Raw solution of fracturing fluid, acidified fracturing fluid, water-resistance-reducing and sand-carrying fracturing fluid and its preparation method

A fracturing fluid and raw fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of complicated construction and the inability of one agent to use multiple fracturing fluids.

Active Publication Date: 2021-06-04
FRACTURING COMPANY OF CNPC GREATWALL DRILLING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve or improve the above-mentioned problems in the prior art, the object of the present invention is to provide a fracturing fluid stock solution, acidified fracturing fluid, water resistance reducing and sand-carrying fracturing fluid and a preparation method to solve the problem of existing fracturing fluid. Problems of dosing in advance, adding demulsifier, needing cross-linking agent and complicated construction
[0007] 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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  • Raw solution of fracturing fluid, acidified fracturing fluid, water-resistance-reducing and sand-carrying fracturing fluid and its preparation method
  • Raw solution of fracturing fluid, acidified fracturing fluid, water-resistance-reducing and sand-carrying fracturing fluid and its preparation method
  • Raw solution of fracturing fluid, acidified fracturing fluid, water-resistance-reducing and sand-carrying fracturing fluid and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: Preparation of fracturing fluid stock solution

[0047] The composition of the water phase raw material of the fracturing fluid emulsion stock solution is shown in Table 1 below.

[0048] Table 1

[0049] name mass (g) Acrylamide 238 sodium acrylate 126 AMPS sodium salt 126 N,N'-Diacetonepropionamidoethylenediamine 42 DMC 14 caustic soda Appropriate amount Deionized water 854 pH 6.3-6.4 sodium formate 350mg urea 3000mg EDTA 400mg

[0050] The oil phase raw material composition of the fracturing fluid emulsion stock solution is shown in Table 2 below.

[0051] Table 2

[0052] name mass (g) No. 10 white oil 510 span80 60 Tween 60 30

[0053] Weigh the raw materials of oil phase and water phase according to the raw materials in Table 1 and Table 2 respectively, and prepare the oil phase and water phase; mix and stir according to the mass...

Embodiment 2

[0057] Embodiment 2: the preparation of fracturing fluid stoste

[0058] The composition of the aqueous phase raw material of the fracturing fluid emulsion stock solution is shown in Table 4 below.

[0059] Table 4

[0060]

[0061]

[0062] The oil phase raw material composition of the fracturing fluid emulsion stock solution is shown in Table 5 below.

[0063] table 5

[0064] name mass (g) No. 10 white oil 510 span80 60 Tween 60 30

[0065] Weigh the raw materials of the oil phase and water phase according to the raw materials in Table 4 and Table 5 respectively, and prepare the oil phase and water phase; mix and stir according to the mass ratio of oil phase and water phase of 3:7 until the viscosity is 1100±50mPa.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 bisulfite, control the reaction temperature ...

Embodiment 3

[0069] Embodiment 3: Preparation of fracturing fluid stock solution

[0070] The composition of the water phase raw material of the fracturing fluid emulsion stock solution is shown in Table 7 below.

[0071] Table 7

[0072] name mass (g) Acrylamide 280 sodium acrylate 140 AMPS sodium salt 140 N,N'-Diacetonepropionamidoethylenediamine 56 DMC 37 caustic soda Appropriate amount Deionized water 747 pH 6.2-6.3 sodium formate 350mg urea 3000mg EDTA 400mg

[0073] The oil phase raw material composition of the fracturing fluid emulsion stock solution is shown in Table 8 below.

[0074] Table 8

[0075] name mass (g) No. 10 white oil 510 span80 60 Tween 60 30

[0076] Weigh the raw materials of oil phase and water phase according to the raw materials in Table 7 and Table 8 respectively, and prepare the oil phase and water phase; mix and stir according to the mass...

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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 stock solution and its preparation method, acidified fracturing fluid, resistance-reducing water and sand-carrying fracturing fluid, wherein the fracturing fluid emulsion is formed by emulsion polymerization, and the The emulsion is formed by mixing the water phase and the oil phase; the acidified fracturing fluid consists of 1.0-2.0% of the emulsion, 1-1.5% of the corrosion inhibitor, 0.5-1% of the iron ion stabilizer, 0.1-0.3% of the acid drainage aid, Made of 10-30% acid and the balance of water, the emulsion is the fracturing fluid stock solution; the resistance-reducing water is composed of 0.04-0.12% of the emulsion, 0.1-0.2% of the drainage aid, 0.2-0.5% of the anti-swelling agent and the balance The sand-carrying fracturing fluid is made of emulsion 1-2.5%, anti-swelling agent 0.2-0.5%, drainage aid 0.15-0.4% and the balance of water. The fracturing fluid stock solution, acidified fracturing fluid, anti-resistance water or suspended sand fracturing fluid of the present invention require different fracturing fluid emulsions, and the on-site construction can adjust the formula at any time according to the actual situation. Good demulsification performance, simple production process, low cost, outstanding temperature resistance and salt resistance.

Description

technical field [0001] The invention relates to the field of fracturing fluids for oil and gas field reconstruction, in particular to a fracturing fluid stock solution, an acidizing fracturing fluid, a water-resistance-reducing and sand-carrying fracturing fluid and a preparation method thereof. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68C09K8/72C09K8/88
CPCC09K8/68C09K8/725C09K8/882C09K2208/28
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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