| 鄂西渝东区志留系流体封存箱的演化与天然气成藏 |
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| 引用本文： | 胡晓凤,丁青.鄂西渝东区志留系流体封存箱的演化与天然气成藏[J].海相油气地质,2011,16(3):38-44. |
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| 作者姓名： | 胡晓凤 丁青 |
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| 作者单位： | 中国石化江汉油田分公司勘探开发研究院 |
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| 摘 要： | 因鄂西渝东区志留系勘探程度甚低,长期以来志留系一直被视为烃源层或盖层.随着建深1井在志留系钻获高压工业气流,曾经的"思维定式"发生了改变.通过对志留系油气成藏条件及碳、氧、锶稳定同位素追踪流体行为轨迹的分析认为,该区志留系具有自源供烃的特点以及流体相对封闭的独特性,这是形成志留系下统龙马溪组、小河坝组以及志留系中统韩家...
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| 关 键 词： | 鄂西渝东地区 志留系 流体封存箱 同位素地球化学 天然气成藏 |
Evolution of Silurian Fluid Compartments and Gas Accumulation in Western Hubei-Eastern Chongqing Area |
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| Hu Xiaofeng,Ding Qing.Evolution of Silurian Fluid Compartments and Gas Accumulation in Western Hubei-Eastern Chongqing Area[J].Marine Origin Petroleum Geology,2011,16(3):38-44. |
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| Authors: | Hu Xiaofeng Ding Qing |
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| Abstract: | The Silurian strata distributed in the Western Hubei-Eastern Chongqing area were counted once as source rock or cap rock for a long time due to low mature prospecting but the past concept has changed with discovering high-pressured commercial gas flow in Well JS-1 in this area.By analysis of the hydrocarbon accumulation and the fluid behavior tracing from isotope δ13C,δ18O and 87Sr/86Sr,it is shown that the Silurian strata are characterized by self-source hydrocarbon and self-reserving conditions with relatively independent fluid sealing,which is the dominant causation to bring on several abnormally high-pressured fluid compartments from the Lower Silurian Longmaxi and Xiaoheba Formations to the Middle Silurian Hanjiadian Formation.In the whole evolution process,the Silurian hydrocarbon accumulation and preservation have been well under control of the Silurian compartments which were formed before Early Yanshanian,reformed during the middle to late phases of Early Yanshanian and shaped during Late Yanshan-Himalayan periods. |
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| Keywords: | Silurian Fluid compartment Gas accumulation Isotopic geochemistry Western Hubei Eastern Chongqing |
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