多井电阻率成像测井古水流方向分析方法及实例应用

摘要

Optimized is the single well paleocurrent direction analysis workflow and proposed is a new approach for analyzing multiple well paleocurrent direction with borehole imaging data.To improve the accuracy of the single well paleocurrent direction analysis,many optimum methods are used due to many inquence facters on the analysis.First,structural axis is computed by combining multiple well structural dips; second,the paleocurrent direction analysis workflow is improved with structural axis and an integrated workflow is summarized which is suitable for various structure types.Moreover,the paleocurrent direction can be displayed in 2D & 3D vector map to help us understand the horizontal and vertical changes.From case study,it is proved that this approach may improve the accuracy of paleocurrent direction analysis and benefit sand body prediction.%优化了单井古水流方向分析的流程,研究提出多井电阻率成像测井古水流方向分析方法.针对影响单井古水流分析的多种因素,采取不同的优化方法,提高单井古水流分析的准确性.在准确定量计算单井构造倾角的基础上,综合考虑多井构造的变化,求解整体构造轴线的产状；对古水流方向分析流程进行进一步优化,形成一套完善的、适合不同构造形态的古水流分析方法；对不同砂层组提供独立的二维或三维古水流矢量图,得到古水流在纵向和横向上变化情况.实例应用效果表明,该方法能够丰富古水流方向显示手段,提高古水流方向分析的准确度,为进一步预测砂体展布提供有利信息.