共查询到20条相似文献,搜索用时 62 毫秒
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弹状流是管内气流两相流中的常见流型,在垂直及倾斜管中,为了精确预测弹状流的含气率及压降,必须知道大泡即所谓Taylor泡在静止液体内的上升速度,采用差压的方法对Taylor泡在垂直同心环形管内的上升速度进行了实验测定。并将实验值与几种关系式的计算值进行了比较,对环形管的内管旋转对Taylor泡上升速度的影响进行了实验研究及一定的理论分析,并给出了一个预测Taylor泡在内管旋转的环形管液柱中上升速度的关系式。 相似文献
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内管旋转的垂直同心环形管内单相流动特性的试验研究 总被引:1,自引:0,他引:1
分别以空气、油、水为工作介质对内管旋转的垂直同心环形管内的单相流动特性进行了系统的试验研究。首先在100 Re 70000的范围内对内管不转的环形管内的摩擦阻力进行了试验测定,并与几种摩阻关系式进行了比较,得出同心环形管内紊流摩擦系数比圆管摩擦系数约高6%~10%,Sadatomi的关系式可用于4000 Re 70000的范围内的紊流计算。采用测量轴向摩擦压降的方法,对内管旋转的环形管内的流动离心不稳定性以及摩阻进行了试验研究,得出了直径比小于0.8时,层流向层流+Taylor涡旋的转换边界及紊流+Taylor涡旋向紊流的过渡边界,并针对不同流型给出了适用于较大环形间隙环形管的摩阻关系式。 相似文献
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垂直上升管内油气两相流动截面含气率的测量 总被引:1,自引:0,他引:1
采用水平—上升管组合法测量了垂直上升管内油气两相流动在泡状流和弹状流情况下截面含气率的值。同时,应用漂移通量模型对试验结果进行了预测,预测值与试验结果吻合良好,从而证实了此方法在工程应用中是一种简单、准确和可行的测量方法。 相似文献
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��ֱ������Һ���൯״���Ͷ��������������� 总被引:3,自引:0,他引:3
本文是在垂直管中气液两相气泡流的流动规律基础上,对弹状流和段塞流的初步探讨,得出了弹状流和段塞流条件下的空隙率和压降的相关表达式。并进行了实验验证。 相似文献
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采用水平—下降管组合法测量了垂直下降管内油气两相流动在泡状和弹状流下截面含气率的值。同时,应用漂移通量模型对实验结果进行了预测,预测值与实验结果吻合良好,证明该方法是一种简单、准确、可行的测量方法,值得在工程中推广应用。 相似文献
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多相流广泛存在于空气钻井、氮气钻井、高压喷射钻井、泡沫钻井、完井修井作业及管道输送等领域中。多相流的研究在确保工程顺利实施方面起着极为重要的作用,在很大程度上关系到钻井、固井等质量的优劣与成败。为此,对垂直下降管流的流型转变及其流型间的转变界线进行了研究,得出了垂直下降管内油气水三相流动可分为W/O型泡状流、弹状流及环状流和O/W型泡状流、弹状流及块状流的结论。通过动力学分析,分别建立了泡状流与弹状流的转变、弹状流与环状流的转变的理论模型,实际计算表明,理论转变曲线与实验曲线基本吻合。 相似文献
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采油过程中,酸化是油气井增产、注水井增注的主要措施。砂岩基质酸化和碳酸岩基质酸化都是在低于储层破裂压力的条件下向地层中注入酸液,溶解地层中的可溶物质,清除孔隙或裂缝中的堵塞物质,从而使油气井增产或注水井增注的一种工艺措施。本文着重讨论了砂岩酸化的设计计算方法,并由此建立一套基质酸化设计方法。 相似文献
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《Oil and Energy Trends》2008,33(5):6-7
This section summarizes downstream developments of the previous month. Exploration & Production are covered in 'Upstream Review'.
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
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