| 油气藏中沥青垫的研究进展 |
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| 引用本文： | 张敏,蔡春芳.油气藏中沥青垫的研究进展[J].地质科技情报,1997,16(1):81-84. |
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| 作者姓名： | 张敏 蔡春芳 |
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| 作者单位： | 江汉石油学院 |
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| 摘 要： | 沥青垫是油气藏中沥青质相当富集的含油储层带，其沥青质的相对含量为２０％￣６０％，而对应的油层中其值不足２０％，沥青垫在凝析油气藏和轻质油藏中出现的频率高，常位于非渗透性隔层之上的高孔隙和较高水平渗透率的砂岩储层中，研究表明沥青垫的主要形成机理为：脱沥青作用，重力分离作用，生物降解作用和油－水相互作用，石油运移作用。
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| 关 键 词： | 沥青垫 油气藏 形成机理 |
ADVANCES IN THE RESEARCH OF TAR MATS IN OIL AND GAS RESERVOIRS |
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| Zhang Min,Cai Chunfang,Zhang Jun.ADVANCES IN THE RESEARCH OF TAR MATS IN OIL AND GAS RESERVOIRS[J].Geological Science and Technology Information,1997,16(1):81-84. |
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| Authors: | Zhang Min Cai Chunfang Zhang Jun |
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| Abstract: | Tar mat is a reservoir zone containing petroleum strongly enriched in asphaltene in oil and gas reservoirs.The relative asphaltene abundance of gross composition ranges from 20% to 60%,but the value is below 20% in the related oil layer Tar mats are often found in condensate oil and gas reservoirs and light oil reservoirs,and they are situated in high porosity and high horizontal permeabillity sandstone layers above permeability barriers.Several main processes leading to tar mat formation have been proposed,including deasphalting,gravity segregation of oil columns,biodegradation,water oil interactions,and petroleum migration. |
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| Keywords: | tar mat oil and gas reservoir advance formation mechanism |
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