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Proppant and preparation method thereof

A technology of proppant and core material, which is applied in the field of hydraulic fracturing, can solve the problem of single function of proppant and achieve the effect of ensuring compressive strength

Pending Publication Date: 2020-09-01
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] This application provides a proppant and its preparation method, which can solve the problem of single function of traditional proppant

Method used

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  • Proppant and preparation method thereof
  • Proppant and preparation method thereof
  • Proppant and preparation method thereof

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preparation example Construction

[0041] figure 2 It is a schematic flow chart of a preparation method of a proppant provided in an embodiment of the present application. as attached figure 2 As shown, the preparation method includes the following steps.

[0042] Step 201: Obtain the core material, and perform cleaning and drying treatment.

[0043] In order to avoid the large volume of the proppant obtained after preparation, when obtaining the core material, the core material with a particle size within the range of 70-140 mesh can be selected. The obtained core material is cleaned to remove the adsorbate on the surface of the core material, and then the cleaned core material is dried to remove residual water droplets on the surface of the core material. Among them, the core material can be ceramsite or quartz sand, so as to ensure the compressive strength of the core material, and the core material can be dried at a temperature of 90-100 degrees Celsius, for example, at a high temperature of 95 degrees...

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Abstract

The invention discloses a proppant and a preparation method thereof, and belongs to the technical field of hydraulic fracturing. The proppant comprises a core material and a capsule material; the capsule material comprises a first wrapping layer, a second wrapping layer and a third wrapping layer which sequentially wrap the core material; thermosetting phenolic resin, used as the first wrapping layer, a hydrophobic polymer used as the second wrapping layer, hydrolyzed polyacrylamide used as the third wrapping layer sequentially coat the core material, so that the proppant can be obtained. As the core material is ceramsite or quartz sand with the particle size of 70-140 meshes, the compressive strength of the proppant is ensured while the volume of the proppant is ensured. Due to the adhesion of the thermosetting phenolic resin, the connection stability between the second wrapping layer and the third wrapping layer which sequentially wrap the core material and the core material is ensured. Due to the anti-scouring characteristic of the hydrophobic polymer and the suspension characteristic of the hydrolyzed polyacrylamide, it is guaranteed that the proppant can suspend in a fracturing fluid, and cracks can be supported for a long time.

Description

technical field [0001] The present application relates to the technical field of hydraulic fracturing, in particular to a proppant and a preparation method thereof. Background technique [0002] In the production process of oil and gas wells and the water injection process of water injection wells, hydraulic fracturing is an important measure for increasing production of oil and gas wells and increasing injection of water injection wells. The specific implementation process of hydraulic fracturing is: under the pressure enough to open the formation to form fractures, squeeze the fracturing fluid into the formation to form fractures, and then use the proppant carried in the fracturing fluid to support the formed fractures, so as to ensure that the formation One or more fractures of varying length, width, and height are formed in the middle to establish a new fluid channel between the formation and the wellbore of the oil and gas well or the wellbore of the water injection wel...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 颜菲都芳兰吴佐浩但佳敏徐建华沈飞于梦红刘彝罗成姚丹丹
Owner PETROCHINA CO LTD
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