand the geological background of the Chezhen Depression and guide the exploration and development of oil and gas resources.
其他文献
Understanding the damage behavior and cracking mechanism of brittle shale is crucial for hydraulic fracturing design.In this research,uniaxial compression tests are conducted on shale samples with different bedding plane orientations,and acoustic emission
A validated particle flow code (PFC2D)-based model was developed to investigate the indirect tensile mechanical behavior of shale containing two central parallel cracks under Brazilian splitting test conditions.The results show that preexisting cracks hav
Pore pressure is an important parameter in coalbed methane (CBM) exploration and development;however,the distribution pattern and mechanism for pore pressure differences in the Upper Permian CBM reservoirs are poorly understood in the western Guizhou regi
在法向量位置模型的惯性导航力学编排下,提出了一种适用于全球的阻尼算法,在出入极区时可保持阻尼过程的连续性,并且在水下长航时的背景下能够有效提高导航精度.根据法向量位置模型下的惯性导航误差微分方程,分别在垂直通道和水平通道中设计了阻尼网络,水平通道实现了基于法向量位置模型的三阶无静差阻尼算法.基于北极实际航行数据的仿真试验结果表明,提出的阻尼算法同时适用于极区与非极区,抑制了周期性振荡,定位的归一化误差最大值相比于无阻尼系统大约减小了47％.
To visualize and analyze the impact of uncertainty on the geological subsurface,on the term of the geological attribute probabilities (GAP),a vector parameters-based method is presented.Perturbing local data with error distribution,a GAP isosurface suite
Surface and deep subsurface geological struc-tural trends,stratigraphic features,and reservoir charac-teristics play important roles in assessment of hydrocarbon potential.Here,an approach that integrates digital eleva-tion modelling,seismic interpretatio
The sandstone of the third member of the Funing Formation (E1f3) in the northern slope zone of the Gaoyou Sag has the typical characteristics of high porosity and ultralow permeability,which makes it difficult for oil to flow.In this study,the lithologica
Investigation into natural fractures is extremely important for the exploration and development of low-permeability reservoirs.Previous studies have proven that abundant oil resources are present in the Upper Triassic Yanchang Formation Chang 7 oil-bearin
Special deposition environment makes organic-rich shales in Ningwu Basin have type Ⅲ kerogen and high kaolinite content,which are also famous as the kaolinite ore.The specific composition of shale in Ningwu Basin can change the pore structure and thus,inf
Prediction of shale gas production is a challenging task because of the complex fracture-pore networks and gas flow mechanisms in shale reservoirs.Empirical methods,which are used in the industry to forecast the future production of shale gas,have not bee