Nanometer microemulsion cleanup additive

A technology of nano-microemulsion and drainage aid, which is applied in the direction of production fluid, wellbore/well components, drilling composition, etc., to achieve the effect of improving the effect of fracturing reconstruction, good liquid flowback effect, and simple preparation method

Inactive Publication Date: 2015-07-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing technology has achieved certain results, it is still a subject of research to prepare a nano-microemulsi

Method used

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Examples

Experimental program
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Example Embodiment

[0028] Example 1

[0029] This embodiment provides a nano-microemulsion drainage aid, the concentrate is composed of the following raw materials, in weight percentage: 31.3% amino silicone oil with an amino value of 0.4 and a viscosity of 1000 cps, and a nonionic surfactant with ten isomers. Triol polyoxypropylene (4) polyoxyethylene (6) ether 17.4%, ethylene glycol monobutyl ether 1%, glacial acetic acid 2.8%, water 47.5%.

[0030] The nano-microemulsion drainage aid of this embodiment is prepared by the following method:

[0031] Step 1. Mix amino silicone oil, non-ionic surfactant isotridecyl alcohol polyoxypropylene (4) polyoxyethylene (6) ether, ethylene glycol monobutyl ether, glacial acetic acid and water to prepare nano microemulsion Concentrated liquid of drainage aid, the concentrated liquid is an O / W microemulsion with a solid content of 48.7%.

[0032] Step 2: Dilute the concentrated microemulsion with an aqueous solution with a concentration of 2wt% KCl, and the content ...

Example Embodiment

[0036] Example 2

[0037] This embodiment provides a nano-microemulsion drainage aid, the concentrate is composed of the following raw materials, in weight percentage: 10% amino silicone oil with an amino value of 0.4 and a viscosity of 800 cps, D-limonene 20%, non-ionic Surfactant isomerized tridecyl alcohol polyoxypropylene (4) polyoxyethylene (6) ether 22%, glacial acetic acid 1%, butanol 7%, water 40%.

[0038] The nano-microemulsion drainage aid of this embodiment is prepared by the following method:

[0039] Step 1: Mix amino silicone oil, D-limonene, non-ionic surfactant, isomerized tridecanol polyoxypropylene (4) polyoxyethylene (6) ether, glacial acetic acid, butanol and water to prepare nano microemulsion Concentrated liquid of drainage aid.

[0040] Step 2: Dilute the concentrated microemulsion with a KCl aqueous solution with a concentration of 2wt%, and the content of the concentrated liquid is 0.2wt% to obtain a uniform, transparent, light blue nano-microemulsion aid, a...

Example Embodiment

[0052] Example 3

[0053] This embodiment provides a nano-microemulsion drainage aid, the concentrate is composed of the following raw materials, in terms of weight percentage: 5% amino silicone oil with an amino value of 0.4 and a viscosity of 800 cps, 25% fatty acid methyl ester, non-ionic Surfactant isomeric tridecyl alcohol polyoxypropylene (4) polyoxyethylene (6) ether 20%, dodecyl amine oxide 10%, glacial acetic acid 1%, ethylene glycol monobutyl ether 11%, water 28% .

[0054] The nano-microemulsion drainage aid of this embodiment is prepared by the following method:

[0055] Step one, isomerize amino silicone oil, fatty acid methyl ester, nonionic surfactant, tridecyl alcohol polyoxypropylene (4) polyoxyethylene (6) ether, dodecyl amine oxide, glacial acetic acid, ethylene glycol monobutyl Ether is mixed with water to prepare a concentrated solution of nano-microemulsion aid.

[0056] Step 2: Dilute the concentrated microemulsion with a KCl aqueous solution with a concentrat...

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Abstract

The invention provides a nanometer microemulsion cleanup additive. The invention provides a concentrate of the nanometer microemulsion cleanup additive. The concentrate comprises 20-45wt% of oil, 15-45wt% of a surfactant, 0.1-35wt% of a cosolvent, 0.1-5wt% of an organic acid, and the balance of water. The invention also provides the nanometer microemulsion cleanup additive prepared by using the concentrate. Amino silicone oil is used as the necessary component of the oil, so the nanometer microemulsion cleanup additive has high fluid flow-back efficiency; the nanometer microemulsion cleanup additive and a fracturing fluid are injected into an oil well to carry out fracturing reconstruction of an oil-gas reservoir, so the fracturing fluid has a good water lock damage clearing performance and promotes the flow-back of the fracturing fluid, thereby the fracturing reconstruction effect of the oil-gas reservoir is improved, and the output of natural gas is increased; and the nanometer microemulsion cleanup additive is simple to prepare, and is convenient to use.

Description

technical field [0001] The invention relates to an ultra-low permeability gas well nano microemulsion drainage aid, which belongs to the field of fracturing agents for oil and gas exploitation. Background technique [0002] With the deepening of oil and gas reservoir exploitation, in order to extract more and deeper oil and gas, the transformation of ultra-low permeability reservoirs has increasingly become the main development field, so fracturing technology has become an important production increase in oil and gas field development measure. As a fracturing fluid drainage aid for fracturing, it plays an important role in increasing production, because for ultra-low permeability, formation capillary water lock damage is very serious, and some data show that 60-90% injection in shale gas fracturing The fluid stays in the formation, and most of the water is trapped around the frac fractures and in the frac fractures. These closed and stagnant liquids will seriously reduce t...

Claims

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Application Information

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IPC IPC(8): C09K8/74E21B43/27
Inventor 杨江管保山卢拥军姜伟邱晓惠
Owner PETROCHINA CO LTD
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