井下光电压力计设计

分析了光学材料的光弹性效应及线偏振光的干涉理论，结合井下压力计的特点，设计了一种新型的井下压力计——光电压力计，该压力计能够在流体流动或关井条件下沿井眼测量某一目的深度上的流体压力。该光电压力计是通过光电测力元件将流体压力信号转换成偏振干涉光的光强信号，最后由光电探测器转变为电信号传至地面信息处理系统．随后把电信号转变成相应的压力信号。并且，设计有温度补偿系统，能够排除温度的影响。文章从理论分析验证了这种流体压力传感器的可行性，用光电检测技术代替传统的生产测井压力测量方法，可以进一步提高生产测井流体压力的测量精度和减少测量环境的干扰。

Design of a downhole photoelectric manometer

The optic elastic effect of optic material,the interference theory of linear polarization light and the characteristics of the manometers for production logging are analyzed to design a new type of downhole photoelectric manometer.With the downhole photoelectric manometer,the information of fluid pressure at target depth can be measured whether the fluid is flowing or the well is closed.Firstly,the information of fluid pressure in the well is converted to the intensity information of linear polarization interference light through photoelectric material.Secondly,the intensity information is converted to electric information,and then is transmitted to surface system.Finally,electric information is converted to pressure value.In addition,a temperature compensator is designed to eliminate the temperature effect in time.The feasibility of this method has been proved by theoretical analysis.With photoelectric detection technology instead of conventional methods,the measuring precision of fluid pressure can be improved and environmental interference can also be deduced.