Presents a general Field-Oriented Data Center (FODC) for WEB services. Using the semantic integration, data mapping, data warehouse and other data integration technologies, not only achieves seamless integration of distributed heterogeneous data sources, but also realizes data sharing and data exchanging between distributed heterogeneous data sources and the FODC. Therefore, the model provides a unified data services for WEB services. In an application of the model-Oil and Gas Production System Software Integration Platform, established the Science Data Cloud in the field of the oil and gas well production of China, solved the massive, distributed heterogeneous data organic integration and seamless sharing problems, and presented a WEB service platform for oil and gas production, with production management, equipment management, workflow control, optimal design, fault diagnosis, decision support and other functions. The case verified the correctness and feasibility of the model.