基于非均匀背景地层的阵列感应测井聚焦方法研究  

On Inhomogeneous Background-based Focusing(IBF) Method for Array Induction Logs

作　　者：解茜草[1] 仵杰[1] 

机构地区：[1]西安石油大学陕西省光电传感测井重点实验室,陕西西安710065

出　　处：《测井技术》2011年第6期538-543,共6页Well Logging Technology

摘　　要：当遇到严重的非线性地层时,阵列感应测井的标准聚焦结果会出现错误。以Born几何因子近似理论为基础,研究了基于非均匀背景地层的聚焦方法(IBF)。IBF根据HDIL(High-definition Induction Logging)测井数据变化特征,估计出二维非均匀背景地层模型,进而得到背景地层每个纵向深度点上的侵入电导率、地层电导率、侵入深度及过渡带深度等关键参数。背景地层处理结果与残差处理结果相加后进行分辨率匹配得到对应3种分辨率6个探测深度的残差处理结果。采用IBF方法得到的2ft分辨率匹配曲线尖角得到消除,不同探测深度曲线分离关系合理。研究结果表明,当地层非线性严重时,IBF方法比标准聚焦方法能得到更好的处理效果。The standard focusing result of array induction logging is prone to inaccurate when there is serious nonlinear formation. The inhomogeneous background-based focusing （IBF） method is detailed based on the born geometric factor approximation theory. Based on log data change characteristics of HDIL（High-definition Induction Logging）, IBF can estimate 2D inhomogeneous background formation model, and then get the background formation key parameters in different depths, such as invasion conductivity, formation conductivity, invasion depth and transition zone depth, etc. Adding processing result of background formation with that of residual error, and doing resolution matching, we get residual error processing result corresponding to 3 different resolutions and 6 logging depths. The 2 ft resolution matching curve processed by IBF method shows that the burr of curve is eliminated, and the separate relationship of curves for different depths is reasonable. It is concluded that the IBF results are better than those produced with the standard focusing method if the formation nonlinearity is serious.

关 键 词：阵列感应测井 非均匀地层 Born几何因子 聚焦方法 非线性 

分 类 号：P631.84[天文地球—地质矿产勘探]