High-quality foam fracturing fluid and preparation method and application thereof

A foam fracturing fluid, high-quality technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of uneven foam size, short foam stabilization time, low foam rate, etc., and achieve excellent stability properties, good shear stability

Inactive Publication Date: 2021-12-31
BETTER OILFIELD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the defects of the existing low-density foam fracturing fluid such as short foam stabilization time, low foaming rate, uneven foam size and high temperature resistance, and proposes a high-quality foam fracturing fluid and its preparation method and Application, using several reagents such as stabilizer, compounding agent, foaming agent and foam stabilizer to coordinate and stir to obtain a density of 0.683g / cm 3 ~0.879g / cm 3 High-quality foam fracturing fluid, and used in low-pressure, low-permeability, leakage and water-sensitive formation stimulation stimulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: High-quality foam fracturing fluid and its preparation method

[0038] Raw material components and dosage: 98.6g of pure water, 0.118g of hydroxypropyl guar gum, 0.099g of polymer anionic polyacrylamide, 0.394g of disodium edetate, 1.183g of dodecyl phosphate and fatty alcohol poly Sodium oxyethylene ether sulfate 0.986g.

[0039] The preparation method is as follows:

[0040] S1. Add 98.6g of pure water into a 200ml container, slowly add 0.118g of hydroxypropyl guanidine into the pure water, and stir with a frequency conversion high-speed mixer at a speed of 1000r / min to avoid cementation of hydroxypropyl guanidine and finally form hydroxypropyl guanidine Base guar gum solution, spare;

[0041] S2. Add 0.099g high-molecular anionic polyacrylamide to the hydroxypropyl guanidine gum solution prepared in step S1, and stir with a frequency conversion high-speed mixer at a speed of 1000r / min to completely dissolve the high-molecular anionic polyacrylamide in t...

Embodiment 2

[0044] Embodiment 2: High-quality foam fracturing fluid and its preparation method

[0045] Raw material components and dosage: 109.3g of pure water, 0.164g of hydroxypropyl methylcellulose, 0.219g of polymer anionic polyacrylamide, 1.093g of disodium edetate, 1.749g of dodecyl phosphate and fat Sodium alcohol polyoxyethylene ether sulfate 1.312g.

[0046] The preparation method is as follows:

[0047] S1. Add 109.3g of pure water into a 200ml container, slowly add 0.164g of hydroxypropyl methylcellulose into the pure water, and stir with a frequency conversion high-speed mixer at a speed of 1000r / min to avoid hydroxypropylguanidine cementation and eventually form Hydroxypropyl guar gum solution, spare;

[0048] S2. Add 0.2199g polymer anionic polyacrylamide to the hydroxypropyl guanidine gum solution prepared in step S1, and stir with a frequency conversion high-speed mixer at a speed of 1000r / min to completely dissolve the polymer anion polyacrylamide in the hydroxypropyl ...

Embodiment 3

[0051] Embodiment 3: High-quality foam fracturing fluid and its preparation method

[0052] Raw material components and dosage: 126.8g of pure water, 0.228g of hydroxypropyl guar gum, 0.317g of polymer anionic polyacrylamide, 1.775g of disodium edetate, 2.536g of sodium alkylbenzene sulfonate and fatty alcohol polyacrylamide Sodium oxyethylene ether sulfate 2.029g.

[0053] The preparation method is as follows:

[0054] S1. Add 126.8g of pure water into a 200ml container, slowly add 0.228g of hydroxypropyl guanidine into the pure water, and stir with a frequency conversion high-speed mixer at a speed of 1000r / min to avoid the hydroxypropyl guanidine cementation and finally form hydroxypropyl guanidine Base guar gum solution, spare;

[0055] S2. Add 0.317g polymeric anionic polyacrylamide to the hydroxypropyl guanidine gel solution prepared in step S1, and stir with a frequency conversion high-speed mixer at a rate of 1000r / min to completely dissolve the polymeric anionic pol...

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Abstract

The invention discloses a high-quality foam fracturing fluid and a preparation method and application thereof, and the high-quality foam fracturing fluid is prepared from the following raw material components in parts by mass: 0.217 to 1.694 parts of a stabilizer, 0.394 to 3.388 parts of a compounding agent, 1.183 to 6.776 parts of a foaming agent, 0.986 to 6.098 parts of a foam stabilizer and 98.6 to 169.4 parts of water, the high-quality foam fracturing fluid with the density of 0.683 g / cm < 3 >-0.879 g / cm < 3 > can be prepared by mixing and stirring the raw material components. The high-quality foam fracturing fluid overcomes the defects that an existing low-density foam fracturing fluid is short in foam stabilizing time, low in foaming rate, uneven in foaming size, not resistant to high temperature and the like, the preparation process is simple, construction is easy, and the high-quality foam fracturing fluid is suitable for yield increasing transformation of low-pressure low-permeability, leakage and water-sensitive stratums.

Description

technical field [0001] The invention belongs to the technical field of fracturing reconstruction of oil and gas wells, and in particular relates to a high-quality foam fracturing fluid and its preparation method and application. Background technique [0002] With the continuous reduction of high-quality oil and gas reservoirs in China, the development of unconventional oil and gas reservoirs has increasingly become the research focus of many experts and scholars. The development of unconventional oil and gas reservoirs mainly includes tight sandstone gas reservoirs, shale gas, coalbed methane, etc. In the development of such oil and gas reservoirs, fracturing operations are generally used to stimulate production, but currently there are many problems in fracturing operations, such as Low formation energy, severe water lock damage, difficult flowback of fracturing fluid, serious secondary pollution of fracturing, etc. These problems lead to unsatisfactory stimulation effects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/70C09K8/68C09K8/88C09K8/90
CPCC09K8/703C09K8/68C09K8/882C09K8/90
Inventor 陈洋周长清王俊杰谭凡
Owner BETTER OILFIELD TECH
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