Optimization Of Borehole Viscosity Reducing Method While Offshore Heavy Oil Lifting

In the process of offshore heavy oil lifting,heavy oil with high viscosity and bad rheological property is difficult to flow even to be lifted to the well head,affect the high development of heavy oil.The original text is based on at home and abroad,By the analyze of well bore heat transfer,aiming to the feature of offshore oil lifting,and summary the regular pattern of well bore temperature field.According to a serious of adaptation,collation,and consummate,establish a model of heavy oil lifting temperature field.Based on the temperature field,aiming to the pump efficiency,lifting efficiency,The original text compile technology parameter optimization software of offshore heavy oil lifting.The software calculate the wellbore temperature distribution curve,coming to the temperature section,and calculate the feasible electric heating equipment's landing depth.According to the analyse of heavy oil lifting technology and fitness,evaluate the pros and cons,applicability lifting technology.Optimize offshore heavy oil lifting string and lifting method combining the character of Bohai heavy oil.Finally obtain a high efficiency wellbore viscosity breaking technology,which provide a technology support,making preferable effect in in Bohai.and acquire preferable effect according application in Lvda,Penglai block in Bo Hai offshore.