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Composite steering micelle acidifying blockage removing liquid and preparation method thereof

A sour-acid and micelle technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor slowing effect of temperature difference, influence on steering ability, short validity period, etc.

Inactive Publication Date: 2020-10-16
陕西华天能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the research and development of viscoelastic surfactant (VES) turning acidizing technology, it is widely used in oil fields, and the technology is becoming more and more mature. However, it is found in the application that the simple turning acidizing system has a certain turning effect, but the temperature difference The retarding effect after steering is poor and the validity period is short; while the system with better retarding effect often affects its steering ability and delays the turning time

Method used

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  • Composite steering micelle acidifying blockage removing liquid and preparation method thereof
  • Composite steering micelle acidifying blockage removing liquid and preparation method thereof
  • Composite steering micelle acidifying blockage removing liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The compound diverting micellar acid acidification plugging solution of this embodiment is composed of the following raw materials by mass percentage: 15% hydrochloric acid, 3% oleic acid amidopropyl hydroxy sultaine, 2% cocamidopropyl amine oxide, 0.5% Oleic acid hydroxyethyl imidazoline, 1% citric acid, 0.5% choline chloride, the balance is water.

[0028] Specific preparation process.

[0029] According to the above proportion, oleic acid hydroxyethyl imidazoline, citric acid, choline chloride and hydrochloric acid are mixed evenly, and the balance is water to prepare component A.

[0030] Mix oleic acid amidopropyl hydroxy sultaine and cocamidopropyl amine oxide evenly, stir for 30 minutes, and prepare component B.

[0031] Mix component B and component A uniformly to obtain compound steering micellar acid acidification plugging solution.

[0032] Wherein, the mass concentration of hydrochloric acid is 31%, and the mass concentration of hydrofluoric acid is 40%. ...

Embodiment 2

[0034] The compound diverting micellar acid acidification deblocking solution of this embodiment is composed of the following raw materials by mass percentage: 10% hydrochloric acid, 4% hydrofluoric acid, 4% oleic acid amidopropyl hydroxy sultaine, 2% N,N- Dimethyl-N-octadecyloxymethylene betaine, 3% erucamidopropylamine oxide, 0.5% oleyl hydroxyethyl imidazoline, 0.5% cocoyl amphoteric imidazoline, 0.5% ethyl Disodium diamine tetraacetate, 1% choline chloride, and the balance is water.

[0035] Specific preparation process.

[0036] According to the above ratio, mix oleic acid-based hydroxyethyl imidazoline, coco-based amphoteric imidazoline, disodium edetate, choline chloride, hydrochloric acid and hydrofluoric acid, and mix the balance with water to prepare Component A.

[0037] Mix oleic acid amidopropyl hydroxy sultaine, N,N-dimethyl-N-octadecyloxymethylene betaine and erucic acid amidopropyl amine oxide evenly, stir for 30 minutes, and prepare components b.

[0038] ...

Embodiment 3

[0041] The compound diverting micellar acid acidification plugging solution of this embodiment is composed of the following raw materials by mass percentage: 12% hydrochloric acid, 3% hydrofluoric acid, 3% oleic acid amidopropyl hydroxy sultaine, 2% N,N- Dimethyl-N-Octadecyloxymethylene Betaine, 2% Erucamidopropylamine Oxide, 1% Cocamidopropylamine Oxide, 0.5% Oleyl Hydroxyethylimidazoline, 0.5% Coco-based amphoteric imidazoline, 1% citric acid, 1% choline chloride, and the balance is water.

[0042] Specific preparation process.

[0043] According to the above proportions, oleic acid-based hydroxyethyl imidazoline, cocoyl amphoteric imidazoline, citric acid, choline chloride, hydrochloric acid and hydrofluoric acid are uniformly mixed, and the balance is water to prepare component A.

[0044] Mix Oleamidopropyl Hydroxysultaine, N,N-Dimethyl-N-octadecyloxymethylene Betaine, Cocamidopropylamine Oxide and Erucamidopropylamine Oxide evenly , stirred for 30 minutes, and formulat...

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Abstract

The invention provides a composite steering micelle acidifying blockage removing liquid and a preparation method thereof, and belongs to the technical field of oil and gas field yield increase. The acidifying blockage removing liquid is prepared from the following raw materials in percentage by mass: 3%-7% of a diverting agent, 1%-4% of a micellar agent, 0.05%-5% of a corrosion inhibitor, 0.5%-3%of an iron ion stabilizer, 1%-3% of a clay stabilizer, 10%-25% of main acid and the balance of water. The composite steering micelle acidifying blockage removing liquid is formed by mixing a componentA and a component B. The component A is composed of a corrosion inhibitor, an iron ion stabilizer, a clay stabilizer and a main acid, and the component B is composed of a steering agent and a micelleagent. The acidifying blockage removing liquid provided by the invention is used for acidifying and reconstructing a heterogeneous reservoir, has a good field application effect, and is suitable forreservoirs with the temperature of 60-120 DEG C.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field production enhancement, and in particular relates to a compound steering micellar acid acidification plugging removal fluid. Background technique [0002] Acidizing is to inject acid liquid into oil and gas wells or water injection wells to remove blockages caused during the development process, restore or improve formation permeability, and achieve the purpose of increasing production or injection. [0003] Steering acid acidizing technology is a new method for the improvement of heterogeneous reservoirs that has emerged in recent years. It is mainly used for the improvement of reservoirs with severe heterogeneity and large differences in vertical permeability, and solves the problem of preferential entry of acid liquid with low resistance. High-permeability layers lead to excessive corrosion of high-permeability layers, while low-permeability layers have not been reformed. [0004] Vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C09K8/52
CPCC09K8/602C09K8/74C09K8/52C09K2208/30C09K2208/32
Inventor 周鹏程齐康路浩
Owner 陕西华天能源科技有限公司
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