正交偶极声波测井换能器全尺寸数值模拟
Full-Scale Numerical Simulation for Cross-Dipole Acoustic Logging Transducer
时鹏 1陈文辉 1刘付火 1强晟 2杨帆 1张永超1
作者信息
- 1. 中国石油集团测井有限公司测井技术研究院,陕西 西安 710077;中国石油天然气集团有限公司测井重点实验室,陕西 西安 710077
- 2. 中国石油集团测井有限公司长庆分公司,陕西 西安 710077
- 折叠
摘要
正交偶极声波测井换能器是多极子声波类测井仪器的关键部件,其频率响应和指向性等性能直接影响偶极声波测井数据质量和地层精确评价.偶极声波理论中的偶极声源为理想点源,由于正交偶极声波测井换能器尺寸较大,从几何尺寸上不能看作理想偶极子点源.该文基于有限元方法对正交偶极换能器展开全尺寸数值模拟研究,分析正交偶极换能器在水中的频率响应和指向性等性能,指出其指向性性能随频率变化的原因.研究结果表明,正交偶极换能器的指向性随频率变化,在某些频段与理想偶极指向性差异明显.
Abstract
The cross-dipole acoustic logging transducer is a key component of multipole acoustic logging tools.Its frequency response and directive property directly affect the quality of dipole acoustic logging data and the accuracy of formation evaluation.In the theory of dipole acoustic logging,the dipole source is an ideal point source,while the cross-dipole acoustic logging transducer is in big size and cannot be regarded as an ideal dipole point source in terms of geometric dimensions.This paper conducts full-scale numerical simulation research on cross-dipole acoustic logging transducer based on the finite element method,analyzes the frequency response and directional performance of cross-dipole transducer in water,and points out the reasons for their directional performance changing with frequency.The results show that the directivity of the orthogonal transducer varies with frequency,in most frequency bands,the directionality of cross-dipole acoustic logging transducer differs significantly from that of ideal dipole source.
关键词
声波测井/偶极声波/声波测井换能器/指向性/数值模拟Key words
acoustic logging/dipole acoustic/acoustic logging transducer/directive property/numerical simulation引用本文复制引用
基金项目
中国石油天然气集团有限公司项目(2020B-3713)
中国石油集团测井有限公司科技攻关项目(CNLC2023-9C01)
出版年
2024
国家科技期刊平台
NSTL
万方数据