The Development of Defect Calibration Sample Tube on Compressed Natural Gas Underground Gas Storage Well

This paper analyzes common defects of CNG underground gas storage well, determines manual calibration defect form, the size and distribution of the related defect in an attempt to develop a set of defect calibration sample tubes, which are to be used in gas storage well testing and research to solve the lack of defect calibration sample tubes, to provide reference calibration signal, and to lay the foundation for the establishment of the evaluation standard in the later stage.