Research And Application On Downhole Production Command System Data Model

Downhole production command system is for the leadership in the downhole work branch to globally command and control various production task of entire downhole.To realize scientific command and control to the downhole work business, they must be able to grasp all sorts of key production index information of production links in each team and group anywhere at any time.Based on the analysis of downhole production business, and further research for downhole producing business data, a system construction solution is put forward based on metadata, with system logic structure and architecture of the whole production command taken into consideraton.Through study of metadata and data modeling theory ,as well as analysis of PCEDM, exploration and development database, the arcticle analyzes the data classification of downhole production operations, builds data standards, realizes data coding and constructs production command data model used in the well-repairing and operation business.On the basis of the model, data structure metamodel and multiple theme metamodel of downhole directing production system are designed and built.With metamodel driven design ideas adopted and combined with model driving theory, database theory and metadata theory, a technical idea is rised based on metadata driver object - profession - view (application) - a user (OSVU) to design the theme metamodel of downhole production command system.And the architecture of downhole production command system is designed based on the metamodel,meanwhile it is able to maintain and manage data of the professional database and its structure according to the subject.Data model and the construction of theme metamodel laid a data base for realizing data acquisition, report display, system management and maintenance, and even the production information display ultimately based on WebGIS.It provides real-time, comprehensive production global information and accurate, detailed production information inquiring the specific entity for downhole work branch on-site to command, and provides the omni-directional information support for various director leading production to make scientific decision.This paper makes comparatively detailed discussion of the modeling process. We hope that the research and practice in this paper can provide certain reference for other information system construction.