Preparation method of self-suspending propping agent

A proppant and curing agent technology, applied in chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of high density and poor suspension of fracturing proppant, reduce fracturing cost, stabilize The effect of good performance and cost reduction
CN109385261AInactive Publication Date: 2019-02-26CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
Publication Date
2019-02-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of exploitation of fluid minerals such as petroleum, natural gas and shale gas, and particularly discloses a preparation method of a self-suspending propping agent, after soaking of the self-suspending propping agent with an organic solvent, the self-suspending propping agent is filtered, a filtered solution is taken for testing, and the content of isocyanate in the solution accounts for 0.1% or more; wherein the preparation method of the self-suspending propping agent comprises the following steps: (1) an aggregate, an inner membrane material and an outer membrane material are prepared, and the outer membrane material comprises outer-layer resin, an outer-layer catalyst and an outer-layer curing agent; (2) the aggregate is heated to 80-160 DEGC, the inner membrane material is added, stirring is performed, wherein the rotating speed of the stirring is 50-100 revolutions per minute; (3) the temperature is reduced to 55-110 DEG C, the outer-layer resin and the outer-layer catalyst are added, stirring is performed, wherein the rotating speed of the stirring is 50-100 revolutions per minute; and (4) the temperature is reduced to 40-90 DEG C, the outer-layer curing agent is added, and stirring is performed, wherein the rotating speed of the stirring is 50-100 revolutions per minute, the temperature is reduced to 30-60 DEG C, and the mixture is discharged out of a pot. The method is mainly used for preparing the self-suspension propping agent, and solves the problem that pure clear water cannot be used as a sand-carrying liquid for fracturing construction.
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Description

technical field

[0001] The invention belongs to the technical field of fluid mineral exploitation such as oil, natural gas and shale gas, and in particular relates to a preparation method of a self-suspending proppant. Background technique

[0002] In order to develop deep oil and gas wells and increase production, hydraulic fracturing technology is widely used. Hydraulic fracturing technology is a technology that uses high-pressure pumps on the ground to continuously inject high-viscosity fracturing fluid into the oil well through the wellbore to form a high pressure in the lower part of the oil well. With the continuous injection of fracturing fluid, the pressure also continues to rise. When the tensile strength and formation stress of the formation rock near the wellbore wall are less than the pressure formed by the fracturing fluid, fractures will occur in the formation near the bottom of the well. When the fracturing fluid carrying proppant continues to be injected, th...

Claims

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