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Synthetic hybrid polyamine drilling liquid inhibitor and preparation method thereof

A polyamine drilling and inhibitor technology, which is applied in the field of drilling, can solve the problems of poor practical effect and achieve the effect of strong inhibition and excellent salt and calcium resistance

Inactive Publication Date: 2018-03-13
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used inhibitors on the market are mainly low-molecular-weight polyamines and polymeric polyols, however, the practical effect is poor

Method used

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  • Synthetic hybrid polyamine drilling liquid inhibitor and preparation method thereof
  • Synthetic hybrid polyamine drilling liquid inhibitor and preparation method thereof
  • Synthetic hybrid polyamine drilling liquid inhibitor and preparation method thereof

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0021] A synthetic hybrid polyamine drilling fluid inhibitor, based on the surface hydration mechanism of clay minerals, the inventor designed and synthesized a low molecular weight branched polymer with a certain three-dimensional structure, and its molecular core is an alkane with certain hydrophobic properties. The terminal group is a strong polar positively charged amino group, relying on the two ends to tighten the distance between the clay mineral layer and the middle part to drain water, so as to achieve the purpose of water blocking and drainage in the clay mineral layer.

[0022] The raw materials for synthesizing hybrid polyamine drilling fluid inhibitors are:

[0023] 2.0075g ethylenediamine AR is 99.5%;

[0024] 22.8571g methyl acrylate AR ...

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Abstract

The invention discloses a synthetic hybrid polyamine drilling liquid inhibitor and a preparation method thereof. The method comprises the following steps: preparing raw materials including ethylene diamine, methyl acrylate and methyl alcohol. The preparation method comprises the following steps: mixing ethylene diamine and methyl acrylate; electromagnetically stirring; then adding methyl alcohol;continuously stirring; transferring into constant-temperature water bath; carrying out a reaction to obtain a product GCR; dissolving GCR through methyl alcohol; adding hexamethylendiamine; carrying out a reaction without light for 24h; then performing pressure reduction distilling. The inhibitor has the advantages that the purpose of blocking water and draining water in a clay mineral layer is achieved; a series of potential construction problems caused by hydration of shale can be avoided; the inhibiting performance is high; the salt and calcium resisting performances are outstanding.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a synthetic hybrid polyamine drilling fluid inhibitor and a preparation method thereof. Background technique [0002] At present, the vast majority of crude oil extraction comes from mud shale. However, when shale is drilled with conventional water-based drilling fluid, it often causes hydration expansion and dispersion of shale, accompanied by engineering problems of varying severity, such as pipe sticking and wellbore instability. In recent years, scholars at home and abroad have developed a variety of different types of water-based drilling fluid inhibitors, which can be divided into coating agents, plugging agents and inhibitors according to the inhibition mechanism. Among them, the inhibitor aims to fundamentally solve the problem of clay hydration, and make the hydrophilic clay minerals show hydrophobic properties by replacing the adsorption of water on the surface of sha...

Claims

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Application Information

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IPC IPC(8): C09K8/24C08G73/02
Inventor 苏俊霖董汶鑫黄进军何珍陈浩闫轩王雷雯罗亚飞卢俊峰刘路漫秦海
Owner SOUTHWEST PETROLEUM UNIV
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