A double-layer high-strength fracturing proppant and its preparation method

A fracturing proppant, high-strength technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of weak corrosion resistance, low compressive strength, high fracture rate, etc., to achieve anti-corrosion Strong corrosion resistance, high compressive strength and low breakage rate

Active Publication Date: 2018-12-11
HENAN TIANXIANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a double-layer high-strength fracturing proppant to solve the characteristics of the existing fracturing proppant such as low compressive strength, high crushing rate, high apparent density and weak corrosion resistance

Method used

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  • A double-layer high-strength fracturing proppant and its preparation method
  • A double-layer high-strength fracturing proppant and its preparation method
  • A double-layer high-strength fracturing proppant and its preparation method

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Embodiment 1

[0045] The double-layer high-strength fracturing proppant of this embodiment, such as figure 1 As shown, it includes a ceramic inner core 1 and a silicon nitride ceramic shell 2 coated on the surface of the ceramic inner core 1, and the ratio of the diameter of the ceramic inner core 1 to the thickness of the silicon nitride ceramic shell 2 is 7:1;

[0046] The ceramic inner core is mainly made of the following core materials by mass percentage: 45% of low-bauxite, 45% of shale, and 10% of coal gangue; the mass content of alumina in the low-bauxite is 50%;

[0047] The silicon nitride ceramic shell is mainly made of the following shell materials in mass percentage: 60% of silicon nitride and 40% of high alumina bauxite. The mass content of alumina in the high alumina bauxite is 70%;

[0048] The preparation method of the double-layer high-strength fracturing proppant of this embodiment comprises the following steps:

[0049] 1) Take low bauxite, shale, and coal gangue and cr...

Embodiment 2

[0056] The double-layer high-strength fracturing proppant of this embodiment has the same structure as that of Embodiment 1, including a ceramic inner core 1 and a silicon nitride ceramic shell 2 coated on the surface of the ceramic inner core 1, and the diameter of the ceramic inner core 1 is the same as The thickness ratio of the silicon nitride ceramic shell 2 is 5:1;

[0057] The ceramic inner core is mainly made of the following core materials by mass percentage: 50% of low-bauxite, 45% of shale, and 5% of coal gangue; the mass content of alumina in the low-bauxite is 40%;

[0058] The silicon nitride ceramic shell is mainly made of the following shell materials in mass percentage: 70% of silicon nitride and 30% of high alumina bauxite. The mass content of alumina in the high alumina bauxite is 80%;

[0059] The preparation method of the double-layer high-strength fracturing proppant of this embodiment comprises the following steps:

[0060] 1) Take low bauxite, shale, ...

Embodiment 3

[0066] The double-layer high-strength fracturing proppant of this embodiment has the same structure as that of Embodiment 1, including a ceramic inner core 1 and a silicon nitride ceramic shell 2 coated on the surface of the ceramic inner core 1, and the diameter of the ceramic inner core 1 is the same as The ratio of the thickness of the silicon nitride ceramic shell 2 is 10:1;

[0067] The ceramic inner core is mainly made of the following core materials by mass percentage: 47% of low-bauxite, 43% of shale, and 10% of coal gangue; the mass content of alumina in the low-bauxite is 45%;

[0068] The silicon nitride ceramic shell is mainly made of the following shell materials in mass percentage: 65% of silicon nitride and 35% of high alumina bauxite. The mass content of alumina in the high alumina bauxite is 75%;

[0069] The preparation method of the double-layer high-strength fracturing proppant of this embodiment comprises the following steps:

[0070] 1) Take low bauxite...

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Abstract

The invention discloses a double-layer high-strength fracturing propping agent and a preparing method thereof and belongs to the technical field of oil (gas) extraction auxiliaries. The fracturing propping agent comprises a ceramic inner core and a silicon nitride ceramic shell wrapped on the surface of the ceramic inner core. The proportion of the diameter of the ceramic inner core and the thickness of the silicon nitride ceramic shell is 5-10:1. The ceramic inner core is mainly prepared from, by mass, 40%-50% of bauxite, 40%-50% of shale and 0-10% of gangue. The silicon nitride ceramic shell is mainly prepared from, by mass, 60%-70% of silicon nitride and 30%-40% of bauxite. The double-layer high-strength fracturing propping agent has the advantage of high tensile strength, the low breaking rate, low apparent density, the high corrosion resistance capability and the like, the breaking rate is smaller than 6% under the condition of 103 Mpa, the acid solubility is smaller than 2%, and the double-layer high-strength fracturing propping agent is particularly suitable for development of deep well and ultra-deep well oil and gas fields.

Description

technical field [0001] The invention belongs to the technical field of oil (gas) production aids, and specifically relates to a double-layer high-strength fracturing proppant, and also relates to a preparation method of a double-layer high-strength fracturing proppant. Background technique [0002] In the process of oil and natural gas extraction, hydraulic fracturing has become an important means of extraction. In particular, the storage conditions of oil and natural gas in my country are characterized by deep burial, high closure pressure, and low permeability. Oil and gas are collected from the channel formed by the fracture. At this time, fluid needs to be injected into the rock base to exceed the pressure of the fracture strength of the formation, so that the rock around the wellbore is fractured and a channel with high conductivity is formed. In order to keep fractures open and oil and gas products to be produced to the ground smoothly, petroleum proppant and high-pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 张天成常春丽薛建国刘现伟
Owner HENAN TIANXIANG NEW MATERIALS
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