Porous petroleum fracturing propping agent and preparation method thereof

Abstract

The invention provides a porous petroleum fracturing propping agent and a preparation method thereof, and belongs to the technical field of oil-gas well fracturing in oil exploitation. The porous petroleum fracturing propping agent is prepared from bauxite fine powder, bentonite, manganese powder, silicon carbide fine powder, kyanite fine powder and activated alumina fine powder. Compared with an existing medium-density petroleum fracturing propping agent, the porous petroleum fracturing propping agent has the advantages that particles of the roasted propping agent have more opening pores by adopting silicon carbide as a pore forming agent, more scale inhibitors can be accommodated in the propping agent since the porous structure is capable of providing a space structure to portability of the scale inhibitors, and generation of well scale is prevented or reduced by means of slow release of the scale inhibitors after the propping agent and fracturing fluid are pumped into the well by high pressure. Furthermore, the porous petroleum propping agent has a rather low volume density, and the low-density propping agent can be used for overcoming the defect that the fracturing fluid and the propping agent are blocked to flow deep to the rock crack since a high-density propping agent easily forms moundy accumulation at the port of the rock crack, so that the yield of an oil-gas field can be increased.

Description

technical field [0001] The invention relates to a fracturing proppant used in the field of petroleum exploitation, in particular to a porous petroleum fracturing proppant and a preparation method thereof. Background technique [0002] As we all know, petroleum is the blood of industry and is indispensable in people's life and industrial development. However, with the development of the oil extraction industry, most of the remaining oil fields are low permeability and high closure pressure oil fields. In order to improve the production efficiency of oil fields, hydraulic fracturing technology is widely used at home and abroad. This technology is to create cracks in the rock formations under the oil and gas wells through fracturing operations. At the same time, the petroleum proppant and fracturing fluid are evenly mixed and pumped into the rock formation cracks under high pressure, which plays a role in supporting rock fractures and balancing the closing pressure of the rock...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of short transportation distance of medium and high density petroleum proppants in rock fractures, high performance requirements for fracturing fluid and fracturing equipment, and Louis scaling of oil well pipes, the invention provides a porous petroleum fracturing proppant In the preparation method thereof, silicon carbide is used as a pore-forming agent to generate more open pores in the proppant, which can carry the scale inhibitor; the mullite reaction of kyanite and its accompanying large expansion effect are used, and Combined with the pore-forming effect of silicon carbide to maintain low density; at the same time, activated alumina is used to control the ratio of aluminum to silicon in the raw material, so that as much mullite phase as possible can be generated in the proppant, and the strength of the proppant can be improved to ensure that the proppant can work normally. Applied in oil wells with low permeability and high closure pressure, the resulting proppant has the characteristics of low density, high water absorption and medium strength