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Preparation method and liquid preparation method of integrated self-crosslinking thickening agent modified polymer for fracturing

A fracturing fluid and self-crosslinking technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem that fracturing fluid cannot be used for one agent, and achieve fast dissolution time, simple preparation method, and convenience. effect used

Active Publication Date: 2020-10-13
FRACTURING COMPANY OF CNPC GREATWALL DRILLING +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve or improve the above-mentioned problems existing in the prior art, the object of the present invention is to provide a kind of fracturing fluid emulsion stock solution, slick water and suspended sand fracturing fluid and its preparation method, so as to solve the problem that the existing fracturing fluid cannot realize multiple functions in one dose The slick water and suspended sand fracturing fluid made from this fracturing fluid emulsion can realize self-crosslinking without additives when used, and can realize continuous dosing without pre-dosing
[0009] In order to solve the technical problem that the existing fracturing fluid cannot be used for multiple purposes, the technical solution adopted in the embodiment of the present invention is:

Method used

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  • Preparation method and liquid preparation method of integrated self-crosslinking thickening agent modified polymer for fracturing
  • Preparation method and liquid preparation method of integrated self-crosslinking thickening agent modified polymer for fracturing
  • Preparation method and liquid preparation method of integrated self-crosslinking thickening agent modified polymer for fracturing

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Experimental program
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Effect test

Embodiment 1

[0041] Embodiment 1, the preparation of fracturing fluid emulsion stoste

[0042] The composition of the water phase raw material of the fracturing fluid emulsion stock solution is shown in Table 1 below.

[0043] Table 1

[0044] name mass (g) Acrylamide 210 sodium acrylate 98 AMPS sodium salt 70 N,N'-Diacetonepropionamidoethylenediamine 35 caustic soda Appropriate amount Deionized water 987 Molecular weight regulator (mass ratio sodium formate: urea = 1:3) 500mg In addition to metal ion agent 5000mg

[0045] The oil phase raw material composition of the fracturing fluid emulsion stock solution is shown in Table 2 below.

[0046] Table 2

[0047] name mass (g) No. 10 white oil 510 span80 60 Tween 60 30

[0048] Weigh the raw materials of oil phase and water phase according to the raw materials in Table 1 and Table 2 respectively to prepare oil phase and water phase; mix and...

Embodiment 2

[0052] Embodiment 2, the preparation of fracturing fluid emulsion stoste

[0053] The composition of the aqueous phase raw material of the fracturing fluid emulsion stock solution is shown in Table 4 below.

[0054] Table 4

[0055]

[0056]

[0057]The oil phase raw material composition of the fracturing fluid emulsion stock solution is shown in Table 5 below.

[0058] table 5

[0059] name mass (g) No. 10 white oil 510 span80 60 Tween 60 30

[0060] Weigh the raw materials of the oil phase and the water phase according to the raw materials in Table 4 and Table 5 respectively, and prepare the oil phase and the water phase; mix and stir according to the mass ratio of the oil phase and the water phase at a ratio of 3:7 until the viscosity is 1000-1200mPa.s After feeding nitrogen with a purity of 99.99% for at least 30 minutes, lower the system temperature to 10°C, start adding composite initiators ammonium persulfate and sodium bisulfi...

Embodiment 3

[0064] Embodiment 3, the preparation of fracturing fluid emulsion stoste

[0065] The composition of the water phase raw material of the fracturing fluid emulsion stock solution is shown in Table 7 below.

[0066] Table 7

[0067] name mass (g) Acrylamide 252 sodium acrylate 112 AMPS sodium salt 126 N,N'-Diacetonepropionamidoethylenediamine 42 caustic soda Appropriate amount Deionized water 868 Molecular weight regulator (mass ratio sodium formate: urea = 1:3) 500mg In addition to metal ion agent 5000mg

[0068] The oil phase raw material composition of the fracturing fluid emulsion stock solution is shown in Table 8 below.

[0069] Table 8

[0070] name mass (g) No. 10 white oil 510 span80 60 Tween 60 30

[0071] Weigh the raw materials of the oil phase and the water phase according to the raw materials in Table 7 and Table 8 respectively, and prepare the oil phase and the ...

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Abstract

The invention relates to the field of fracturing fluids for oil and gas field transformation, and especially relates to a fracturing fluid emulsion stock solution, a preparation method thereof, a slickwater and a suspended sand fracturing fluid, and aims to provide a multi-purpose fracturing fluid emulsion stock solution. The stock solution can be used for preparing the slickwater and the suspended sand fracturing fluid. The fracturing fluid emulsion stock solution is mainly prepared from an oil phase and a water phase through a polymerization reaction. The preparation method comprises the following steps: adding a molecular weight regulator and a metal ion removing agent into the water phase, and regulating the water phase to be weakly acidic; mixing and stirring the water phase with theoil phase until the viscosity of the mixed phase is 1000-1200 mPa.S, cooling to below 10 DEG C under the protection of nitrogen, adding an initiator, controlling the reaction temperature not to exceed40 DEG C, finishing the reaction, and cooling to room temperature to obtain the fracturing fluid emulsion stock solution. The mass fraction of the fracturing fluid emulsion stock solution in the slickwater is 0.06-0.12%; and the mass fraction of the fracturing fluid emulsion stock solution in the suspended sand fracturing fluid is 1-2%.

Description

technical field [0001] The invention relates to the field of fracturing fluid for oil and gas field reconstruction, in particular to a method for preparing and preparing a modified polymer with an integrated self-crosslinking thickener for fracturing. Background technique [0002] Fracturing fluid refers to a heterogeneous and unstable chemical system formed by various additives in a certain ratio. It is a working fluid used in fracturing oil and gas reservoirs. Its main function is to transmit the high pressure formed by ground equipment. into the formation, fractures the formation to form fractures and transports proppant along the fractures. [0003] A high-pressure and large-displacement pump is used on the ground, and the principle of liquid pressure transmission is used to inject the fracturing fluid into the oil layer at a pressure greater than the absorption capacity of the oil layer, and gradually increase the pressure in the wellbore, thereby suppressing the high p...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/88C08F220/56C08F220/06C08F220/58
CPCC08F220/56C09K8/68C09K8/882C08F220/06C08F220/585
Inventor 刘福建贾振福辛勇亮邹旭辉王立祥王愉刘挺秦鹏张磊屈川曹会
Owner FRACTURING COMPANY OF CNPC GREATWALL DRILLING
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