Study On Measures Of Reservoir Damage And Protection On B Block In Daqing Oilfield

Oil is the "blood" of the industry and a kind of non renewable commodities.It is indispensable strategic resources for national survival and development and plays an important role in safeguarding national economic,social development and national security.With the development of the field,the problem of reservoir pollution is becoming more and more serious.Basing on the basic theory,the B block in Daqing oil field is used as the research object:(1)Basing on the drilling fluid rheology and expansion of physical properties of the experiment,we get the effects of two kinds of drilling fluid on core permeability,determine the reservoir pollution sources of drilling fluids,which provide a basis to solve the problem of reservoir pollution.(2)Basing on the analysis of the composition of the perforating fluid,we get the influence factors of the perforating fluid on the core and we get the influence of perforation fluid on core permeability under different negative pressure conditions.(3)We get the effect of fracturing fluid on the flow conductivity of the reservoir and the influence of the fracturing fluid by the core experiment which is very important to guide the selection of fracturing fluid through the further analysis of the influence of different kinds of fracturing fluid on the conductivity.(4)Basing on the analysis of the theory of pollution source,we diagnose the damage to the reservoir damage source and the method of pollution sources through the determination of indoor experiment,which make a significant role for the oil pollution factors.