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以油井蒸汽重力辅助泄油(SAGD)技术中应用的超长(>700m)热电偶测温系统为例,对前端传感器的组成、监测工艺、测温仪表以及井下温度数据在SAGD开采过程中所起到的作用进行详细介绍。测温仪表方面,采用硬件处理及软件修正方法达到超长热电偶测温系统极限误差±0.866℃,整个系统运行稳定可靠。SAGD应用方面,实时的井下多点温度数据为蒸汽腔发育情况判断、上下水平井热连通情况判断、转抽时机判断、汽窜井工艺措施的实施方面起到一定的指导作用。
Taking the ultra-long (> 700m) thermocouple temperature measurement system used in the well steam-assisted gravity drainage (SAGD) technology as an example, the composition, monitoring technology, temperature measuring instrument and downhole temperature data of the front sensor during the SAGD mining process The role of play a detailed introduction. Temperature measurement instruments, the use of hardware processing and software correction method to achieve long-term thermocouple temperature measurement system error ± 0.866 ℃, the entire system is stable and reliable. For SAGD applications, real-time downhole multi-point temperature data can be used to judge the development of steam chambers, to determine the thermal connectivity of the upper and lower horizontal wells, to determine when the pump is turned on, and to implement the technical measures of steam channeling well.