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The technology of leak protection and leak control while drilling through physical methods can be successfully applied based on studying the annulus' behaviour of the whole down hole flow field. In this paper, the model of sealing down hole while drilling through physical methods which will be used for CFD simulation is eatablished through reasonable simplification. Then running numerical simulation...
Air drilling is a drilling technology which uses air as the recirculated medium. There are many differences in the pressure distribution of circulatory system, the choice of drilling machinery and the configuration of drilling parameters between air drilling and other conventional drilling technologies. In this paper, we mainly focused on the force analysis and mechanism of rock chip in air drilling,...
In many applications, streamline simulation shows particular advantages over finite-difference simulation. By the advantages of streamline simulation such as its ability to display paths of fluid flow and acceleration factor in simulation, the description of flooding process gets more visibility. The communication between wells and flooding area has been represented appropriately. In low permeability...
In many applications, streamline simulation shows particular advantages over finite-difference simulation. By the advantages of streamline simulation such as its ability to display paths of fluid flow and acceleration factor in simulation, the description of flooding process gets more visibility. The communication between wells and flooding area is represented appropriately. In low permeability reservoirs...
A mathematical model of effective radius for low velocity non-Darcy flow in low permeability composite reservoir with two different zones is established and the threshold pressure gradients of the two zones in low permeability composite reservoir are taken into consideration. The solution of bottomhole pressure is obtained, the type curves of pressure behavior for low velocity non-Darcy flow in composite...
Because accurate measurement of water content in crude oil plays an important role in the extraction and processing of oil, a measurement system of the water content in crude oil which based on LS-SVM is designed in this paper. This design uses LS-SVM algorithm which have a relatively high speed to establish the mathematical model. The coaxial cylinder capacitance sensor is adopted which suitable...
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