基于GIS数据仓的油气化探评价模型

Geochemical prospecting evaluation model for oil and gas based on GIS data warehouse

在分析油气化探评价过程的基础上,提出了基于GIS(地理信息系统)数据仓的油气化探评价模型。给出了该模型的体系结构,分析了模型实现中的GIS数据仓模型构建、多源异构的大量地学数据集成及基于数据仓的多维度地学信息联机分析处理(OLAP)分析的综合评价技术等关键问题。利用该模型对渤海试验区东、西两个区块的苯和甲苯等化探数据进行评价,结果显示,试验区东区以天然气为主,有少量油;西区主要产油,伴生天然气。这与实际钻井结果吻合较好,说明所提出的评价模型以及模型构建技术能够很好地满足对油气化探异常进行油气资源评价的需求。

By analyzing the evaluation process of geochemical prospecting for oil and gas, a geochemical prospecting evaluation model for oil and gas based on GIS data warehouse was presented. The systematic structure of the model was given, Some key problems such as GIS warehouse model construction in model realization, large amount of geophysical/geology data integration with various sources and different structure and synthesized evaluation technique of multi-dimension spatial online analytical processing（OLAP） analysis based on warehouse were analyzed. The geochemical prospecting data for oil and gas in Bozhong sag were estimated by the model. The results show that gas dominates in the east experimental area with a little oil, and the situation in west area is the opposite. The results agree well with the knowned data. It is shown that the model and its construction method can satisfy the evaluation requirements of geochemical prospecting for oil and gas very well.