The Research On Fluid Flow And Heat Transfer Laws For Offshore Pump Well

Electric submersible pump lift shaft is a important part of the system of the offshore, the distributions of pressure and temperature in wellbore are important parameters, they influence the shaft safety, crude oil output and the production cost, they are also indispensable parameters for lift system design. However, China researches for the offshore wellbore, mainly in the pipe flow, while the temperature was almost no research. In addition, the studies focused on mechanics for the marine riser in the marine environment, regardless the influence of ocean conditions on the wellbore heat transfer.Firstly, study the existing wellbore flow and heat transfer analysis model, and then combining the characteristics of offshore oil drilling - the marine environment influence on the marine riser heat transfer, defined appropriate for flow and heat transfer model for this study , and to make the necessary amendments for specific parameters. On this basis, use of C# program language on Microsoft Visual Studio 2008 platform program a software, it has complete function to computer pressure and temperature distribution for marine wellbore. Then use the field data to make further amendments for model and calculation procedure , and analyze the main factors affect the results on this basis.The impact of the marine environment on the relative value of the heat transfer is relatively large. The heating of electric submersible pump and cable has a more significant impact on the temperature field and pressure field distribution, and it has different impact on the difference in pressure distribution by the specific internal difference when Liquid production has different water content or production of gas oil ratio. Considering the Joule-Thomson-Effect or not in the temperature model has more obvious influence on the temperature and pressure results.