| 低渗透变形介质渗透率时变效应规律及对油田开发的影响 |
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| 引用本文： | 高永利,张志国.低渗透变形介质渗透率时变效应规律及对油田开发的影响[J].地质科技情报,2012,31(3):70-72. |
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| 作者姓名： | 高永利 张志国 |
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| 作者单位： | 1. 西安石油大学石油工程学院,西安,710065
2. 长庆油田公司采油一处,甘肃合水,745400 |
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| 摘 要： | 针对低渗透油田开发过程中存在的时变效应,以室内实验为基础,结合数值模拟方法研究了低渗透油藏渗透率时变效应规律及其对油田开发效果的影响.结果表明,上覆压力越大,渗透率时变伤害率越大,上覆压力增大至一定值之后,上覆压力的变化对渗透率伤害率的影响不大.渗透率越小,渗透率时变伤害率越大.当渗透率小于0.1×10-3 μm2时,渗透率时变伤害明显增大,同时难以恢复到原渗透率条件,裂缝性岩心时变伤害大且伤害后恢复更加困难.时变效应对渗透率的伤害主要集中在井筒附近,无因次半径越小,渗透率伤害越大；在相同的生产压差下,时变效应系数越大,油井产量越低.
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| 关 键 词： | 变形介质 渗透率 时变效应 低渗透油田 开发 |
Rule of Permeability Trend Change of the Times and Its Influence on Development in Low Permeability Deformation Medium Reservoir |
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| GAO Yong-li
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ZHANG Zhi-guo.Rule of Permeability Trend Change of the Times and Its Influence on Development in Low Permeability Deformation Medium Reservoir[J].Geological Science and Technology Information,2012,31(3):70-72. |
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| Authors: | GAO Yong-li ZHANG Zhi-guo |
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| Institution: | 1.College of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,China; 2.The 1st Oil Production Department,Changqing Oilfield Branch Company,Heshui Gansu 745400,China) |
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| Abstract: | Aimed at permeability trend change of the times accompanied development,this paper studies the rule of trend change of the times by means of lab test.Based on this,permeability trend change of the time and its influence on development are also analysed by using numerical simulation.Study results show that the relationship between permeability trend change of the times damage coefficient and pressure has power function.Permeability damage mainly concentrated around the bore hole neighbouring,the smaller dimensionless radius,and the bigger permeability being damaged.The permeability trend change of the times damage coefficient is bigger,and the productivity is lower in same producing pressure drop. |
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| Keywords: | deformation medium permeability trend change of the times low permeability oilfield development |
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