基于合成聚焦的高分辨率侧向测井仪数值模拟研究

Numerical simulation of high resolution laterolog tool based on computed focusing

针对目前日益增多的复杂井测井需求,开发了基于软件和硬件合成聚焦方式的高分辨率侧向测井仪器.通过聚焦算法和测量模式的优化设计,可以同时获得2条标准分辨率深、浅电阻率曲线和2条高分辨率深、浅电阻率曲线.数值模拟分析显示,合成聚焦测量模式与硬件聚焦具有相同的物理效应,高分辨率侧向测井仪器具有良好的纵向探测特性和径向探测特性.与常规侧向测井仪器相比,仪器整体长度缩短一半左右(5m),可以有效提高复杂井的适用性,具有良好的应用前景.

A high resolution laterolog tool based on computed focusing is developed to meet the need of increasing complex well exploration.The tool can simultaneously yield standard deep and shallow laterolog curves,high resolution deep and shallow laterolog curves by the optimization design of focus algorithm and measurement mode.The results of simulation indicate that computed focusing and hardware focusing have same physical effect.The high resolution laterolog tool is described has good performance,which improves the efficiency of logging and vertical resolution by halving the length of traditional dual laterolog tool to 5 meters,and improves the application in complex wells,shows good application prospects.