Modified alkyl glycoside high-temperature-resistant inhibitor as well as preparation method and application thereof

An alkyl glycoside and high temperature resistance technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems that the inhibition performance and temperature resistance performance need to be improved, cannot meet the high temperature formation suppression and anti-slump, and high cost, and achieve High inhibition and anti-slump performance, favorable on-site application, and mild reaction conditions

Pending Publication Date: 2022-01-14
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when deep wells (>4572m) and ultra-deep wells (>6000m) are drilled, and the formation temperature is higher (>200°C), the requirements for the high temperature stability of the components in the drilling fluid system are even higher. Some inhibitors are still unable to meet the technical requirements for suppression and anti-slump in high-temperature formations
[0004] Among them, the use of alkyl glycosides in drilling fluids has a good inhibitory and anti-slump effect, but the amount added is large, the cost is high, and the inhibitory performance and temperature resistance performance also need to be improved

Method used

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  • Modified alkyl glycoside high-temperature-resistant inhibitor as well as preparation method and application thereof
  • Modified alkyl glycoside high-temperature-resistant inhibitor as well as preparation method and application thereof
  • Modified alkyl glycoside high-temperature-resistant inhibitor as well as preparation method and application thereof

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preparation example Construction

[0043] In the present invention, raw materials containing hydroxyalkyl groups, polyether groups, amino groups and sulfonic acid groups can be used to modify alkyl glycosides to obtain the modified alkyl glycoside products. Among them, the embodiment of the present invention provides the preparation method of the modified alkyl glycoside anti-high temperature strong inhibitor as described above, including the following steps:

[0044] S1, react after mixing the alkyl glycoside, halogenated epoxide and polymeric diol to obtain the halogenated alcohol polyether alkyl glycoside;

[0045] S2. Reacting the halohydrin polyether alkyl glycoside with an organic amine to obtain an amino polyether alkyl glycoside;

[0046] S3, reacting the amino polyether alkyl glycoside with sulfamic acid to obtain a modified alkyl glycoside with a strong inhibitor against high temperature.

[0047] In the embodiment of the present invention, the alkyl glucoside, the halogenated epoxide and the polymer...

Embodiment 1

[0058] Add 38g of epichlorohydrin, 80g of polyethylene glycol 200, 70g of methyl glucoside, and 4g of sulfuric acid into the reaction kettle, react at 95°C for 1.0h at a stirring speed of 800r / min, and lower to 40°C to obtain chlorohydrin polyether Methyl glucoside; slowly add 70g of ethylenediamine to the above reaction solution, keep the temperature at 85°C for 2.0h to obtain amino polyether methyl glycoside; add 24g of urea and 38g of sulfamic acid to the reaction solution, After reacting at ℃ for 0.5h, and cooling down to room temperature, a reddish-brown viscous modified methyl glycoside strong inhibitor against high temperature was obtained. The product yield is 85.66%.

[0059] The modified methyl glucoside prepared in Example 1 of the present invention was carried out infrared detection, and the results were as follows: figure 1 shown. Among them, at 3380cm -1 It is the stretching vibration peak of O-H bond, 2830~2950cm -1 It is the stretching vibration peak of the...

Embodiment 2

[0062] Add 38g of epichlorobutane, 160g of polyethylene glycol 400, 80g of ethyl glucoside, and 5g of citric acid into the reaction kettle, and react at 100°C for 1.5h at a stirring speed of 900r / min, and then lower it to 40°C to obtain chlorohydrins Polyether ethyl glucoside; slowly add 80g of diethylenetriamine to the above reaction solution, keep the temperature at 90°C for 3.0h to obtain amino polyether ethyl glucoside; add 28g of ethyl urea, 42g of amino Sulfonic acid, react at 50°C for 1.0h, and cool down to room temperature to obtain reddish-brown viscous modified ethyl glycoside with high temperature resistance and strong inhibitor. The product yield is 86.58%.

[0063] The modified ethyl glucoside prepared in Example 2 of the present invention was subjected to infrared detection, and the results included: at 3381cm -1 It is the stretching vibration peak of O-H bond, 2831~2952cm -1 It is the stretching vibration peak of the C-H bond in the methyl group and the methyl...

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Abstract

The invention belongs to the technical field of oilfield chemical drilling fluid treating agents, and provides a modified alkyl glycoside high-temperature-resistant strong inhibitor and a preparation method and application thereof. The preparation method comprises the following steps: subjecting halogenated epoxide, polymeric glycol and alkyl glycoside to reacting under catalysis of an acid catalyst so as to obtain halogenated alcohol polyether alkyl glycoside; subjecting the halogenated alcohol polyether alkyl glycoside to reacting with organic amine to obtain amino polyether alkyl glycoside; and subjecting the amino polyether alkyl glycoside to reacting with sulfamic acid serving as a sulfonating agent to generate the modified alkyl glycoside high-temperature-resistant strong inhibitor. The modified alkyl glycoside provided by the invention comprises an alkyl glycoside group, a hydroxyalkyl group, a polyether group, an amido group and a sulfonic acid group, and has a relatively good collapse inhibition effect under a high-temperature condition. In addition, the modified alkyl glycoside provided by the invention has no biotoxicity. The modified alkyl glycoside provided by the invention can be applied to drilling fluids, is suitable for drilling construction of formations such as deep wells and ultra-deep wells with relatively high formation temperature and with shale easy to collapse, and meets the requirements for well wall stability and environmental protection of high-temperature formations.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemical drilling fluid treatment agents, and in particular relates to a modified alkyl glycoside anti-high temperature strong inhibitor, its preparation method and application. Background technique [0002] The wellbore instability problem in the oil and gas drilling process of the petroleum industry has always been the main factor affecting the smooth progress of drilling construction, especially in the case of increasing number of deep wells, ultra-deep wells, horizontal wells, directional wells and highly deviated wells. particularly prominent. According to statistics, more than 90% of wellbore instability occurs in mud shale and mudstone formations. Studies have shown that the factors affecting wellbore stability are mainly physical and chemical factors and mechanical factors. From a physical and chemical point of view, if the drilling fluid has insufficient inhibition, the clay minerals i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/338C08G65/326C08G65/333C08G65/28C09K8/035
CPCC08G65/338C08G65/326C08G65/33306C08G65/2606C09K8/035
Inventor 司西强王中华王忠瑾谢俊钟灵赵莹
Owner 中石化石油工程技术服务有限公司
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