大斜度井双侧向测井响应的数值模拟

针对大斜度井复杂的测井环境和双侧向电极系的工作原理,采用三维有限元法模拟在有侵入、多层地层情况下大斜度井中双侧向仪器的测井响应.模拟采用先考虑井眼和仪器,然后考虑地层交界面的网格划分方法,可以灵活地对各种井斜角和侵入情况进行考虑.模拟结果与国内外文献给出的结果取得了很好的一致性, 所以该算法是可靠的.利用该算法还对井斜角和侵入对测井响应曲线的影响作了研究.

Numerical Simulation of Dual Laterolog Response in Highly Deviated Wells

Three-dimensional finite element method is used here to simulate the response of the dual laterolog tool in highly deviated wells with mud invasion and multiple layers based on complex logging environments in deviated wells and electrode of dual laterolog tool. In the mesh generation, geometries of the tool and borehole are first considered, then the interfaces of the different layers. In doing so different deviations and different invasion depths can be easily considered in the simulation. The validity of the program is proven by comparison with the results given by other researchers. And with the aid of this program, the effects of the logging environment are studied.