| 低渗气藏启动压力梯度研究与分析 |
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| 引用本文： | 依呷,唐海,吕栋梁. 低渗气藏启动压力梯度研究与分析[J]. 海洋石油, 2006, 26(3): 51-54 |
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| 作者姓名： | 依呷 唐海 吕栋梁 |
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| 作者单位： | 西南石油大学,研究生院,四川,成都,610500;西南石油大学,研究生院,四川,成都,610500;西南石油大学,研究生院,四川,成都,610500 |
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| 摘 要： | 在低渗透气藏中,气体渗流是否存在启动压力梯度以及启动压力梯度存在条件一直是石油工作者研究和争论的焦点之一。通过一系列实验,研究了低渗透气藏中气体渗流存在启动压力梯度的条件,获得了气藏有效渗透率大于0.1×10-3μm2或束缚水饱和度低于20%时,不存在启动压力梯度;并定量化了启动压力梯度与束缚水饱和度之间的关系。
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| 关 键 词： | 低渗透油气藏 启动压力 非达西流 束缚水饱和度 实验研究 |
| 文章编号： | 1008-2336（2006）03-0051-04 |
| 收稿时间： | 2005-12-01 |
| 修稿时间： | 2006-02-27 |
The study and analysis of starting pressure gradient in low permeability gas reservoirs |
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| Yi Ga,Tang Hai,Lv Dongliang. The study and analysis of starting pressure gradient in low permeability gas reservoirs[J]. Offshore Oil, 2006, 26(3): 51-54 |
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| Authors: | Yi Ga Tang Hai Lv Dongliang |
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| Abstract: | In the gas reservoirs with low permeability,whether there is starting pressure gradient or not and the qualification of starting pressure gradient appearance in the gas seepage is always one of the debate focus among the petroleum researchers.This article presents a series of experiments to obtain the qualification of starting pressure gradient appearance in the gas reservoirs with low permeability,and concludes that when the permeability of gas reservoirs is bigger than 0.1×10~(-3)μm~2 or the irreducible water saturation is less than 20%,there isn't starting pressure gradient.This paper also presents the formula between the starting pressure gradient and irreducible water saturation. |
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| Keywords: | gas reservoir with low permeability starting pressure gradient non-darcy flow irreducible water saturation experiment research |
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