中文摘要：

针对现有数据集成方案在处理特定问题时系统查询性能不理想的情况，以Mediator／Wrap-per集成模式为基础，结合数据仓库思想，提出1种异构数据集成的优化方案．该方案基于XML和元数据设计查询构造、解析搜索及缓存等模块，优化系统的查询性能．将该方案应用于石油储层评价系统的数据集成中能明显缩短查询的平均耗用时间，提高查询效率。

英文摘要：

To solve the problem that the current scheme of heterogeneous data integration can not query efficiently in the specific cases, combined with the Mediator/Wrapper architecture and the warehousing method, an optimized solution on heterogeneous data integration is proposed. Based on XML and metadata, several modules such as query construction, parsing and search, and caching are designed to optimize query performance. The solution is introduced into an evaluation system of petroleum reservoir to implement data integration of neural network system of reservoir identification, which can distinctly shorten av- erage query time and improve query efficiency.