Method for oil displacement using carbon dioxide and foam

The invention discloses a method for oil displacement using carbon dioxide and foam. The method can be applied to low-permeability high-mineralization stratums, carbon dioxide and an aqueous solution containing a foaming agent are alternately injected to raise the efficiency of oil displacement, the...

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Bibliographische Detailangaben
Hauptverfasser:	HAN CHANGXI, LIU ZHE, ZHAO JIANSHE, ZHANG RONGLAN, DING QIJIE
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Beschreibung
Zusammenfassung:	The invention discloses a method for oil displacement using carbon dioxide and foam. The method can be applied to low-permeability high-mineralization stratums, carbon dioxide and an aqueous solution containing a foaming agent are alternately injected to raise the efficiency of oil displacement, the low permeability means that the permeability is within the range of 1 to 10 mD, and the high mineralization means that the mineralization is less than 100 g/L. The method for oil displacement using carbon dioxide and foam is easy to operate, oil displacement using carbon dioxide and oil displacement using foam are combined, defects of oil displacement using a single material can be overcome, and the efficiency of oil displacement in low-permeability high-mineralization stratums can be distinctly raised.