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CO2 Injection for Enhanced Oil Recovery in Tight Oil Reservoirs （CMG）

CO2 Injection for Enhanced Oil Recovery in Tight Oil Reservo...

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作者： kato audrey roxane 中国石油大学(北京)

学位级别：硕士

There are basically four different techniques to enhance oil recovery and extract30-60%of the stock,rather than the 20-40%recoverable with conventional *** of all,it's possible to inject gases（natural gas,nitrogen,CO）into the well to extend the pressure and,sometimes,reduce the viscosity of the *** injected gases remain trapped within the *** system can therefore combine increased oil recovery and geological storage of *** solutions of diluent or surfactant may also be wont to reduce surface tensions and capillary pressure in oil *** injection of selected microorganisms could be a means of reducing the length of the carbon chains while generating in place surfactants and COwhich reduce the viscosity of the ***,the injection of steam reduces the viscosity and vaporizes a fraction of the *** process to understand the COinjection into a reservoir is an important step COinjection was investigated in the Bakken reservoir,which is rich in tight ***,it is significant to investigate about the potential of applying Enhanced Oil Recovery methods to increase the oil recovery *** we know,it is a subject which is not understood properly in unconventional reservoirs such as the *** that,a compositional simulator called CMG GEM will be ***,the fluid model is built by using CMG Winprop,the components are distributed into 7,with their different compositional data for the Peng-Robinson EOS in the Bakken *** is used to determine the PVT properties,also know the Minimum Miscibility *** after,the result is saving with GEM EOS Model,and will be imported to CMG GEM for the reservoir *** the case,we set up the reservoir with 4 effective hydraulic fractures,after that,the Huff-n-Puff *** total production of the well is 30 ***,the investigation of different parameters such as:fracture width,half-length,injection pressure,injection rate,length of soaking period is liste

关键词： CO2huff-n-puff Enhanced Oil Recovery the Minimum Miscibility Pressure

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