基于Freeman链码的岩心交叉裂缝分离算法

Cross crack separation algorithm for core crack based on Freeman chain code

在石油地质领域中,裂缝研究是油气勘探的重点。而且,岩心裂缝统计参数分析的准确程度,对油气勘探开发和提升采收率都有着一定程度的影响。由于岩心裂缝中存在大量的交叉裂缝,会对裂缝的统计和计算裂缝的分布特征造成影响。因此,本文在识别岩心裂缝的基础上,通过改进Freeman链码直线检测算法,对细化后的交叉裂缝骨架进行分离;通过分离的裂缝骨架对整个交叉裂缝进行分离。实验结果证实,该算法能较好地对交叉裂缝进行分离。

In the field of oil geology,crack research is the focus of oil and gas exploration,and the accuracy of core crack statistical parameter analysis has a certain impact on oil and gas exploration.However,there are a large number of cross cracks in the core,which will have a great impact on the statistics and calculation of crack distribution characteristics and will affect the analysis of oil and gas exploration.In this paper,based on the identification of core cracks,the cross crack skeleton is separated by Freeman chain code linear detection algorithm,and then the whole cross crack is separated by the separated crack skeleton.The experimental results show that the proposed algorithm can separate the cross cracks well.