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

A fracturing fluid and self-crosslinking technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem that one dose of fracturing fluid cannot be used for multiple purposes, and achieve fast dissolution time, easy use, and good fracturing The effect of milk performance

Active Publication Date: 2021-07-06
FRACTURING COMPANY OF CNPC GREATWALL DRILLING +1
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  • Summary
  • 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 and liquid preparation method of integrated self-crosslinking thickener modified polymer for fracturing
  • Preparation and liquid preparation method of integrated self-crosslinking thickener modified polymer for fracturing
  • Preparation and liquid preparation method of integrated self-crosslinking thickener modified polymer for fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1, preparation of a fracturing liquid emulsion

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

[0043] Table 1

[0044] name Quality (g) Acrylamide 210 Sodium acrylate 98 AMPS sodium salt 70 N, N'-dibadone propionlamide ethylenediamine 35 Sperm Appropriate amount Deionized water 987 Molecular weight regulator (quality ratio of sodium formate: urea = 1: 3) 500mg Ion agent 5000mg

[0045] The oil phase feedstock of the fracturing liquid emulsion stock solution is shown in Table 2.

[0046] Table 2

[0047] name Quality (g) No. 10 white oil 510 Span80 60 Tween 60 30

[0048] The feedstock of the oil phase and the aqueous phase is weighed according to the raw materials of Table 1 and Table 2, and the oil phase and the aqueous phase are prepared; mixed with a proportion of the oil phase and the aqueous phase of 3: 7 to th...

Embodiment 2

[0052] Example 2, preparation of a fracturing liquid emulsion

[0053] The hydraulic raw material of the fracturing liquid emulsion stock solution is formulated in Table 4.

[0054] Table 4

[0055]

[0056]

[0057]The oil phase feedstock of the fracturing fluid emulsion stock solution is shown in Table 5.

[0058] table 5

[0059] name Quality (g) No. 10 white oil 510 Span80 60 Tween 60 30

[0060] The feedstock of the oil phase and the aqueous phase is weighed according to the raw material of Table 4 and Table 5, and the oil phase and the aqueous phase are prepared; mixed with a proportion of the oil phase and the aqueous phase of 3: 7 to the viscosity 1000-1200 MPa.s, respectively. After at least 30 minutes of nitrogen passing into a purity of 99.99%, the system temperature drops to 10 ° C, and the composite initiator is ammonium sulfate and sodium bisulfite, and the control reaction temperature does not exceed 40 ° C until the reaction is comp...

Embodiment 3

[0064] Example 3, preparation of a fracturing liquid emulsion

[0065] The hydraulic raw material composition of the fracturing liquid emulsion stock solution is shown in Table 7.

[0066] Table 7

[0067] name Quality (g) Acrylamide 252 Sodium acrylate 112 AMPS sodium salt 126 N, N'-dibadone propionlamide ethylenediamine 42 Sperm Appropriate amount Deionized water 868 Molecular weight regulator (quality ratio of sodium formate: urea = 1: 3) 500mg Ion agent 5000mg

[0068] The oil phase feedstock of the fracturing liquid emulsion stock solution is formulated as follows 8.

[0069] Table 8

[0070] name Quality (g) No. 10 white oil 510 Span80 60 Tween 60 30

[0071] The raw materials of the oil phase and the aqueous phase are weighed according to the raw materials of Table 7 and Table 8, and the oil phase and the aqueous phase are prepared; mixed with a proportion of the oil phase and the aqueous pha...

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Abstract

The present invention relates to the field of fracturing fluid for oil and gas field reconstruction, in particular to a fracturing fluid emulsion stock solution and its preparation method, slick water and suspended sand fracturing fluid. The purpose of the present invention is to provide a multi-purpose fracturing fluid emulsion stock solution, It can be used to prepare slick water and suspended sand fracturing fluid. The original solution of fracturing fluid emulsion is mainly made by polymerization reaction of oil phase and water phase; the preparation method includes: adding molecular weight modifier and metal ion removal agent to the water phase, and adjusting the pH value of the water phase to be weakly acidic; Mix and stir with the oil phase until the viscosity of the mixed phase is 1000-1200mPa.s, protect with nitrogen, cool down to below 10°C, add an initiator, control the reaction temperature not to exceed 40°C, after the reaction is completed, cool to room temperature to obtain a fracturing fluid Emulsion stock solution. The mass fraction of the fracturing fluid emulsion stock solution in the slick water is 0.06-0.12%; the mass fraction of the fracturing fluid emulsion stock solution in the suspended sand fracturing fluid is 1-2%.

Description

Technical field [0001] The present invention relates to the field of oil and gas field transformation fracturing fluid, and more particularly to the preparation of integrated self-crosslinking agent modified polymers for fracturing. Background technique [0002] The fracturing fluid refers to a non-homogeneous unstable chemical system formed by a plurality of additives, which is a working fluid that is used in fracturing the oil and gas layer. Its main function is to transmit high-pressure transmission formed by the ground equipment. In the formation, the formation is broken to form a crack and transport the proppant along the cradle. [0003] In the ground, the high-voltage large displacement pump is used, and the fracturing fluid is injected in the oil layer with the pressure greater than the absorbent capacity of the oil layer, and the pressure in the wellbore is gradually increased, thereby placing high pressure in the bottom well. When this pressure is greater than the groun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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