The Feasibility Study Of CO₂ Foam Fracturing Technology On Daqing Oilfield Qijia Fuyu Reservoir

Daqing Oilfield Qijia Fuyu oil layer is one of the main development target adjustment of the current oil production to succeed, the reservoirs belong to low permeability reservoirs, overplus layers, thin barrier bed, poor reservoir and oil properties, bad oil possibility, the nature of the fluid is complex, In order to improve the single well productivity, gain industrial oil flow, the oil layer must be carried out by fracturing to achieve production goal. A large number of indoor research and field test show that low permeability and water-sensitive reservoir should maximize the reduction of formation damage from the fracturing fluid filtration.CO2 foam fracturing fluid has stronger proppant carrying capacity, low fluid loss, fast and thoroughly flowback, the less formation damage, and other advantages, which is suitable for this kind of reservoir development, the fracturing effect is better than conventional water-based fracturing effect.In this paper, drilling, completion, logging, testing, and some developing dynamic data, carried out on regulating the family Fuyu oil reservoir characteristics of petroleum geology research, analyzes Fuyu oil reservoir characteristics of the field and reservoir characteristics. Through the basic nature of CO2 foam fracturing fluid characteristics and understanding of the basic principles of research and analysis of the mechanism of action and increase CO2 foam fracturing. CO2 bubbling foam is needed to certain conditions, this paper analyzes the specific conditions in the fracturing process, not only in the process of analyzing the temperature field inside the crack, but also analyzes the temperature field within the wellbore, to be able to bubble fracturing a number of factors that affect the establishment of the design and site construction methods and quality control systems CO2 foam fracturing. After a laboratory study and field evaluation preferably a fracturing fluid additives and fracturing fluid formulation designed CO2 foam fracturing Fuyu oil layer in Daqing Oilfield regulating the family to use, and also the scene of the trial, not only deepened the understanding of reservoir, but also achieve the purpose of increasing production.Construction of the scene found that after the introduction of CO2 foam fracturing showed that the process to increase the role and effect of regulating the family Fuyu oil cleanup significant for regulating the family oil provides a successful transformation model, low-permeability oil in Daqing Oilfield effective development of Tibet is of great significance.