Nanoparticle static blasting agent for exploiting shale gas and preparation method of nanoparticle static blasting agent

Abstract

The invention discloses a nanoparticle static blasting agent for exploiting shale gas and relates to the field of shale gas exploitation. The blasting agent is prepared from the following raw materials in parts by weight: 80 to 90 parts of matrix material and 10 to 20 parts of crystal grain binding material, wherein the matrix material is calcium oxide of which the grain size is smaller than 100nm, and the crystal grain binding material is a nano mixed oxide of which the grain size is smaller than 80nm. The method comprises the following steps of A, preparing a mixed raw material; B, mixing: uniformly mixing the matrix material, the crystal grain binding material and a proper amount of water; C, grinding: feeding into a ball mill for grinding to obtain aggregated particles; D, screening: screening to obtain granules with 20 to 30 meshes and high roundness; E, firing: feeding the screened granules into a kiln for firing to obtain the nanoparticle static blasting agent for exploiting the shale gas. The nanoparticle static blasting agent disclosed by the invention has the characteristics of uniform blasting expansibility, short and stable blasting time, high working efficiency, simplicity in construction, safety, environmental protection, good fracture effect, low cost and the like, and is easy for popularization and use.

Description

technical field [0001] The invention relates to the field of shale gas exploitation of unconventional natural gas resources, in particular to a nano particle static blasting agent for shale gas exploitation and a manufacturing method thereof. Background technique [0002] Shale gas is an important unconventional natural gas resource. Its main body is located in dark mud shale or high-carbon mud shale, and it mainly exists in the adsorption or free state and accumulates in shale interlayers. It is not only a potential alternative energy source for conventional energy natural gas, but also a clean and environmentally friendly new energy source. Its main component is methane, and it is a new type of natural gas that will be used on a large scale in the future. Due to the complex origin of shale gas, its storage forms are complex. About 50% of shale gas exists in cracks, pores and other storage spaces, about 50% exists in clay particles and pore surfaces in an adsorbed state, a...

AI Technical Summary

Problems solved by technology

The technical methods disclosed in the invention patents CN102168543B, CNl102877823A and CN103161434A all utilize the principle of blasting to transform oil and gas reservoirs to increase oil and gas recovery. The disadvantage is that the conventional explosive blasting method is used, and there are problems such as poor safety in use.

However, the static blasting agent used in this static blasting and fracturing method is a lime-based or magnesium oxide-based or ettringite-based powdered blasting agent. In actual construction, it is necessary to accurately measure the amount of water to mix the powder. Not only The work efficiency is low, and the heat of hydration generated by the hydration reaction increases the vapor pressure inside the downhole pores, resulting in spout phenomenon, which makes it difficult for water vapor to pass through the filled gaps, resulting in long blasting time, blasting agent greatly affected by temperature, and unstable blasting time. Problems such as uneven blasting expansion force