Research On The Data Exchange Model Of Oilfield Development Field Based On Ontology

With the extending of the oil exploration and development business, the number of thespecialized fields involved in the oil field is becoming more and more larger, and the data typegenerated in every specialty is more and more complex and rich. In order to adapt to the rapiddevelopment of information technology, enterprises and institutions have developed their owndata model, which is also unique. With the continuous improvement of the data models andbusiness processes, there become a large number of heterogeneous data models. Mutualsharing of these models becomes more and more hard. So, the need of the data integration andexchange in oil field becomes more and more prominent. A general data exchange model isurgently needed to solve the heterogeneous data exchange of oil field.Firstly, research on the current domestic and international data exchange technology istaken. And the related data exchange standards in oil field are analyzed. Combined with theactual demand of data exchange in oilfield development field and the introduction of theontology and Web Service technology, the data exchange architecture model is proposed,which includes three main functional layers, the application layer, the logic layer and the datalayer. And the definition of these three layers is specified. Then the data exchange processbased on the model is defined. Secondly, the relevant definitions of the data exchange modelare given. Research is mainly forcus on two aspects, the building of the local ontology of datasource and the ontology mapping between local ontology. Forcus on the disadvantage ofcurrent local ontology building, the graph model, called O-Graph, is proposed based on therelational schema, which could be used for the semantic discovery from the relational schema.Moreover, the mapping rule between relational schema and local ontology is defined.Through the research on the relational schema, the semantic information discovered from theO-Graph and the mapping rule, automatical building of the local ontology from data source isrealized. Then, based on the XeOML, recombine and redefine the mapping between datasource and the mapping between ontology. And the solution for the data heterogeneity,especially the semantics heterogeneity, is discussed shortly. Thirdly, according to thefunctional components defined in the data exchange model, employing the technology of WebService, define and construct these functional components, which include data access servicecomponent, data extraction service component, data transformation service component anddata loading service component. With these components, data processing in the data exchangeis realized. Combined with the application demand of the data exchange in Daqing OilfieldExploration and Development Institute, every functional component is designed based on theobject oriented technology. And the prototype system is constructed to realize the dataexchange of the two heterogeneous oilfield data model, E&P and EPDM. Through the system,the data exchange model proposed above is validated, which is also shown that the dataexchange model could solve the data exchange problem in the heterogeneous data modeleffectively. These all lay the foundation for the deep semantic research of the data integrationand exchange in future.