Method for performing thick oil huff-puff cold recovery by using bio-nano materials

• Main Authors: ZHANG SONGHONG, YUN JUNXIAN, LOU XIAOLING, TAN JIANFENG
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• Subjects: 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

The invention discloses a method for performing thick oil huff-puff cold recovery by using bio-nano materials. The method comprises the following steps of: respectively preparing bio-nano slug liquids by using different bio-nano materials to form combined slugs, wherein the combined slugs are at least two of BioNanoEM bio-nano materials of A series, F series, L series and J series, and respectively stirring or stirring after diluting with water to form different bio-nano slug liquids; and during oil displacement treatment, sequentially injecting the different bio-nano slug liquids into an oil-containing porous medium according to the sequence, promoting seepage of an oil phase in pores, then performing water-phase oil displacement, pushing the bio-nano slug liquids to go deep into the oil-containing porous medium, expanding the sweep range of the bio-nano slug liquids, enabling the oil phase to flow out of the porous medium along with bio-nano emulsion for extraction and recovery, and realizing oil phase yiel