Research for key techniques of geophysical recognition system of hydrocarbon-induced magnetic anomalies based on hydrocarbon seepage theory
基于烃渗漏理论的油气异常地球物理判别系统的关键技术研究

Hydrocarbon seepage effects can cause magnetic alteration zones in near surface,and the magnetic anomalies induced by the alteration zones can thus be used to locate oil-gas potential regions.In oder to reduce the inaccuracy and multi-resolution of the hydrocarbon anomalies recognized only by magnetic data,and to meet the requirement of integrated management and sythetic analysis of multi-source geoscientfic data,it is necessary to construct a recognition system that integrates the functions of data management,real-time processing,synthetic evaluation,and geologic mapping.In this paper research for the key techniques of the system is discussed.The system uses the ArcGIS as the secondary development platform,inherits the basic functions of the ArcGIS,and develops two main sepecial functional modules,the module for conventional potential-field data processing methods and the module for feature extraction and enhancement based on image processing and analysis techniques.The system can be applied to realize the geophysical detection and recognition of near-surface hydrocarbon seepage anomalies,provide technical support for locating oil-gas potential regions,and promote geophysical data processing and interpretation to advance more efficiently.