Numerical Simulation of Multi-Grade Separators for Multi-Phase Fluid Media Down Hole in Offshore Oilfield
It’s an effective method to get higher oil production efficiency during offshore petroleum production by separating some water from produced fluid and re-injecting it in some given formation using down hole separators. However some kinds of oil, water, gas and sand will enter the separator in the down hole separating system as a mixture because of the complex environment down hole. In oilfield onshore multiphase separators will be a good answer to this puzzle. But it becomes almost impossible to use multi-phase separators down hole because of the complex condition and the limitation of diameter of well bore. However multi-grade separators can be arranged in bridge or in series and some path-breaking theoretical and experimental investigation related has been done which based on modular design. This not only gives the answer to the puzzle to arrange multi-grade separators, but also bring it to be possible to separate different separating media with different separator. And this takes role of multiphase separator limited by maximum diameter down hole. Some new results are introduced in this paper about the implement method of separating gas/oil/water in different grade of separators which are arrayed in series. It shows different conditions for down hole separators simulating by CFD technique which can be a perfect reference for design of separators and separating systems.