地球化学场分析方法与油气化探

GEOCHEMICAL FIELD ANALYSIS AND OIL/GAS GEOCHEMICAL EXPLORATION

在分析油气化探现状的基础上，指出油气化探的实质是对油气地球化学场的研究，而油气地球化学场研究相对较弱是制约油气化探工作的主要因素。油气地球化学场可由各种油气地球化学指标表权，如烃类或次生碳酸盐浓度、荧光强度等在空间区域上的分布，是一个多重（即多变量的）标量场。油气地球化学场基本上可视为稳定场，场的空间结构分析对于油气化探尤为重要。而在探讨油气化探异常形成机理时则必须同时研究场的时间演化即时间结构和空间结构，或简称时空结构。比较详细地讨论了地球化学场的3类分析方法，即地球化学场的统计学分析方法、动力学分析方法和复杂性研究方法，提出了具体的研究思路和技术。

On the basis of a brief analysis of current status of oil/gas geochemical exploration, it is pointed out in this paper that theessence of oil/gas geochemical exploration is to investigate the oil/gas reservoir related geochemical field which is defined asthe spatial distribution of geochemical index such as concentrations of hydrocarbons and secondary carbonate and is a multi-variated field by nature. Relative ignorance of the study of geochemical field is believed to be the main cause of the slowdevelopment of the discipline. Geochemical fields can be considered as stable for most oil/gas explorational purPoses andspatial structure analyses of the field are there fore of leading importance, but when investigating the forming mechanism ofthe field, a spatio-temporal structure analysis must be done. The authors give out a more detailed discussion of three kinds ofmethodology of geochemical field analysis, i. e. the statistical, dynamic and complex analyses. The main research methodsand techniques are also discussed.