Design of a cross-dipole array acoustic logging tool |
| |
Authors: | Junqiang Lu Xiaodong Ju Xiangyang Cheng |
| |
Affiliation: | 1. School of Resources and Information Technology,China University of Petroleum,Beijing 102249,China 2. School of Petroleum Engineering,China University of Petroleum,Dongying,Shandong 257061,China |
| |
Abstract: | When entering an anisotropic formation,a shear wave splits into a fast wave and a slow wave.Based on the principle of four-component cross-dipole acoustic wave measurement,the anisotropy of HTI (Horizontal Transverse Isotropy) formation can be determined.The method of calculating the fast and slow wave data when a shear wave propagates along the borehole axis in anisotropic formation was analyzed,and the implementation of a cross-dipole acoustic logging tool was demonstrated.The tool was composed of transmitter electronics,transmitter mandrel,acoustic isolator,receiver mandrel and main control electronics.Sonde,transmitter circuit,signal receiving and processing circuit,data acquisition system,system control circuit and telemetry interface circuit were presented and analyzed.The test model was used in production wells and standard wells in various areas and the four-component cross-dipole waves were acquired and processed.The waves had good signal-to-noise ratio and clear characteristics,and the fast and slow waveforms,processed slowness curves,anisotropy and fast shear wave azimuth well matched with each other. |
| |
Keywords: | Acoustic logging tool cross-dipole anisotropy electronics sonde |
本文献已被 维普 万方数据 SpringerLink 等数据库收录! |
| 点击此处可从《石油科学(英文版)》浏览原始摘要信息 |
|
点击此处可从《石油科学(英文版)》下载全文 |
|