地球化学场分析方法与油气化探

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，而同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所地球化学指标表征，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。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。而在探讨同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

GEOCHEMICAL FIELD ANALYSIS AND OIL/GAS GEOCHEMICAL EXPLORATION

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.