Polyamine composite salt water-based drilling fluid and preparation method thereof

A drilling fluid and compound salt technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of complex composition of rheological stabilizers, difficulty in exerting excellent performance, and inability to obtain molecular configurations, and achieve excellent thermal stability. Stability, excellent reliable inhibition, excellent rheological effect

Active Publication Date: 2022-05-27
山东维斯特尔石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition of the rheological stabilizer is complex, and the preparation conditions are difficult to master. If the nano-sized molecular configuration cannot be obtained, it will be difficult to exert excellent performance

Method used

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  • Polyamine composite salt water-based drilling fluid and preparation method thereof
  • Polyamine composite salt water-based drilling fluid and preparation method thereof
  • Polyamine composite salt water-based drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A polyamine composite brine-based drilling fluid, comprising the following components by weight: calcium formate 1%, sodium carbonate 1%, polyamine inhibitor 6%, pentaerythritol ricinoleate 2%, high polymer fluid loss reducer 1%, 3% sodium perfluorononenyloxybenzene sulfonate, 1% nonylphenol ethoxylate, 2% barite powder, and the balance of deionized water; the polyamine inhibitor comprises the following steps: Preparation method: Add amino cyclodextrin and maleic anhydride in a molar ratio of 2.5:6 into the reaction kettle and mix thoroughly, heat to 90-100 ° C, add glacial acetic acid, stir in vacuum for 6 hours, stop heating, and then add deionized water Continue to stir for 1 hour, cool and stand to obtain the polyamine inhibitor; the high polymer fluid loss reducer is a copolymer of 2-acrylamido-2-methylpropanesulfonic acid, acrylamide and acrylic acid.

[0029] Its preparation method comprises the following steps:

[0030] S1: weigh each component in proportion; ...

Embodiment 2

[0034] A polyamine composite brine-based drilling fluid, comprising the following components by weight: calcium formate 2%, sodium carbonate 2%, polyamine inhibitor 6%, pentaerythritol ricinoleate 2%, high polymer fluid loss reducer 1%, 3% sodium perfluorononenyloxybenzene sulfonate, 1% nonylphenol ethoxylate, 2% barite powder, and the balance of deionized water; the polyamine inhibitor comprises the following steps: Preparation method: Add amino cyclodextrin and maleic anhydride in a molar ratio of 2.5:6 into the reaction kettle and mix thoroughly, heat to 90-100 ° C, add glacial acetic acid, stir in vacuum for 6 hours, stop heating, and then add deionized water Continue to stir for 1 hour, cool and stand to obtain the polyamine inhibitor; the high polymer fluid loss reducer is a copolymer of 2-acrylamido-2-methylpropanesulfonic acid, acrylamide and acrylic acid.

[0035] Its preparation method comprises the following steps:

[0036] S1: weigh each component in proportion; ...

Embodiment 3

[0040] A polyamine composite brine-based drilling fluid, comprising the following components by weight: calcium formate 2%, sodium carbonate 2%, polyamine inhibitor 8%, pentaerythritol ricinoleate 5%, sodium nitrohumate 2% %, polymer fluid loss reducer 2%, sodium perfluorononenyloxybenzene sulfonate 5%, nonylphenol polyoxyethylene ether 2%, barite powder 3%, and the balance of deionized water; The polyamine inhibitor is prepared by a method comprising the following steps: adding aminocyclodextrin and maleic anhydride in a molar ratio of 2.5:6 into a reaction kettle and mixing thoroughly, heating to 90-100° C., adding glacial acetic acid, and vacuum stirring for reaction for 6 hours , stop heating, then add deionized water to continue stirring for 1h, cool and stand to obtain the polyamine inhibitor; the high polymer fluid loss control agent is 2-acrylamido-2-methylpropanesulfonic acid, Copolymer of acrylamide and acrylic acid.

[0041] Its preparation method comprises the fol...

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PUM

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Abstract

The invention relates to the technical field of oilfield chemical agent preparation, in particular to a polyamine composite salt water-based drilling fluid and a preparation method thereof. Specific raw materials are used for synthesizing the polyamine inhibitor, and the polyamine inhibitor is scientifically compounded with various salt substances, so that the prepared drilling fluid has excellent rheology, filtration loss reduction, lubrication and other properties, the aging performance of the drilling fluid after high-temperature hot rolling is not obviously reduced, the biotoxicity grade of the drilling fluid is non-toxic, environment-friendly and pollution-free, and the preparation method is simple, convenient and feasible, and can be used for large-scale production.

Description

technical field [0001] The invention relates to the technical field of oilfield chemical preparation, in particular to a polyamine composite brine-based drilling fluid and a preparation method thereof. Background technique [0002] In drilling operations, most of the wellbore instability occurs in the mud shale formation, because it contains a large amount of clay minerals, which is prone to hydration during the drilling process, resulting in collapse, diameter reduction and other problems, which seriously affects the drilling operation. . [0003] Commonly used drilling fluid inhibitors include polymer type, bitumen type, humic acid type, etc., but they are usually accompanied by various disadvantages, such as being unfavorable to environmental protection, difficult to control rheological properties, etc., adapting to the drilling fluid system The performance is not high, and the composition design of the drilling fluid needs to be finely adjusted. At present, in order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/12C09K8/08C08F251/00C08F222/06
CPCC09K8/12C09K8/08C08F251/00C09K2208/34C09K2208/12C08F222/06
Inventor 孔庆明梁飞张新向王兆永
Owner 山东维斯特尔石油科技有限公司
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