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| 变系数二阶流体在偏心环空中非定常流压力梯度的数值计算 |
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崔海清1,李楠2,杨立国1,3,宋兴良1
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(1.东北石油大学 提高油气采收率教育部重点实验室,黑龙江 大庆 163318;2.中石油大庆油田公司 采油工程研究院,黑龙江 大庆 163453;3.中石油 吉林油田公司,吉林 松原 138000)
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| 摘要: |
| 建立给定流量条件下变系数二阶流体在内管做轴向往复运动的偏心环空中非定常流的瞬时压力梯度方程,给出这种流动的时均压力梯度公式及相应的数值计算方法;以HPAM水溶液为例,对其在内管做轴向往复运动的偏心环空中非定常流的时均压力梯度进行数值计算和室内试验。结果表明:环空偏心度对时均压力梯度有明显影响,内管冲程和冲次对时均压力梯度的影响不明显;试验验证了时均压力梯度公式及相应数值计算方法的正确性。 |
| 关键词: 变系数二阶流体 偏心环空 轴向往复运动 非定常流 压力梯度 |
| DOI：10.3969/j.issn.1673-5005.2011.01.011 |
| 分类号::TE 355.5 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(50674019);黑龙江省自然科学基金项目(A200501) |
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| Numerical calculation of pressure gradient of unsteady flow of the secondorder fluid with variable coefficients in eccentric annulus |
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CUI Haiqing1, LI Nan2, YANG Liguo1,3, SONG Xingliang1
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(1.Enhanced Oil and Gas Recovery Key Laboratory of Ministry of Education, Northeast Petroleum University, Daqing 163318, China;2.Production Engineering & Research Institute, Daqing Oilfield Company, PetroChina, Daqing 163453, China;3.Jilin Oilfield Company, PetroChina, Songyuan 138000, China)
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| Abstract: |
| An equation of instantaneous pressure gradient for the unsteady flow of the secondorder fluid with variable coefficients in eccentric annulus with the inner cylinder reciprocating axially under the precondition of a known flow rate was established. And a formula of time average pressure gradient and correspondent numerical method were presented. Using the HPAM aqueous solution, the time average pressure gradients of the unsteady flow of the fluid in eccentric annulus with the inner cylinder reciprocating axially were numerically calculated, and the correspondent experiments were carried out. The results show that the influence of the annulus eccentricity on the time average pressure gradient is obvious, while the influences of the stroke and the strokefrequency of the inner cylinder on the time average pressure gradient are not obvious. The correctness of the formula of time average pressure gradient and the correspondent numerical method was tested and verified through experimental results. |
| Key words: secondorder fluid with variable coefficients eccentric annulus reciprocating axially unsteady flow pressure gradient |
