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- W2375832013 abstract "The regularity of threshold pressure gradient and water injection pressure were investigated on low-permeability reservoir(≤23×10-3 μm2) through core flooding experiment in Baolang oilfield with reservoir temperature 90℃ and pressure 23 MPa.The results showed that the threshold pressure and threshold pressure gradient decreased with increasing permeability which might be divided into 3 regions,such as the sudden letdown region,letdown region and basic balanced region.The threshold pressure gradient decreased rapidly from 10.77 MPa/m to 5.64 MPa/m with increasing permeability which was of 0.176×10-3—0.23×10-3 μm2.The irrigation became difficult when the threshold pressure gradient was very high.The injection pressure gradient and breakthrough pressure gradient reduced with increasing permeability which might be divided into 3 regions,such as the gentle letdown region,sudden letdown region and basic balanced region.At the same time,water cut that breakthrough pressure point corresponding increased gradually to 100%.The core water cut achieved 90% very quickly in flooding,while injection pressure gradient increased with increasing injection volume.It was different from general reservoir irrigation which injection pressure gradient was stable or decline at high water cut stage.The water injection well stimulation was the important and highly effective method to develop Baolang oilfield." @default.
- W2375832013 created "2016-06-24" @default.
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- W2375832013 date "2011-01-01" @default.
- W2375832013 modified "2023-09-23" @default.
- W2375832013 title "Regularity and Characteristics of Injection Pressure for Low Permeability Reservoir in Baolang Oilfield" @default.
- W2375832013 hasPublicationYear "2011" @default.
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