The Well Test Curve Drawing Research Under The Web Environment

Well test analysis and its curve fitting pay a important role in the rapid development of oilfield digitization. The paper research the well test curve plotting and display on the web, which focus on two aspects.On the one hand, the moving least-square method is used for curve fitting of well test data instead of the least squares fitting method. Compared with the moving least-square method, the moving least squares method mainly has two major improvements:one is the establishment of the fitting function more convenient; another is moving least squares method that introduces the concept of tight branch, the choice of weighting function can affect the smoothness of the fitted curve in the process of fitting and adopts different order basis function can obtain different accuracy.On the other hand, the system software architecture design adopts multi-layer B/S structure. ExtJS framework and ActiveX technology are used to realize presentation layer, ActiveX technology is mainly to make the GeotoolKit secondary development image rendering module of well test curve that can be ran under the environment of the browser. The well test image rendering modules only are responsible for image display and through Ajax technology read data from the background reduces the coupling of display layer and logical layer, improves the reusability of image rendering module. Logical layer adopts J2EE three frameworks SSH (Struts2+Spring+Hibernate) to build, the logic layer is subdivided into Dao layer, Service layer and Struts. The Dao layer is responsible for getting data interacted with the database, the Service layer is responsible for handling the whole business process, Struts layer as a front controller is responsible for the data interaction with the front desk. Using this design improves the maintainability and scalability of the background. The data layer uses Oracle database for data storage.The test shows that the research of well test curve drawing system that based on Web can fulfill the function of well test analysis under the Web environment, Enables users efficiently well test analysis directly through browser.