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SZS-501A型变密度组合测井仪的引入主要为了测小井眼井的固井质量,本文介绍了仪器的结构和基本原理,其信号是采用单芯电缆上传到地面,电源部分由缆芯送下来的直流+100V电源,经过电感和电容隔离滤波后分别送各电源模块;井下仪自身产生发射脉冲,实现声波的发射控制。在与不同的仪器对比发现,该仪器能准确反应井筒信息,自身性能稳定,能准确评价固井质量。在生产应用中发现,其在带压测井和水平中使用优势明显,带压电缆密封效果好。
The introduction of SZS-501A densitometer combination logging instrument is mainly used to measure the well cementing quality of slimhole. This article introduces the structure and basic principle of the instrument. The signal is uploaded to the ground with single-core cable and the power supply is delivered by cable core Down the DC +100 V power supply, respectively, after the inductor and capacitor isolation filter to send the power module; downhole instrument to generate a launch pulse, the launch of sound control. In comparison with different instruments, it is found that the instrument can accurately reflect the wellbore information and has stable performance and can accurately evaluate the cementing quality. In production applications, it is found that it has obvious advantages in the use of pressure logging and horizontal drilling, and the sealing effect of pressured cable is good.