Study Of Prediction Modeling To Sand Production In Oil Well

Sand production in oil wells is one of the important problem in oil exploitation. It costs a lot of manpower and resources for prevention and research each year. Sand production mechanisms as a theoretical basis of the sand prediction, has been highlighted.On the base of massively tests and the theoretical analysis from the predecessor, combining the seepage mechanics, rock mechanics and the flexibility and plasticity mechanics, through the multi-knowledge synthetic study, This article has established for the first time aim at open hole for any well bevel and the azimuth (including random perforation position), and oil well sand production forecast theoretical model for the perforation well completion. It has been confirmed through the example analysis that accuracy and the validity for this article theory and method.On the dynamic models of physical parameters for reservior, this article summarized dynamic mode for sand production forecast, including the porosity, the penetration coefficient and the compressibility coefficient. The model has considered natural parameter influence for the volumetric strain, the framework sand stripped, movable sand in the hole surface and the throat deposition. On the model of critical bottom hole flowing pressure, The paper integrates arith-model of the stress distribution around well wall into the Mohr-Coulumb intensity determination criterion to establish the sand production forecast model - critical bottom hole flowing forecast by combining. The well drilling parameter which needed for establishing the forecast model (well bevel, azimuth) and the formation characteristic parameter has been carried on the discussion analysis. It obtains: The area around the bore hole in eight time of bore holes scopes for the stratum rock is easy to have the shearing destroy, the tension destroy, the extrusion destroyed, as well as its tendency is: The shearing destroy > the tension destroy > extrusion destroy; The actual stress, vertical actual stress is biggest change scope in the wall of a well, and most greatly actual stress >...