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本文描述了一种主要用于石油测井的井壁数字超声成象系统,论述了井下仪器、地面设备和室内微机图象处理系统的工作原理,介绍了在测量裸眼井与套管井方面的应用效果.井下仪的最高环境温度可达175℃,可测井径为100～250mm,图象分辨力为512×512,井径测量精度为1mm.可用该系统测量井壁岩层裂纹、孔洞和套管的腐蚀、射孔等情况;同时还可以精确描绘井眼的截面图形.实际应用表明,该系统有良好的地质应用效果.
This paper describes a borehole digital ultrasound imaging system mainly used for oil well logging. The working principle of downhole equipment, surface equipment and indoor PC image processing system is described. The application of measuring open hole and cased hole is introduced The downhole instrument can reach a maximum ambient temperature of 175 ° C, a measurable borehole diameter of 100-250 mm, an image resolution of 512 × 512 and a caliper measurement accuracy of 1 mm. The system can be used to measure the rock wall cracks, holes and sleeves Pipe corrosion, perforating and so on.At the same time, the cross-sectional shape of wellbore can be accurately depicted.The practical application shows that the system has a good geological application effect.