Oil and gas field environment-friendly fracturing propping agent and preparation method thereof

Abstract

The invention relates to an oil and gas field environment-friendly fracturing propping agent prepared by well drilling solid waste and a preparation method thereof; the oil and gas field environment-friendly fracturing propping agent adopts the well drilling solid waste as a raw material, and comprises, by the weight percentage, 20%-60% of the well drilling solid waste, 3%-7% of sand, 1%-5% of ironmaking waste slag, 5%-8% of portland cement, 6%-10% of sulphoaluminate cement, 5%-10% of a curing agent, 2%-3% of manganese dioxide, 4%-6% of sodium sulfate, 2%-5% of barium carbonate, 5%-8% of water-swelling rubber particles, 0.5%-1% of an excitation agent, 0.4%-0.8% of a reinforcing agent, 0.2%-0.5% of a defoaming agent, 0.1%-0.5% of a water reducing agent, 0.3%-0.6% of an impregnating agent, and 1.2%-1.5% of sodium methyl cellulose. The oil and gas field environment-friendly fracturing propping agent provided by the invention has the advantages of good compressive strength, strong crush resistant capability, small density and low production cost; the well drilling solid waste can be fully utilized, the waste is turned into treasure, the environment is protected, and the resources are saved.

Description

Technical field [0001] The invention belongs to the field of materials, and particularly relates to a petroleum fracturing proppant and a preparation method thereof. Background technique [0002] In the process of oil and gas exploitation, oil fracturing proppant is a high-strength particle support that keeps the cracks in the deep stratum in a cracked state. Its function is to support the two walls of the cracked crack. Even if high-pressure pumping is stopped, the bottom of the well When the pressure drops below the closing pressure of the rock formation, the cracks leading to each oil and gas eye in the formation remain open, which can greatly improve the permeability of the oil and gas layer and increase the production of oil and gas fields. [0003] At present, there are three main types of proppants: quartz sand, resin-coated sand, and fired ceramsite. However, quartz sand has low strength, and the fragments after rupture will block the cracks, reduce the conductivity, and ca...

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly three types of proppants: quartz sand, resin-coated sand, and fired ceramsite. However, quartz sand cannot meet the requirements of deep well mining because of its low strength and broken debris that will block cracks and reduce conductivity; Resin-wrapped peritoneal sand solves the problem of low strength of quartz sand, but the production cost is high and the process is complicated; ceramsite fracturing proppant is generally made of bauxite as raw material, with various auxiliary materials, granulated and sintered in a rotary kiln , sintered bauxite and sintered zirconia ceramsite proppants have high strength and good chemical stability, and have been widely used in more and more oil fields, but their high density is easy to cause damage to fracturing equipment, and bauxite It is a relatively precious mineral resource in the country, and the mining volume of high-grade bauxite is limited