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A kind of polyamine composite brine-based drilling fluid and preparation method thereof

A drilling fluid and polyamine inhibitor technology, which is applied in the field of polyamine composite brine-based drilling fluid and its preparation, can solve the problems of complex composition of rheological stabilizers, difficulties in exerting excellent performance, and inability to obtain molecular configurations, etc., and achieve excellent Thermal stability, excellent reliable inhibition, excellent rheological effects

Active Publication Date: 2022-07-15
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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  • A kind of polyamine composite brine-based drilling fluid and preparation method thereof
  • A kind of polyamine composite brine-based drilling fluid and preparation method thereof
  • A kind of polyamine composite brine-based drilling fluid and preparation method thereof

Examples

Experimental program
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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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Abstract

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. Using specific raw materials to synthesize polyamine inhibitors, and scientifically compounding them with various salts, the prepared drilling fluid has excellent rheology, filtration loss, lubrication and other properties, and can undergo high-temperature thermal rolling without significant aging performance. The biological toxicity grade of the drilling fluid is non-toxic, environmentally friendly and non-polluting, and the preparation method is simple and feasible, and can be produced on a large scale.

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 problems such as collapse and diameter shrinkage, 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 t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/06C09K8/12C09K8/08C08F251/00
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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