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| 气驱油采油采液指数计算方法及影响因素 | |
| 引用本文： | 李宁,孙雷,冯乔,张晓林,张立强.气驱油采油采液指数计算方法及影响因素[J].复杂油气藏,2014(4):57-61. |
| 作者姓名： | 李宁 孙雷 冯乔 张晓林 张立强 |
| 作者单位： | 1. 西南石油大学油气藏地质及开发工程国家重点实验室,四川 成都,610500 2. 中国石油大学石油工程教育部重点实验室,北京,102249 3. 中国石化华北石油局第二采油厂,宁夏 吴忠,751500 |
| 基金项目： | 十二五国家重大专项子课题《低渗低丰度储层可动用条件评价研究》(子课题编号2011ZX05015-001-04)。 |
| 摘 要： | 针对X凝析气藏气井初期产量高、递减速度快、普遍存在地层和井底反凝析等现象，在陈元千方法的基础上完善了油气相渗曲线的归一化方法，分析了基质岩心和人工压缝岩心的相渗曲线特点。从凝析气驱油过程中油气相渗曲线变化规律出发，研究了低渗凝析气藏无因次采油指数、无因次采液指数的计算方法、变化规律以及影响因素。研究结果表明：较大的油气粘度比和较小的M值（启动压力梯度与生产压力梯度的比值）更有利于气井高含气阶段的提气携液。 |
| 关 键 词： | 低渗透致密砂岩 凝析气藏 气驱油 无因次采液指数 无因次采油指数 |
Calculation method and influencing factors of fluid productivity index in the process of gas flooding |
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| Authors: | Li Ning Sun Lei Feng Qiao Zhang Xiaolin Zhang Liqiang |
| Affiliation: | Li Ning, Sun Lei, Feng Qiao, Zhang Xiaolin, Zhang Liqiang (1. State of Key Laboratory of Oil ＆Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China; 2. MOE Key Laboratory of Petroleum Engineering in China University of Petroleum,Beifing 102249, China; 3. No. 2 Oil Production Plant of North China Petroleum Bureau ,SINOPEC , Wuzhong 751500, China) |
| Abstract: | For X condensate gas-reservoir,there are high initial production rate,rapid production decline rate,common retrograde condensation at borehole bottom or in the formation.On the basis of Chen Yuanqian method,we improved the nor-malization method for oil and gas relative permeability curves,and analyzed the characteristics of relative permeability curves for matrix and artificial fractured cores.According to the change rule of oil/gas relative permeability curves in the process of condensate gas flooding,it was studied that the calculation method for dimensionless oil/fluid productivity index,the change rules,and its influence factors in low permeability condensate gas reservoir.The research results showed that larger viscosity ratio of oil and gas and smaller M value,which is the ratio of start-up pressure gradient and production pressure gradient, are advantageous to improve production rate and liquid-carrying capacity of gas wells at high gas-cut stage. |
| Keywords: | low permeability tight sandstone condensate gas reservoir gas drive dimensionless fluid productivity index |
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