Propping agent, and preparation method therefor and use thereof
By adopting a proppant with a double-layer core-shell structure, the degradable polymer layer is used to show double-sparking characteristics under fracturing conditions, which solves the problem that existing proppants are difficult to disperse in water and easily adsorb pollutants on the surface, and achieves efficient fracturing construction and oil and gas production.
Patent Information
- Application Number
- PCT/CN2023/127372
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-09-18
- Filing Date
- 2023-10-27
- Publication Date
- 2025-03-27
AI Technical Summary
The existing proppant is difficult to disperse in water, resulting in difficulty in pumping and increasing risk of sand blockage during fracturing construction. At the same time, its surface is prone to adsorbing heavy components in crude oil and impurities in water, resulting in an increase in seepage resistance and affecting the oil and gas production effect.
Propants using a bilayer core-shell structure include a proppant core and a double spore modified layer bound to the core surface by chemical bonding, and a degradable polymer layer coated on the surface of the double spore modified layer. The degradable polymer layer is obtained by polymerization of catechol compounds and salt-resistant acrylate monomers, which can rapidly degrade under fracturing conditions and exhibit double-spark characteristics.
The proppant is hydrophilic and easy to disperse on the ground, which is conducive to fracturing construction and is double-sparking on the underground surface, reducing the flow resistance of the fluid in the diversion channel, improving the diversion capacity of the cracks, reducing the risk of sand blockage, and ensuring the normal production of oil and gas.