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Novel method for preparing self-suspension ceramsite

A new method and self-suspending technology, applied in chemical instruments and methods, earthwork drilling, drilling composition and other directions, can solve problems such as easy blocking of supporting cracks, etc., and achieve low cost, simple preparation process, and good suspension and dispersibility. Effect

Inactive Publication Date: 2017-01-04
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a new method for preparing self-suspending ceramsite. The prepared self-suspending ceramsite can be suspended and dispersed in clear water, and at the same time, it can solve the problem of existing self-suspending proppants in oil fields. The problem that it is easy to block the support cracks during construction

Method used

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  • Novel method for preparing self-suspension ceramsite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) add xylene, acetone, stearyl alcohol and butyl acetate in the first reactor that agitator and thermometer are equipped with, xylene, acetone, stearyl alcohol and butyl acetate account for 9%, 4% of the total weight of feed intake respectively %, 0.1%, 9%;

[0023] (2) Slowly add dodecyltrimethylsilane, octadecyltrichlorosilane, stearic acid, dodecyltrimethylsilane, octadecyl Trichlorosilane and stearic acid respectively accounted for 0.5%, 0.3%, and 0.3% of the total weight of the feed, and were stirred and reacted at a constant speed at 78-80°C for a period of time to obtain the initial product A;

[0024] (3) Add a certain mass ratio of deionized water, alkylphenol polyoxyethylene ether, Span 60 and ethanol in the second reactor equipped with a stirrer and a thermometer, deionized water, alkylphenol polyoxyethylene ether , Span 60 and ethanol accounted for 66.3%, 0.1%, 0.1%, and 0.3% of the total amount of feed, respectively, and then added the initial product A,...

Embodiment 2

[0028] (1) add xylene, acetone, stearyl alcohol and butyl acetate in the first reactor that agitator and thermometer are equipped with, xylene, acetone, stearyl alcohol and butyl acetate account for 12%, 6% of the total weight of feed intake respectively %, 0.3%, 12%;

[0029] (2) Slowly add dodecyltrimethylsilane, octadecyltrichlorosilane, stearic acid, dodecyltrimethylsilane, octadecyl Trichlorosilane and stearic acid respectively accounted for 0.8%, 0.6%, and 0.6% of the total weight of the feed, and were stirred and reacted at a constant speed at 78-80°C for a period of time to obtain the initial product A;

[0030] (3) Add a certain mass ratio of deionized water, alkylphenol polyoxyethylene ether, Span 60 and ethanol in the second reactor equipped with a stirrer and a thermometer, deionized water, alkylphenol polyoxyethylene ether , Span 60 and ethanol accounted for 53.5%, 0.3%, 0.3%, and 0.6% of the total amount of feed respectively, then added the initial product A, st...

Embodiment 3

[0032] (1) add xylene, acetone, stearyl alcohol and butyl acetate in the first reactor that agitator and thermometer are equipped with, xylene, acetone, stearyl alcohol and butyl acetate account for 11%, 4% of the total weight of feed intake respectively %, 0.2%, 11%;

[0033] (2) Slowly add dodecyltrimethylsilane, octadecyltrichlorosilane, stearic acid, dodecyltrimethylsilane, octadecyl Trichlorosilane and stearic acid respectively accounted for 0.6%, 0.5%, and 0.3% of the total weight of the feed, and were stirred and reacted at a constant speed at 78-80°C for a period of time to obtain the initial product A;

[0034] (3) Add a certain mass ratio of deionized water, alkylphenol polyoxyethylene ether, Span 60 and ethanol in the second reactor equipped with a stirrer and a thermometer, deionized water, alkylphenol polyoxyethylene ether , Span 60 and ethanol accounted for 60.6%, 0.1%, 0.2%, and 0.5% of the total amount of feed, and then added the initial product A, stirred at ...

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Abstract

The invention discloses a novel method for preparing self-suspension ceramsite. The novel method comprises the following steps: (1), xylene, acetone, octadecanol and butyl acetate in a certain mass ratio are added into a first reactor in which a stirrer and a thermometer are loaded; (2), under an ice-bath condition, dodecyl trimethylsilane, octadecyl trichlorosilane and stearic acid are slowly added into a second reactor in which a stirrer and a thermometer are loaded, and stirring for reaction for a period of time at a constant speed is performed under the condition of 78-80 DEG C, so as to obtain a head product A; (3), deionized water, alkylphenol polyoxyethylene, span 60 and ethyl alcohol in a certain mass ratio are added into the second reactor in which the stirrer and the thermometer are loaded, then the head product A is added, stirring for dispersing at a high speed for a period of time is performed, a certain mass of ceramsite is added, the reaction continues for a period of time, and ethyl alcohol is used for washing for two times, and then sample collecting is performed. The ceramsite prepared by adopting the method for preparing self-suspension ceramsite can be dispersed in water in a suspending manner, and as a fracturing propping agent, the ceramsite can ensure that high flow conductivity is kept at cracks and crack blockage are prevented.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to the technical field of oil-water well fracturing proppant, in particular to a new method for preparing self-suspending ceramsite. Background technique [0002] Hydraulic fracturing is one of the key technologies for enhancing oil recovery in low-permeability reservoirs at home and abroad. Hydraulic fracturing refers to squeezing fracturing fluid with a certain viscosity into the well with a displacement far exceeding the maximum liquid absorption capacity of the formation through the high-pressure pump set on the ground, and then suffocating high pressure at the bottom of the well. When this pressure exceeds the fracture pressure of the formation near the well wall and the maximum tensile strength of the surrounding rock, cracks of different sizes will be generated in the formation near the bottom of the well. Continue to squeeze the fracturing fluid carrying proppa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80C09K8/86
CPCC09K8/805C09K8/845C09K8/86
Inventor 左明明袁续周左晓兵陈奠宇周弟宁春花
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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