摘要:
针对火烧油层过程中点火温度确定过高导致井筒管柱变形的难题,研制了一种火烧油层原油自燃点测试装置.根据点火过程中高温高压、 温压突变以及时间短等特点,设计了高温高压反应釜、 安全保护系统、 数据采集系统和注入系统.自燃点测试装置耐压50 MPa,耐温700°C,通过测温探头及压力传感器将釜内温度和压力传输至PC端实现实时监测,显示点燃时刻的温度和压力,当温压超过设定阈值时,利用电接点压力表控制加热装置系统自动停止加热,自动泄压,有效地提高整体装置的安全性.试验结果可直接判断原油自燃点和燃烧剧烈程度,其监测结果标准差优于1°C,具有良好的重复操作性.火烧油层原油自然点测试装置能够模拟储层不同压力温度条件测试原油自燃温度,实现了原油在着火过程中温度的精确、 自动、 安全监测,可为火烧油层的点火工艺提供指导.%In order to solve the problem that the ignition temperature is too high to cause the deformation of the pipe string in the process of in-situ combustion, a test device for auto-ignition temperature of crude oil has been developed. According to the characteristics of high temperature, high pressure, abrupt change of temperature and pressure and short time in ignition process, a high temperature and high pressure reactor, a safety protection sys-tem, a data acquisition system and an injection system have been designed. The auto-ignition temperature test de-vice has a pressure resistance of 50 MPa and has a temperature resistance of 700°C. The temperature and pressure are transmitted to the PC by the temperature probe and pressure sensor to achieve real-time temperature and pres-sure monitoring and display. When the temperature exceeds the setting threshold, the electric contact pressure meter is used to control the heating system, and automatically stops heating and releases the pressure, which effectively improves the safety of the whole device. The experimental results can directly identify the crude oil auto-ignition temperature and its burning intensity. The standard deviation of monitoring result is lower than 1 °C, and it has good repetition. The auto-ignition temperature test device for crude oil in in-situ combustion can simulate the auto-ignition temperature of crude oil under different pressure and temperature conditions, and realize accurate, automat-ic and safety monitoring of crude oil in the process of ignition, which can provide guidance for the ignition process of the in-situ combustion.