Research Of Energy Consumption On Carbon Dioxide Flooding And Applying In Jilin Oilfield

As the oilfield entered the later periods of development,the water cut increased gradually,which resulted in increased production costs.The resources and energy are wasted and the economic benefits of oil field are also seriously affected.With the development of oil field,the conventional water flooding cannot be able to meet the production requirements,and there is a lot of remaining oil in the reservoir after water flooding,which seriously affects the oil production.Based on the researches at home and abroad,this article studies CO₂ flooding.By the means of laboratory experiments and field tests,we take Jilin oilfield as a research object and study several parameters,including properties of produced fluid,components of the associated gas,energy consumption of the gathering system,gas-liquid separation system,metering plant,dewatering equipments and sewage disposal system.The parameters are compared with water flooding,and show its displacement advantages.The CO₂ flooding can not only increase the oil recovery,but also reduce the content of carbon dioxide in the air,which helps to reduce the greenhouse effect and slow down the global warming.The use of carbon dioxide can reduce the costs of carbon dioxide treatment and make contributions to the global environment.It is a mature technology to inject CO₂ into the oil field to improve oil recovery.At the same time,it can realize the underground storage of CO₂.But the injection of carbon dioxide will cause greatly change of the produced fluid properties.It will affect the viscosity,freezing point,density and content of active components,which leads to the change of fluid flow properties.Therefore,in order to study the law of its change,it is necessary to classify the carbon dioxide flooding produced liquid.Based on the Jilin oilfield carbon dioxide flooding fluid gathering system and carbon dioxide recycling system,we study the carbon dioxide flooding.Compare the efficiency of gathering system and recycling system,which includes the property of CO₂ flooding fluid components change,change law of variation.Compare with the water flooding and determine the applicability of CO₂ flooding.