200℃偶极发射换能器研究

Research and experiment of 200℃ dipole acoustic transducer

高温偶极子发射换能器是200◦C高温多极子阵列声波测井仪器研发需要攻克的主要核心关键技术问题之一。针对这一问题,该文从材料选型和工艺改良两个方面开展技术攻关,研发了耐温达200℃偶极子发射换能器,样机耐温性能测试表明其能够在200℃下连续工作12 h而不损坏,声性能测试样机最大发射电压响应为124 dB,具有与现用换能器相当的辐射性能,样机尺寸及工作频率与现用换能器几乎完全一致,可以方便地对现用仪器进行升级。目前搭载该样机的仪器已经通过孤古8实验井测试,并在新疆顺北油田现场近9000 m井下取得高质量数据,达到设计目的。该文为开展更高温换能器研发提供了详细的研究思路。

High-temperature dipole transducer is one of the main key technologies needed to be tackled in the research and development of the 200℃ multipole array sonic logging tools.Focusing on this shortcoming,this paper carries out technical researches from the following two aspects:material selections and process improvement,and finally a 200℃ dipole transducer sample is successfully developed.The results of sample temperature test show that it can work continuously at 200℃ more than 12 hours without damage.The transmitting voltage response is up to 124 dB,which is nearly the same as that of current dipole transducer at room temperature.The dimension of the sample is totally the same as that currently used in logging instrument,so it is very convenient to upgrade current instrument.Now the sample carried in the instrument has passed the test of GUGU8 experimental well,and also has obtained high quality data in the nearly 9000 m deep well of the ShunBei oilfield in Xinjiang province,which achieves the beginning design purpose.This paper provides a new research thinking for developing higher temperature transducer.