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Granular material for shale gas development and preparation method thereof

A granular material and shale gas technology, which is applied in the fields of mining fluids, chemical instruments and methods, earthwork drilling and production, etc., can solve the problems that it is difficult to adapt to the high closure pressure of shale gas, the anti-fragmentation ability has not been significantly improved, and the stress cannot be transferred. , to achieve the effect of expanding selection, high compressive strength, and reducing content requirements

Active Publication Date: 2016-11-16
DAQING TIANCHEN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The broken rate of this invention is 6.5% under the pressure of 69MPa, which is difficult to adapt to the high closure pressure of shale gas
[0008]According to the above, through the selection of proppant raw materials, the dependence on bauxite has been reduced, but the anti-fragmentation ability under high closure pressure has not been significantly improved. When the granular proppant is subjected to high shale closure force and temperature changes, the stress cannot be transferred, and it is easy to cause fracture

Method used

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  • Granular material for shale gas development and preparation method thereof
  • Granular material for shale gas development and preparation method thereof
  • Granular material for shale gas development and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] 1) Pre-firing 5 parts by weight of porous nano-diatomite at a low temperature of 600°C for 60 minutes to obtain porous nano-porcelain powder, which has through-hole mesopores and has certain strength and toughness;

[0046] 2) Grind 90 parts by weight of mineral composite powder and 1 part by weight of crystal phase inducer in a jet mill until they are completely sieved through a 1250-mesh sieve, and then mix with the porous nano-porcelain powder obtained in step 1), 1 part by weight Parts of carboxymethyl starch and appropriate amount of water are uniformly mixed in a high-speed mixer, wherein the composite mineral powder is composed according to the following parts by weight: 80 parts of brucite, 10 parts of quartz stone, 8 parts of basalt, and 3 parts of pyrophyllite , 1 part of wollastonite, 2 parts of alunite;

[0047] 3) Send the material obtained in step 2) into a ball mill, add 1% sodium polystyrene sulfonate as the grinding material, and grind for 10-20 minutes...

Embodiment 2

[0053] 1) 4 parts by weight of porous nano-SiO 2 Pre-fired at a low temperature of 500°C for 45 minutes to obtain porous nano-porcelain powder, which has through-hole mesopores and has certain strength and toughness;

[0054] 2) Grind 95 parts by weight of mineral composite powder and 1.5 parts by weight of crystal phase inducer in a jet mill until they are completely sieved through a 1250-mesh sieve, and then mix with the porous nano-porcelain powder obtained in step 1), 1 wt. Parts of polyvinyl acetate and appropriate amount of water are uniformly mixed in a high-speed mixer, wherein the composite mineral powder is composed according to the following parts by weight: 75 parts of brucite, 15 parts of quartz stone, 6 parts of basalt, and 5 parts of pyrophyllite , 2 parts of wollastonite, 1 part of alunite;

[0055] 3) Send the material obtained in step 2) into a ball mill, add 1% polyvinyl sodium sulfate as the grinding material, and grind for 10-20 minutes to obtain agglomer...

Embodiment 3

[0061] 1) 5 parts by weight of porous nano-SiO 2 Pre-fired at a low temperature of 500°C for 45 minutes to obtain porous nano-porcelain powder, which has through-hole mesopores and has certain strength and toughness;

[0062] 2) Grind 90 parts by weight of mineral composite powder and 1.5 parts by weight of crystal phase inducer in a jet mill until they are completely sieved through a 1250-mesh sieve, and then mix with the porous nano-porcelain powder obtained in step 1), 0.5 parts by weight Parts of sodium aluminate and an appropriate amount of water are uniformly mixed in a high-speed mixer, wherein the composite mineral powder is composed according to the following parts by weight: 80 parts of brucite, 10 parts of quartz stone, 5 parts of basalt, 5 parts of pyrophyllite, 2 parts of wollastonite, 1 part of alum stone;

[0063] 3) Put the material obtained in step 2) into a ball mill, add 1% sodium polyacrylate grinding aid to the grinding material, grind for 10-20 minutes t...

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Abstract

The invention provides a granule for exploiting shale gas. The granule consists of 90 to 95 parts of mineral composite powder, 3 to 5 parts of porous nano material, 1 to 1.5 parts of crystal inducer and 0.5 to 1 part of adhesion additive. The preparation method comprises the steps of selecting the porous nano oxide, pre-burning the porous nano oxide at a low temperature to obtain porous nano ceramic powder, and mixing, grinding, binding, clustering, drying and burning the porous nano ceramic powder with the mineral composite powder, the crystal inducer and the adhesion additive to obtain the granule. The granule has the advantage that the mineral composite powder grows by adopting the porous nano ceramic powder as a kernel, uniform and tiny spherical crystal particles are formed under the effect of the crystal inducer, when the granule consisting of the spherical crystal particles is elastically buffered under the situation that the external force exceeds the bond force between every two adjacent crystal particles growing by adopting the porous nano ceramic powder as the kernel, the stress is induced to run through the crystal particle mesopore, so that the granule is not broken under the high closing pressure of shale, and the pressure resistance of the granule can be greatly improved.

Description

technical field [0001] The invention relates to the field of shale gas exploitation, in particular to a granular material for shale gas exploitation, and further relates to a preparation method of the granular material. Background technique [0002] Shale gas is the natural gas that mainly exists in the interlayers of mudstone, high-carbon mudstone, shale and mass rock in an adsorbed or free state. The main component is methane. It is an ideal natural gas resource to replace conventional oil and natural gas. 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 fractures, pores and other storage spaces, about 50% exists in the clay particles and pore surfaces in the adsorbed state, and a very small amount is stored in the interlayer state in the dissolved state. In the siltstone, silty mudstone, argillaceous siltstone. Therefore, the permeability of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/80C09K2208/10
Inventor 陈庆曾军堂
Owner DAQING TIANCHEN TECH DEV
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