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Film-forming type scouring-resistant sand control agent emulsion

A kind of erosion-resistant, film-forming technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as rapid decline in oil well productivity, and achieve the effects of convenient construction, great promotion and application value, and strong applicability

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned prior art, the present invention provides a film-forming anti-scour sand control agent emulsion, which can form a viscous film with excellent particle fixation and super-scour resistance on the pore surface of oil layers and gravel-packed layers, effectively solving the problem of storage The rapid decline in oil well productivity caused by the migration of layer particles to block the gravel packing layer can significantly improve the effect of sand control packing, and has broad prospects for popularization and application

Method used

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  • Film-forming type scouring-resistant sand control agent emulsion
  • Film-forming type scouring-resistant sand control agent emulsion
  • Film-forming type scouring-resistant sand control agent emulsion

Examples

Experimental program
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Embodiment 1

[0018] Example 1 Preparation of film-forming anti-erosion sand control agent emulsion

[0019] Put 20g of alcohol-soluble polyamide resin particles HY-508 in 80g of ethanol solvent, stir evenly, and prepare an organic solution of polyamide; put 1.5g of laponite powder in 98.5g of water, stir evenly, and let it stand for three days for later use , to prepare a water dispersion system of hectorite. Place 0.5g of OP-10 in the laponite aqueous dispersion. Mix and mix 30g of organic solution and 70g of surfactant solution under high-speed stirring conditions to obtain the final product. The stirring speed is 3000 rpm and the stirring time is 10 minutes to prepare a film-forming nano-emulsion of erosion-resistant sand control agent.

Embodiment 2

[0020] Example 2 Preparation of film-forming anti-erosion sand control agent emulsion

[0021] Place 30g of benzene-soluble polyamide resin particles HY-388 in 70g of benzene-mixed solvent (volume ratio of benzene to xylene: 1:1), and stir evenly to prepare an organic solution of polyamide. Place 1 g of silicon dioxide powder in 99 g of water, stir evenly, and let stand for three days for later use to prepare a water dispersion system of silicon dioxide powder. 0.5g of OP-13 was placed in the silica aqueous dispersion. 50g of organic solution and 50g of surfactant solution were mixed under high-speed stirring conditions, the stirring speed was 3000 rpm, and the stirring time was 10 minutes to prepare a film-forming nanoemulsion of erosion-resistant sand control agent.

Embodiment 3

[0022] Example 3 Preparation of film-forming anti-erosion sand control agent emulsion

[0023] Place 30g of benzene-soluble polyamide resin particles HY-308 (high temperature resistant type) in 70g of xylene solvent and stir evenly to prepare an organic polyamide solution. 2.0 g of bentonite powder was placed in 98 g of water, stirred evenly, and left to stand for three days for later use to prepare a water dispersion system of bentonite powder. 0.5g of OP-15 was placed in the silica aqueous dispersion. 40g of organic solution and 60g of surfactant solution were mixed under high-speed stirring conditions, the stirring speed was 3000 rpm, and the stirring time was 10 minutes to prepare a film-forming nanoemulsion of erosion-resistant sand control agent.

[0024] The scouring performance of the film-forming anti-scouring sand control agent emulsion obtained in the above examples can reach 7000ml / h of scouring displacement, and the sand content at the outlet is less than 0.5g / L ...

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Abstract

The invention discloses film-forming type scouring-resistant sand control agent emulsion which is prepared by the following method: (1) putting resin particles into an organic solvent to prepare an organic solution of resin, wherein the resin particles are selected from polyamide; (2) putting nano particles into water to prepare nano particle aqueous dispersion; (3) adding an OP surfactant into the nano particle aqueous dispersion to prepare a surfactant aqueous solution; and (4) uniformly mixing the organic solution of resin with the surfactant aqueous solution under a stirring condition. Thefilm-forming type scouring-resistant sand control agent emulsion is applied to oil well filling and sand preventing, an adhesive film is automatically separated out and generated on the pore water wet surface of a gravel filling layer, stability of filling sand is kept, and the problem that the yield of an oil well is quickly reduced as the gravel filling layer is blocked by transferred storage-layer micro particles is effectively solved; the adhesive film is generated through a slug type pump injecting process, so that permeability of the oil layer is not damaged, relatively high flow conductivity is kept, and the stability of the filling sand is remarkably improved.

Description

technical field [0001] The invention relates to a chemical agent for sand control filling, in particular to a film-forming anti-scouring sand control agent emulsion, which belongs to the technical field of petroleum engineering. Background technique [0002] Reservoir particle migration is accompanied by various stages of oil recovery engineering. When the fluid flow velocity in the reservoir is greater than the maximum critical velocity of particle migration in the pores, it will cause a series of serious problems from the formation to the ground, such as: reservoir productivity decline Quickly, the sand filter pipe is blocked, the pump is stuck, and the solid pollutants on the ground increase. Due to the limitation of structure and performance, the currently widely used cationic polymer sand inhibitors can no longer meet the requirements of the current large pump extraction, long-term sand control and acidification for the control of particle migration. Therefore, it is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/57C09K8/575
CPCC09K8/572C09K8/5755C09K2208/10
Inventor 宋金波汪庐山魏芳熊伟孙秀钊武明鸣王东梅明霞吕超张锡娟王冰
Owner CHINA PETROLEUM & CHEM CORP