Design And Realization Of Daqing Oilfield Downhole Data Collection

Job of downhole is primary business in DOWNHOLE SERVICE SUB-COMPANYDAQING OILFIELD COMPANY, which envoles multi-diciplines, multi-specialities,there are not only many kinds of business, but also more business. At present, data ofjob of downhole is stored in very application system respectilvely, each applicationsystem is responsible of data acquisition themselves, which will result in the same datais acquisited and stored at different location, it is much easy to cause data inconsistency,and the data quality is not controlled, let alone, these data is shared. In Addtion, forthese application systems, in order to implement data acquisition, the concretacquisition application system must be designed and developed, these acquisitionsoftware will cost lots, still, these acquisition application systems have littleexpansibility. So far, data acquisition functions are seperated from concrete applicationststems internationally, According to international custom, according to downholebusiness requirements, the business of job of downhole is researched, a unified datamodel is contructed based on EPDM specifications, the data acquisition specificationsare formulated, in order to control data quality, many data constraint rules are created,and finally, based on metadata driven technique, a flexible common data acquisitionsoftware system is developed.Below these issues are importantly researched.Firstly, based on information planning theory and technique, data flow for job ofdonwhole is researched, common data and prefesional data are extracted respectively,according to EPDM specification, a unified data model for job of donwhole iscontructed, and data item constraint rules are defined.Secondly, in order to standardize data acquisition procedure, data acquisitionspecification of job of downhole is formulated, which require that data source isresponsible of data acquisiting and data quqlity controlling, the data acquisitionspecification sovels data repeatly acquisited.Below these issues are researched in the thesis.Thirdly, a metadata layer is created, which loates professional data and acquisitionsystem, including data dictionary metadata, authority metadata and acquisition interfacemetadata and so on. By means of these metada, it can implement data acquisition interface customed flexibly and define data quality contraint rules.Fourthly, Employing metadta, it can define data flexibly views and authorize to theusers, which can ensure uniquely data acquisition source.And finally, in order to satisfy user query, a query and data downloading system isdesigned and developed, which solves data query and data shares.The common data acquisition function and other function is implemented, theseresults have beed applied in DOWNHOLE SERVICE SUB-COMPANY, and more than30thousands wells’ data has been acquisited into the data center. The software systemcan be authorized to the concrete uers, which ensure data uniqueness, consistency, andstandardized architecture of data management, enhancing the data mangement level,these data can provie data minning and dicision supporing.