| 油气井CO2分压计算方法探讨 |
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| 引用本文： | 闫伟,邓金根,董星亮,张春阳,李杨,李文良.油气井CO2分压计算方法探讨[J].钻采工艺,2011,34(5). |
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| 作者姓名： | 闫伟 邓金根 董星亮 张春阳 李杨 李文良 |
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| 作者单位： | 1. 中国石油大学油气资源与探测国家重点实验室·北京
2. 中海石油有限公司·中国 |
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| 摘 要： | 正确计算油气井CO2分压是进行油套管防腐设计的基础.文章通过理论分析,得出气井CO2分压近似等于体系压力与CO2体积百分的乘积；油井的CO2分压为饱和压力与分离气中CO2摩尔百分含量的乘积,与井筒的流压无关.并通过实验研究说明了油套管钢在CO2中的腐蚀速率只与CO2气体的分压有关系,与体系总压无关.研究结果为油气井防腐研究及合理选择管柱材质提供了理论依据.
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| 关 键 词： | 油气井 CO2分压 饱和压力 腐蚀速率 体系压力 |
INVESTIGATION OF CALCULATION METHOD OF CO_2 PARTIAL PRESSURE IN OIL AND GAS WELL |
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| YAN Wei,DENG Jingen,DONG Xinliang,ZHANG Chunyang,LI Yang , LI Wenliang,. China National Offshore Oil Company.INVESTIGATION OF CALCULATION METHOD OF CO_2 PARTIAL PRESSURE IN OIL AND GAS WELL[J].Drilling & Production Technology,2011,34(5). |
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| Authors: | YAN Wei DENG Jingen DONG Xinliang ZHANG Chunyang LI Yang LI Wenliang China National Offshore Oil Company |
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| Affiliation: | YAN Wei1,DENG Jingen1,DONG Xinliang2,ZHANG Chunyang2,LI Yang1 and LI Wenliang1(1.College of Petroleum Engineering,China University of Petroleum(Beijing),2. China National Offshore Oil Company) |
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| Abstract: | The accurate calculation of CO2 partial pressure is the basis for casing and tubing corrosion protection design. Based on theoretical analysis,the conclusion is that CO2 partial pressure in gas well approximately equals to the product of system pressure and volume percentage of CO2;CO2 partial pressure in oil well is the product of saturation pressure and the percentile molar volume of CO2 and has no relationship with the wellbore pressure. Experimental study proved that the tubing's corrosion rate only dep... |
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| Keywords: | oil and gas well CO2 partial pressure saturation pressure tubing and casing corrosion |
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