稠油水平井热力开采监测工艺技术研究

针对现有热采测试工艺和技术不适应水平井热采测试需要的问题,研究开发了光纤光栅监测技术,并开发了测试光缆水平井施工工艺设备,解决了测试光缆的水平段推入问题。经室内实验和现场试验,各项技术指标均达到设计要求。光纤光栅监测技术对测量信息采用光谱频率和波长编码,测量距离和测量信息不受光源功率、光纤弯曲等因素影响,可在一支特制的光纤上准确定位测量多组光栅传感器,实现了温度与压力的同步连续测量。采用耐温400℃的高分子材料屏蔽铠装成井下测试光缆,光纤和传感器封装后可抗5t的拉力,传感器安装在一个复杂的结构内。通过井下热动态变化监测,可确认合理的注汽量和焖井时间。当井下注汽温度与压力的动态变化稳定,井下温场与注汽参数达到热平衡时为最佳注汽量;当油藏汽腔消失,温场降速平稳,压力下降幅度平稳时,即为合理的焖井时间。

Technology Research on Thermal Monitoring of the Horizontal Wells in Heavy Oil Recovery

The present testing technology in thermal recovery can't meet the demands of the test of the thermal recovery by the horizontal well.Monitoring technology using optical fiber and raster was researched,and the equipments of testing photo cable in the horizontal well operation were developed with the result of solving the problem of horizontal section pushing in.Laboratory and field experiments show that each technical parameter has reached the design requirements.Monitoring technology by the optical fiber an...