| 提高套管井电场数值计算精度的方法研究 |
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| 引用本文： | 李灿苹.提高套管井电场数值计算精度的方法研究[J].测井技术,2010,34(2):135-137,142. |
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| 作者姓名： | 李灿苹 |
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| 作者单位： | 广东海洋大学信息学院,广东,湛江,524088 |
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| 基金项目： | 国家重点基础研究发展973计划项目，广东海洋大学人才引进专项基金资助项目 |
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| 摘 要： | 准确求取井轴上的电位值对获得地层电阻率非常重要.研究了套管井电阻率测井过程中套管井中电场数值计算的精度和稳定性.介绍了套管井地层电阻率测井原理.给出了计算套管井中井轴上电场电位的2种方法:积分法和留数法.采用积分法计算的电位值在场源距较小时是可取的,但由于被积函数具有振荡性,致使其结果不稳定.采用留数法计算的电位值随着场源距的变大而呈指数规律地迅速减小,很好地反映了电场中的物理规律又提高了电位值的精度.数值计算结果表明,采用留数法的电位值计算结果更稳定,且精度高.
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| 关 键 词： | 电阻率测井 套管井 电场 数值计算 积分法 留数法 精度 |
On Numerical Calculation Precision in Cased Hole Electric Field |
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| LI Canping.On Numerical Calculation Precision in Cased Hole Electric Field[J].Well Logging Technology,2010,34(2):135-137,142. |
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| Authors: | LI Canping |
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| Affiliation: | LI Canping(School of Information,Guangdong Ocean University,Zhanjiang,Guangdong 524088,China) |
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| Abstract: | It is important to calculate electric potential value in borehole axis accurately for obtaining formation resistivity.With regard to this,the precesion and stability of cased hole electric field numerical computation in the process of cased hole formation resistivity logging data are studied.Introduced is the principle of cased hole formation resistivity logging.Two methods,integration and residue method,for calculating cased hole electric potential value in borehole axis are given.The electric potential va... |
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| Keywords: | resistivity logging casing hole electric field numerical calculation integral method residue method precision |
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