Nanyishan Oil Field Study For Predicting Method Of Production And Surplus Oil Saturation In Low-porosity And Low-permeability Oil Reservoir

Predicting production of the oil reservoir and regulation of the surplus oildistribution not only is foundation for drawing up development project, but alsois reason for drawing up developments to adjust the project. In recent years,soar along with the oil price, development of low porosity and low permeabilityoil reservoir have become a part of importance in oil reservoir development.The well production in low porosity and low permeability oil reservoir has towcharacteristics: it is high at early period and its decreasing speed is quick.The characteristics affect greatly prediction of production. Therefore,accurate predicting production of this type of reservoir, supervising the wholeprocess of the oil reservoir development, insuring the oil reservoir developmentto have the most reasonable development project and developments to adjust theproject, making the oil reservoir development to have the best economicperformance is the emphasis of oil reservoir development. In this paper,collecting geology, logging, oil reservoir engineering and indoor experimentin together, based on the oil-field basic geology data and results of loggingexplanation, reservoir geology characteristics are finely described. On the base,synthesizing the dynamic state data and Static state date, this paper gives amethod that predicts oil reservoir production and surplus oil saturation. Themethod includes as follows several contentses:1,Synthesizing static date, oil testing, well testing and production testing,this paper gives a new method that predicts well production at early period ofwell producing.2,Based on B-function in mathematics, a new mathematic model that predictsoil reservoir production is deduced in this paper. The mathematics' model isthe summary and the development to that predicts the model that people of thepast put forward.3,combining static date with dynamic data, the predicting model in this papercan predict unit layer production. It is the foundation that evaluates finelyoil-field development effect.4,Combining the theory of non-piston linear water driving oil with the modelof predicting production, a predicting model of surplus oil saturation is gavein this paper. The model has the characteristics of High accuracy and highresolution.As an example, this paper describes finely reservoir geology characteristicsof â…¢+â…£ oil group Nayishan oil-field from as follows several point: sediment,porosity and permeability, bearing-oil and non-uniform. On the basis, the wellproduction and the surplus oil saturation of â…¢+â…£ oil group Nayishan oil-fieldis predicted by the model in this paper. The result indicates that now well-netof â…¢+â…£ oil group Nayishan oil-field is not reasonable. Finally, analyzingprediction result of the model in this paper, the adjustment well-net of â…¢+â…£oil group Nayishan oil-field is gave.