高精度井下存储式电子压力计的设计

摘要

In order to more accurately measure and obtain stratum pressure data, the high precision downhole storage electronic pressure gauge was researched.The electronic pressure gauge was composed of the downhole equipment and ground handling The former completed the borehole pressure and temperature collection and storage with ADuC834 MUC as the core.The latter achieved downhole data playback and processing The structure and the indicators of electronic pressure gauge was described.The hardware design and software design of this system were detailed, and the performance of pressure gauge was tested.Testing and field work showed that the instrument could achieve pressure accuracy within 0.05％ in the range of -40℃～150℃ to meet the requirements of underground testing%为了更准确地测取地层压力数据,研制了高精度井下存储式电子压力计.该压力计由井下仪器和地面处理2个部分组成:井下仪器以ADuC834单片机为核心,完成井内压力和温度的采集和存储;地面处理实现井下数据回放和处理.详述了该仪器结构和指标、系统硬件设计以及软件设计方案,并对压力计的性能进行测试.测试及现场工作表明,该仪表能够实现-40℃～150℃范围内的压力测量,测压精度达到0.05%,满足井下测试要求.