A kind of shale stabilizer and preparation method thereof

A stabilizer and mud shale technology, which is applied in the field of mud shale stabilizer and its preparation, can solve the problems of high concentration, difficult to take into account at the same time, single action form, etc., to achieve improved dispersion stability, controllable synthesis conditions, principle reliable effect
CN108192107BActive Publication Date: 2019-06-04CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2019-06-04

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Abstract

The invention discloses a mud shale stabilizer. The mud shale stabilizer is acquired through the reaction of a silane coupling agent modified nanosilicon dioxide and a dendritic polymer. The inventionfurther provides a preparation method of the mud shale stabilizer. The mud shale stabilizer is prepared through the method. The hardness and softness combined physical blocking is realized with the help of the rigid blocking of the nanosilicon dioxide and the deformation filling of the nanoscale dendritic polymer, moreover, the strong absorption between a large quantity of end groups and the surface of the mud shale inhibits the hydration and swelling of the mud shale to achieve efficient chemical inhibition. The mud shale stabilizer achieves the double functions of the nanoscale physical blocking and the chemical inhibition, a new way and method is provided for the stabilizing the mud shale, and the mud shale stabilizer is of great theoretical significance and has an important application value.
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Description

technical field

[0001] The invention belongs to the field of petroleum engineering and oilfield chemistry, and in particular relates to a mud shale stabilizer and a preparation method thereof. Background technique

[0002] In drilling engineering, a series of downhole complex situations such as well wall collapse, pipe sticking and lost circulation caused by shale well wall instability have always been a worldwide engineering technical problem that plagues drilling engineering and needs to be solved urgently. When water-based drilling fluid is used to drill shale formations, under the effects of hydraulic pressure difference and chemical potential difference, there is pressure transfer and filtrate intrusion between the drilling fluid and the wellbore shale. Since the pore pressure cannot be transmitted quickly, The entry of a small amount of water will lead to a significant increase in pore pressure, which in turn will cause a decrease in the effective support stress of the...

Claims

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