| 试论柴达木盆地第四系盖层的封盖机理 |
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| 引用本文： | 张祥,纪宗兰,杨银山,曾惠兰,王永强,李宝山.试论柴达木盆地第四系盖层的封盖机理[J].天然气地球科学,2004,15(4):383-386. |
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| 作者姓名： | 张祥 纪宗兰 杨银山 曾惠兰 王永强 李宝山 |
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| 作者单位： | 1. 西南石油学院,四川,南充,637001
2. 青海油田,甘肃,敦煌,736202 |
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| 摘 要： | 通过对柴达木盆地第四系高孔隙度、低突破压力和具有一定渗透性的特殊盖层研究后指出:这种特殊盖层封盖天然气的机理在于其中饱和高矿化度的地层水;泥岩盖层中孔隙流体压力同下伏气藏压力值很接近;区域盖层厚度巨大;盖层是源岩层;区内气候寒冷,冰冻期长,冰川广布。
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| 关 键 词： | 柴达木盆地 第四纪 生物气 盖层遮挡（地质）机理 |
| 文章编号： | 1672-1926(2004)04-0383-04 |
THE DISCUSSION UPON SEALING MECHANISM OF QUATERNARY CAP ROCK IN QAIDAM BASIN |
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| ZHANG Xiang,JI Zong-lan,YANG Ying-shan,ZENG Huai-lan,WANG Yun-qing,LI Bao-shan.THE DISCUSSION UPON SEALING MECHANISM OF QUATERNARY CAP ROCK IN QAIDAM BASIN[J].Natural Gas Geoscience,2004,15(4):383-386. |
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| Authors: | ZHANG Xiang JI Zong-lan YANG Ying-shan ZENG Huai-lan WANG Yun-qing LI Bao-shan |
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| Affiliation: | ZHANG Xiang~1,JI Zong-lan~2,YANG Ying-shan~2,ZENG Huai-lan~2,WANG Yun-qing~2,LI Bao-shan~2 |
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| Abstract: | Through the researches onthe special Quaternary cap rock with the characteristics of high porosity, low breakthrough pressure and some permeability in qaidamu Basin, the parper points out that the sealing mechanism of the cap rock lies in the high salty formation water existing inside the cap rock. The fluid pressure in mudstone pores approximately equals to the pressure in gas reservoir below; the thickness of regional cap rock in very high and the cap rock itself belongs to source rock. The cold climate in the region insures a great amount of ice being formed so that the natural gas can be accumulated and preserved. |
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| Keywords: | Qaidamu basin Quaternary Biologica gas Cap rock sealing mechanism(geological) |
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