4results about How to "Improve flowback rate" patented technology

This invention relates to the field of slickwater technology, specifically to a high-efficiency proppant-carrying slickwater. It comprises a shear-responsive smart thickener and inorganic salts dispersed in an aqueous phase; the smart thickener is composed of ABA-type temperature-ion dual-responsive block copolymers and nano-silica particles with surface-grafted hydrophobic alkyl chains and cationic groups. The slickwater of this invention exhibits ultra-low viscosity and high drag reduction during the pumping stage (low temperature, high shear); upon entering a fracture, the synergistic effect of temperature rise and instantaneous high-speed shear triggers hydrophobic association of the copolymer and interweaving of the nanoparticles, forming a three-dimensional network structure; under the low-shear environment within the fracture, the network structure self-reinforces through ordered reconstruction of ion pairs, achieving high-viscosity proppant carrying. Its core lies in transforming the inherent temperature rise and shear effects of the process into a driving force for constructing a proppant-carrying network, thereby effectively resolving the contradiction between low-friction pumping and high proppant carrying capacity in slickwater volumetric fracturing and significantly reducing reservoir damage.

The invention discloses an interface wetting regulator for tight gas reservoir water control fracturing and a preparation method of the interface wetting regulator. The preparation method comprises the following steps: S100, carrying out acidolysis on cellulose; s200, carrying out a hydrothermal reaction on the cellulose acidolysis product and a Gemini surfactant; and S300, compounding a quaternary ammonium salt cationic surfactant with a product obtained in the step S200 to obtain the interface wetting regulator for water control fracturing of the high-temperature and high-salt tight gas reservoir. The interface wetting regulator for water control fracturing of the high-temperature and high-salt tight gas reservoir, prepared by the preparation method provided by the invention, has multiple adsorption sites and high surface performance, is stronger in adsorption on the rock surface, has good wetting performance, and can convert a hydrophilic surface into a neutral wetting state and reduce the water phase permeability. Meanwhile, the surface tension is low, the flowback rate of fracturing fluid can be increased, and water control fracturing yield increase of tight gas reservoirs is achieved.

The present application provides a kind of coal bed gas U-shaped well straight well fast blowout method and device, the present application is by using soluble bridge plug fracturing and straight well blowout method, realizes first fracturing section first blowout, improves fracturing fluid flowback rate, reduces reservoir water sensitivity effect;The present application utilizes the height difference of landing point and docking point, further improves the ability of flowback fluid to carry solid residues in wellbore;The present application designs a storage tube, and the large particle residues that are difficult to carry to the ground during blowout are deposited in the storage tube, and after blowout is finished, it is fished to the ground by fishing tool, which realizes the purpose of fast blowout and wellbore cleaning.

The present application relates to the technical field of hydraulic fracturing method, and is an alternating pulse injection method for promoting proppant grouping, which comprises uniformly stirring A agent with proppant and injecting into the formation, and B agent is a slow-release promoter which is injected into the formation together with fracturing fluid in the preflush and mid-top fluid stage. The alternating pulse injection method for promoting proppant grouping can improve single well production by 20% to 90%, eliminates the loss of flow conductivity caused by residue blockage and proppant embedding, thereby reducing the pressure drop funnel effect near the wellbore and improving the fracturing reconstruction effect; and a centimeter-level high-flow channel is established, which greatly improves the flowback rate and flowback speed and reduces the risk of sand plugging during construction.