Preparation for blocking tight oil and gas perforation hole and preparation method of preparation

• Main Authors: ZHANG HUALI, ZENG JI, HE TINGTING, ZHOU CHANGLIN, TANG BOTAO, FANG HONGMING, LI LI, WANG HANCHENG, PU JUNHONG, YUE HONG
• Format: Patent
• Language: Chinese; English
• Published: 07.12.2021
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PAINTS; POLISHES

The invention discloses a preparation for blocking tight oil and gas perforation holes. The preparation comprises an inner core and a shell with holes. The inner core is a mixture containing a synthetic polymer, sulfonated asphalt and guanidine gum. The shell with the holes is made of soluble metal alloy materials, and the shell with the holes is filled with the mixture. By adopting the preparation for plugging the tight oil and gas perforation hole, the perforation hole of the section can be effectively plugged, and the step of tripping in a bridge plug is omitted when fracturing construction of the next section is carried out. After all fracturing construction operations are completed, the prepared product can be autolyzed in flow-back fluid and discharged to the ground along with the flow-back fluid to play a role in communicating cracks and a shaft, so that the fracturing cost is controlled, the failure of downhole tools is avoided, the fracturing construction time is shortened, and the construction succe