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High-temperature-resistant and high-pressure-resistant viscosity reducer for oil-based drilling fluid and preparation method of viscosity reducer

A technology of oil-based drilling fluid and viscosity reducer, which is applied in the field of oil drilling, can solve problems such as unsuitable operation, viscosity reducer cannot withstand high temperature and high pressure, etc., and achieve large steric hindrance, good dilution and viscosity reduction effect, and reduce viscosity Effect

Active Publication Date: 2020-05-29
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing viscosity reducer cannot withstand high temperature and high pressure, and is not suitable for operation under high temperature and high pressure conditions

Method used

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  • High-temperature-resistant and high-pressure-resistant viscosity reducer for oil-based drilling fluid and preparation method of viscosity reducer
  • High-temperature-resistant and high-pressure-resistant viscosity reducer for oil-based drilling fluid and preparation method of viscosity reducer
  • High-temperature-resistant and high-pressure-resistant viscosity reducer for oil-based drilling fluid and preparation method of viscosity reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 5.16g of diethylenetriamine and 10.02g of lauric acid to the three-necked flask, control the molar ratio of the reactants to 1:1, then add 50g of xylene as the reaction medium and water-carrying agent, and put the magnet into the three-necked flask ;Put the three-necked flask in the oil bath, connect the water separator above the middle bottle mouth of the three-necked flask, connect the condensing reflux device above the water separator, and connect the thermometer on one side of the three-necked flask; open the condensing reflux device, and the oil bath starts Heating, the target temperature is 180°C, initially set the temperature of the oil bath to 150°C, when the temperature is close to the target temperature, adjust the preset temperature of the oil bath again, pay attention to the water in the water separator and the carrying water at all times during the heating process The amount of the agent is adjusted accordingly, and the heating rate is adjusted according...

Embodiment 2

[0034] Add 5.16g of diethylenetriamine and 10.02g of lauric acid to the three-necked flask, control the molar ratio of the reactants to 1:1, then add 50g of xylene as the reaction medium and water-carrying agent, and put the magnet into the three-necked flask Flask; put the three-necked flask in the oil bath, connect the water separator above the middle bottle mouth of the three-necked bottle, connect the condensing reflux device above the water separator, and connect the thermometer on one side of the three-necked flask; open the condensing reflux device, oil bath Start to heat up, the target temperature is 180°C, initially set the temperature of the oil bath to 150°C, when the temperature is close to the target temperature, adjust the preset temperature of the oil bath again, pay attention to the water in the water separator and the portable The amount of water agent, and adjust the heating rate accordingly, to avoid too fast temperature rise and cause a large amount of water...

Embodiment 3

[0037]Add 5.16g of diethylenetriamine and 10.02g of lauric acid to the three-necked flask, control the molar ratio of the reactants to 1:1, then add 50g of xylene as the reaction medium and water-carrying agent, and put the magnet into the three-necked flask Flask; put the three-necked flask in the oil bath, connect the water separator above the middle bottle mouth of the three-necked bottle, connect the condensing reflux device above the water separator, and connect the thermometer on one side of the three-necked flask; open the condensing reflux device, oil bath Start to heat up, the target temperature is 180°C, initially set the temperature of the oil bath to 150°C, when the temperature is close to the target temperature, adjust the preset temperature of the oil bath again, pay attention to the water in the water separator and the portable The amount of water agent, and adjust the heating rate accordingly, to avoid too fast temperature rise and cause a large amount of water-...

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Abstract

The invention discloses a high-temperature-resistant and high-pressure-resistant viscosity reducer for oil-based drilling fluid and a preparation method of the viscosity reducer. The preparation method comprises the step of carrying out ammonolysis modification on a hydrolysable plant extraction polyphenol by adopting a partially amidated active amine to obtain the viscosity reducer. The preparation method is simple in process, the raw materials are easy to obtain, the prepared viscosity reducer has good dilution and viscosity reduction effects, the dilution and viscosity reduction performanceis stable under the high-temperature and high-pressure conditions, and certain filtrate loss reduction performance is achieved.

Description

technical field [0001] The present application relates to but not limited to the technical field of oil drilling, in particular to but not limited to a high temperature and high pressure resistant oil-based drilling fluid viscosity reducer and a preparation method thereof. Background technique [0002] Oil-based drilling fluid is also called oil-based mud, and its chemical essence is water-in-oil emulsion. Compared with water-based drilling fluids, oil-based drilling fluids have the advantages of high temperature resistance, calcium salt erosion resistance, wellbore stability, good lubricity, and less damage to oil and gas layers, so they are widely used in oil and gas exploration and development. . With the development of shale gas and deepwater oil and gas gradually emerging in China, the research on oil-based drilling fluid is being further deepened. [0003] During the circulation process of drilling fluid, the network structure in the system is strengthened, the visco...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/32C09F1/04
CPCC09K8/035C09K8/32C09F1/04
Inventor 耿铁赵春花孙强狄雯雯李炎军张万栋黄熠刘雪婧王伟罗健生苗海龙孙德军
Owner CHINA NAT OFFSHORE OIL CORP
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