WGA1000软件系统设计及定量分析方法优化研究

介绍了国内第一款用于录井系统的快速气相色谱-四极杆质谱联用气测仪WGA1000软件系统,说明了其设计原理和用户界面实现方法。该软件系统实现了对仪器的运行状态和参数的精确控制,以及对数据的快速采集与处理,可得到各组分的实时浓度值,并将该结果传送给终端服务系统,最终获得钻井过程中各组分浓度的变化趋势图;通过改进和优化线性校正方法与离子扫描方式,显著提高了气体组分定量计算结果的准确性和重复性。经过长期现场应用及模拟实验证明,WGA1000软件系统结合硬件及数据解析软件系统,能够满足目前气测录井系统在线气体分析仪器的实时监测要求。

Design and Optimization of Quantitative Analysis Method for WGA1000 Software System

This paper mainly introduced the design principle and user interface implementation as well as optimization of quantitative analysis method of software system for domestic first gas measuring instrument which is based on the fast gas chromatography quadrupole mass spectrometer. The WGA1000 software system is a real-time acquisition and control system. It’s based on Windows operating system, MFC programming realization, and its interface style is similar to the Office. The theme framework includes chromatogram control, mass spectrometer control, data acquisition, data playback, component quantitation, alarm and record as well as temperature and pressure control, ion scanning method, peak judgment, peak intensity calculation and concentration correction. So far, the software system has realized that instrument running state and parameters were precisely controlled, the real-time concentration values of each component were obtained by collecting and processing the data quickly, it’s worth noting that the concentration values were received through the software automatically deducting the background density under the condition of the same depth, the accuracy of the results are higher. Then the results were transmitted to the terminal service system, and finally the variation tendency of each component concentration was obtained in the drilling process. By observing and analyzing the change trend of each component concentration, the staff can quickly judge underground strata structure and the content of oil and gas. This work can largely improve the work efficiency and provide a guarantee for drilling safety. We found that in the previous work conventional linear fitting method tends to cause the intercept of fitting equation too big, leading to low signal concentration calculation error, It’s unsuitable for larger linear range data analysis, moreover, conventional ion scanning period is longer and leads to the less number of the points above the peak and the poor peak shape stability. Adopting subsection calibration can avoid the calculation error of the highest point and the lowest point and segmented ion scanning can increase the number of the points above the peak, quantitative results and repeatability of the target components have been significantly improved by optimizing the linear correction method and ion scanning mode. Another major breakthrough about the system is automatic step calculation especially for methane in order to increase the dynamic range. It has been approved after long-term field application and simulation experiments, WGA1000 software system combined with hardware and data analysis software can meet the real-time monitoring requirement of on-line gas measuring instrument in gas logging system.