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Thickener and preparation method thereof

A thickener and long-chain technology, which is applied in the field of thickeners for the preparation of clean and viscous acids, can solve the problem of acidification reformation of marine carbonate reservoirs, deep burial and thickening of marine carbonate reservoirs. Solve the problems of low temperature resistance of the agent, and achieve the effect of strong practicability, good performance and reasonable formula

Inactive Publication Date: 2012-02-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature resistance of the existing thickener is not high, and the viscosity of the clean viscous acid prepared by using it is not more than 30mPa.s at a high temperature of 120°C after reaction. The rheological properties are as follows: figure 2 shown
With the development of oil and gas exploration to complex oil and gas wells such as deep wells and ultra-deep wells, some marine carbonate reservoirs have deep burial, large thickness, high reservoir temperature (up to 150-160°C), and relatively high formation pressure. High, the above-mentioned clean viscous acid can no longer meet the needs of marine carbonate reservoir acidizing reconstruction due to the limitation of temperature resistance
In order to increase the development of marine carbonate reservoirs and increase oil and gas production, it is urgent to develop and prepare a high-temperature-resistant clean viscous acid to acidify marine carbonate reservoirs, and high-temperature-resistant clean The key technology for the preparation of viscous acid lies in the high temperature resistant thickener. Up to now, this key technical problem has not been effectively solved

Method used

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  • Thickener and preparation method thereof
  • Thickener and preparation method thereof
  • Thickener and preparation method thereof

Examples

Experimental program
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Embodiment 1-5

[0049] Example 1-5 (See Table 1)

[0050] Table 1 is five groups of formulas (raw material components and content) of the present invention in the following table

[0051]

[0052] The sodium salt in the above table is a by-product obtained during the reaction of long-chain fatty acid amidopropyl betaine. It does not need to be purchased and added separately, which makes rational use of resources and helps reduce production costs.

Embodiment 6

[0054] see image 3 , the preparation method of the present invention comprises the following sequential steps:

[0055] A. prepare long-chain fatty acid propyl hydroxy sultaine and long-chain fatty acid amidopropyl betaine respectively;

[0056] Wherein, the preparation of long-chain fatty acid propyl hydroxy sultaine comprises the following specific steps, a. under the condition that the pH value is 6, epichlorohydrin and sodium bisulfite are dripped in with the ratio of 1:1.2, Keep it at 1.5h to finish dropping, stir after dropping, control the reaction temperature to 88°C, and the reaction time to 4h to synthesize the intermediate product; b. The mass ratio of N,N-dimethyl long-chain tertiary amine to the intermediate product is 1: Put in N,N-dimethyl long-chain tertiary amine at a ratio of 1.05, the carbon chain number of N,N-dimethyl long-chain tertiary amine is 18, use a little phenolphthalein indicator as a solvent indicator, add a basic catalyst dropwise to keep the ...

Embodiment 7

[0069] see image 3 , the preparation method of the present invention comprises the following sequential steps:

[0070] A. prepare long-chain fatty acid propyl hydroxy sultaine and long-chain fatty acid amidopropyl betaine respectively;

[0071] Wherein, the preparation of long-chain fatty acid propyl hydroxy sultaine comprises the following specific steps, a. under the condition of pH 6.2, epichlorohydrin and sodium bisulfite are dripped with the ratio of 1:1.2, keeping After 1.5 hours of dropping, stir after dropping, control the reaction temperature at 85°C, and the reaction time of 4 hours to synthesize an intermediate product; b. The mass ratio of N,N-dimethyl long-chain tertiary amine to intermediate product is 1:1.05 Add N,N-dimethyl long-chain tertiary amine, the carbon chain number of N,N-dimethyl long-chain tertiary amine is 20, use a little phenolphthalein indicator as solvent indicator, add alkaline catalyst dropwise to keep the system alkaline , carry out the q...

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Abstract

The invention discloses a thickener and a preparation method thereof. The thickener comprises the following components in parts by mass: 20-25 parts of isopropanol, 35-40 parts of distilled water, 2-5 parts of inorganic salt, 15-25 parts of long chain fatty acid propyl hydroxyl sulpho betaine and 15-25 parts of long chain fatty acid amide propyl betaine. The preparation method comprises the following steps of: A, preparing the long chain fatty acid propyl hydroxyl sulpho betaine and the long chain fatty acid amide propyl betaine respectively; B, preparing materials according to the proportion; C, mixing the distilled water with the isopropanol to form a mixed solvent; D, adding the inorganic salt into the mixed solvent and uniformly stirring to form a mixed solution; and E, dissolving the long chain fatty acid propyl hydroxyl sulpho betaine and the long chain fatty acid amide propyl betaine of a solid sample into the mixed solution to obtain the thickener. The viscosity of a spent acid prepared with the method is 120 mPa.s at the temperature 120 DEG C and at the constant shearing speed 170s<-1>, is about 100mPa.s at the temperature 140 DEG C, and can still keep at 50 mPa.s at the temperature 160 DEG C. The spent acid has excellent high-temperature stiffening performance.

Description

technical field [0001] The invention relates to a thickener, in particular to a thickener used for preparing cleaning viscous acid, and a preparation method of the thickener. The clean viscosifying acid prepared by the invention can meet the needs of acidification reformation of 160°C high-temperature marine carbonate reservoirs. Background technique [0002] In the process of oil and gas drilling, it is often necessary to use acidizing operations to increase production. Acidizing operations mainly use the chemical dissolution of clean and viscous acid and the hydraulic effect of squeezing acid into the formation to remove oil layer plugging, expand and connect oil and gas layer pores, restore and improve oil and gas reservoir permeability. Cleaning and viscous acid is usually made by stirring hydrochloric acid, thickener and additives. The performance of thickener affects the performance of the whole cleaning and viscous acid. [0003] At present, the thickener used to pr...

Claims

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Application Information

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IPC IPC(8): C09K8/74
Inventor 武恒志王世泽潘宝风孙勇李尚贵刘多容张国东廖忠会刘徐惠张生军
Owner CHINA PETROLEUM & CHEM CORP
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