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| 1 | Characteristics and accumulation model of the late Quaternary shallow biogenic gas in the modern Changjiang delta area, eastern China显示文摘The Changjiang(Yangtze)is one of the largest rivers in the world.It formed a huge incised valley at its mouth during the Last Glacial Maximum;the incised-valley fill,approximately 80–110 m thick,supplies an important foundation for the generation of shallow biogenic-gas reservoirs.Two cores and 13 cone penetration tests were used to elaborate the characteristics,formation mechanism,and distribution of the shallow biogenic-gas reservoirs in the study area.The natural gas is mainly composed of CH_4(generally[95%)with a δ^(13)C_(CH4) and δ^(13)C_(CO2) of-75.8 to-67.7% and -34.5 to-6.6%,respectively,and a δD_(CH4) of-215 to-185%,indicating a biogenic origin by the carbon dioxide reduction pathway.Commercial biogenic gas occurs primarily in the sand bodies of fluvial-channel,floodplain,and paleo-estuary facies with a burial depth of 50–80 m.Gas sources as well as cap beds are gray to yellowish-gray mud of floodplain,paleoestuary,and offshore shallow marine facies.The organic matter in gas sources is dominated by immature type III kerogen(gas prone).The difference in permeability(about4–6 orders of magnitude)between cap beds and reservoirs makes the cap beds effectively prevent the upward escape of gas in the reservoirs.This formation mechanism is consistent with that for the shallow biogenic gas in the late Quaternary Qiantang River incised valley to the south.Therefore,this study should provide further insight into understanding the formation and distribution of shallow biogenic gas in other similar postglacial incised-valley systems. | Xia Zhang Chun-Ming Lin | 2017 | Petroleum Science2017，14，2： | 5 |
| 2 | Geochronological Records of Oil-Gas Accumulations in the Permian Reservoirs of the Northeastern Ordos Basin显示文摘油气体累积(OGA ) 的地球年代学是在多周期的石油地质学的一个挑战性的题目附加的盆。由 K-Ar, authigenic illite (AI ) 和液体包括(FI ) 分析标明日期与磷灰石分裂轨道结合了(在船尾) 热建模,在东北 Ordos 盆(击) 抑制二叠的水库的 OGA 时间的案例研究在这份报纸被进行了。二叠的 oil-gas-bearing 沙岩核心样品标明日期的 AI 显示出 178108 妈的一个宽时间领域。AI 年龄的分发介绍主要 OGA 在二叠的水库处理的 2 阶段,它分别地与 165 妈和 130 妈的 2 山峰年龄在 175155 妈和 145115 妈的时间域发展了。现在二组织与的在船尾热的路径上的样品和他们的投射年龄的 FI 温度山峰不仅一低并且一座高山峰在 9078hallow 地下水的范围的温度能满足国家标准。(2 ) 从 coalbed 生产的水主要包含了 NaCl 獲漠 ? 慗整 ? 潃牰摯 ' 讚攥?潃污敢 ? 慇? 湡 ? 桓污潬 ? 片畯摮慷整 ? 湩 ? 畩楬? 潃污楦汥? 景 ? | CHEN Gang YANG Fu LI Shuheng ZHANG Huiruo HU Yanxu LEI Panpan | 2013 | Acta Geologica Sinica(English Edition)2013，87，6： | 4 |
| 3 | Study of the optical transmission enhancement properties in a one-dimensional Ag film with different single slit groove structures显示文摘Numerical simulation has been performed on the optical transmission enhancement properties of a one-dimensional Ag film single slit structure with grooves. The results show that the position,depth and number of the grooves have great influence on the optical transmission,and surface plasmon polariton and resonance mode are the primary factors. The maximal extinction ratio of 35.8 dB is achieved in the single slit structure by adjusting groove depth. | YANG Jing-jing HUANG Ming YU Jiang SHI Ji-hong PENG Jin-hui | 2008 | Optoelectronics Letters2008，4，6： | 3 |
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