| 用三维时域有限差分法研究随钻声波测井仪器隔声体的设计 |
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| 引用本文： | 杨勇,车小花,张菲,李俊.用三维时域有限差分法研究随钻声波测井仪器隔声体的设计[J].科学技术与工程,2009,9(3). |
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| 作者姓名： | 杨勇 车小花 张菲 李俊 |
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| 作者单位： | 油气资源与探测国家重点实验室,中国石油大学(北京),北京,102249 |
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| 基金项目： | 国家自然科学基金重点项目，国家自然科学基金面上项目，高等学校博士学科点专项科研基金 |
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| 摘 要： | 在柱坐标系中,利用三维时域有限差分方法研究了随钻声波测井仪器的隔声体设计.结果表明,不同结构的隔声体对钻铤纵模式波的时延量和隔声量存在很大差异.一种由周期性交错排列的凹槽构成的隔声体,相比于由圆环形凹槽构成的隔声体,具有更好的隔声效果.
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| 关 键 词： | 随钻测井 时域有限差分 隔声 数值模拟 |
Designing Isolator of Logging-While-Drilling Acoustic Tools Using Three-dimensional Finite-difference Time-domain Method |
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| YANG Yong,CHE Xiao-hua,ZHANG Fei,LI Jun.Designing Isolator of Logging-While-Drilling Acoustic Tools Using Three-dimensional Finite-difference Time-domain Method[J].Science Technology and Engineering,2009,9(3). |
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| Authors: | YANG Yong CHE Xiao-hua ZHANG Fei LI Jun |
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| Abstract: | Based on the first order velocity-stress scheme on staggered grids, a three dimensional (3-D) finite-difference time-domain (FDTD) is applied to numerical study the designing of isolator of Logging-While-Drilling (LWD) acoustic tool in cylindrical coordinates. Simulation results show that different periodic grooved isolators vary widely in delaying and attenuating the tool waves which propagate along the tool. A type of isolator with staggered grooves is proposed for better performance. |
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| Keywords: | logging-while-drilling finite-difference time-domain sound isolation numerical modeling |
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