Suspension acid thickening agent and preparation method thereof

A technology of thickening agent and suspending acid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of low viscosity, easy agglomeration, poor dispersibility of thickened acid, etc., and achieve high viscosity and not easy agglomeration , The effect of slurry stabilization

Inactive Publication Date: 2020-05-12
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The thickened acid prepared by this method has poor dispersibility, easy agglomeration and low viscosity

Method used

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  • Suspension acid thickening agent and preparation method thereof
  • Suspension acid thickening agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of suspending acid thickener, comprises following composition by weight percentage:

[0039] No. 3 white oil: 12 wt%,

[0040] No. 26 white oil: 10 wt%,

[0041] No. 100 white oil: 8 wt%,

[0042] No. 200 white oil: 10 wt%,

[0043] Organic bentonite: 6 wt%,

[0044] 100 mesh bentonite: 3 wt%,

[0045] 140 mesh kaolin: 9 wt%,

[0046] 160 mesh diatomaceous earth: 12 wt%,

[0047] 200 mesh fly ash: 9 wt%,

[0048] 95% ethanol: 3 wt%,

[0049] Thickener: 18 wt%.

[0050] Stir and mix the above-mentioned raw materials evenly in proportion, and the stirring time is 2 hours. After the stirring is completed, it is the product, code-named sample 1.

Embodiment 2

[0052] A kind of suspending acid thickener, comprises following composition by weight percentage:

[0053] No. 3 white oil: 19 wt%,

[0054] No. 26 white oil: 5 wt%,

[0055] No. 100 white oil: 6 wt%,

[0056] No. 200 white oil: 9 wt%,

[0057] Organic bentonite: 5 wt%,

[0058] 100 mesh bentonite: 7 wt%,

[0059] 140 mesh kaolin: 7 wt%,

[0060] 160 mesh diatomaceous earth: 7 wt%,

[0061] 200 mesh fly ash: 11 wt%,

[0062] 95% ethanol: 2 wt%,

[0063] Thickener: 22 wt%.

[0064] Stir and mix the above-mentioned raw materials evenly in proportion, and the stirring time is 2 hours. After the stirring is completed, it is the product, code-named sample 2.

Embodiment 3

[0066] A kind of suspending acid thickener, comprises following composition by weight percentage:

[0067] No. 3 white oil: 15 wt%,

[0068] No. 26 white oil: 13 wt%,

[0069] No. 100 white oil: 5 wt%,

[0070] No. 200 white oil: 8 wt%,

[0071] Organic bentonite: 3 wt%,

[0072] 100 mesh bentonite: 5 wt%,

[0073] 140 mesh kaolin: 6 wt%,

[0074] 160 mesh diatomaceous earth: 9 wt%,

[0075] 200 mesh fly ash: 12 wt%,

[0076] 95% ethanol: 1 wt%,

[0077] Thickener: 23 wt%.

[0078] Stir and mix the above-mentioned raw materials evenly in proportion, and the stirring time is 2 hours. After the stirring is completed, it is the product, code-named sample 3.

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Abstract

The invention relates to a suspension acid thickening agent and a preparation method thereof. The suspension acid thickening agent is prepared by stirring and mixing white oil with different labels, organic bentonite, 100-mesh bentonite, 140-mesh kaolin, 160-mesh diatomite, 200-mesh fly ash, ethanol with a concentration of 95% and a thickening agent according to a certain proportion. The suspension acid thickening agent provided by the invention is based on a particle grading theory and a close packing principle, through grading of particles (the bentonite, the kaolin, the diatomite, the fly ash and the thickening agent) with different mesh numbers, large particles form a network framework, while small particles fill gaps, so the stability of a slurry is realized by utilizing the interaction among the particles. Under the action of the white oil with different labels, the organic bentonite and the ethanol, the viscosity of the slurry is greatly improved, and the stability of the slurryis enhanced. The suspension acid thickening agent provided by the invention is low in apparent viscosity, high in thickening agent content, stable in slurry, capable of being rapidly dispersed in anacid liquor, not prone to caking, high in acid liquor viscosity, capable of meeting the acidification requirement and applicable to being used in gelled acid.

Description

technical field [0001] The invention and the technical field of chemical products relate to an oil well acidizing fluid, in particular to a suspension acid thickener and a preparation method thereof. Background technique [0002] At present, the development of oil and gas reservoir resources at home and abroad is becoming more and more intensive, and various measures for increasing production have appeared correspondingly, and acidification is one of them. The initial effect of conventional acidizing measures is obvious, but the effective period is short, the affected area is small, and it is easy to cause collapse near the wellbore. At present, various series of acid liquid systems have been developed to solve this problem, and gelled acid is one of them. Gelling acid is a retarded acid with a high molecular polymer as a thickening agent and 15-30% HCL plus corrosion inhibitors and other additives as the main ingredient. Its reaction speed with limestone is 3-7 times lowe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C09K8/78
CPCC09K8/74C09K8/78
Inventor 张颖李俊莉程雯李霁阳李移乐任海晶王晓晖
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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