Application of aromatic amine hydrochloride serving as shale inhibitor for drilling fluid
A technology of aromatic amine hydrochloride and shale inhibitor, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., to achieve the effects of inhibiting shale dispersion, inhibiting clay hydration expansion, and excellent inhibitory effect
Active Publication Date: 2013-05-08
CHINA UNIV OF PETROLEUM (BEIJING)
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Among them, the problem of wellbore stability has always been a worldwide problem that cannot be completely solved in the drilling process. Accidents such as well collapse, diameter shrinkage, drill sticking, and bit bagging caused by wellbore instability cause a large number of oil industry problems every year. Economic losses
However, there is currently no matching drilling fluid plugging material that can effectively plug nano-micron pores and micro-fractures
Method used
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Embodiment 1
[0031] The dopamine hydrochloride prepared in the preparation example was dissolved in tap water to prepare an aqueous solution of dopamine hydrochloride with a concentration of 1% by weight. Five parts of 300 mL of 1% by weight dopamine hydrochloride aqueous solution were respectively selected for the determination of inhibitory effect evaluation.
Embodiment 2
[0045] The dopamine hydrochloride prepared in the preparation example was dissolved in tap water to prepare 0.2% by weight, 1.0% by weight and 1.5% by weight of dopamine hydrochloride aqueous solutions respectively. 300mL samples of each concentration were selected for the determination of inhibitory effect evaluation.
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The invention discloses an application of aromatic amine hydrochloride serving as a shale inhibitor for a drilling fluid. The aromatic amine hydrochloride, specifically dopamine hydrochloride, can be used for effectively inhibiting clay hydration and swelling as well as inhibiting dispersion and flaking of the shale, and also can be used for effectively plugging the pores and micro cracks on the near surface of the shale.
Description
technical field [0001] The invention relates to the application of aromatic amine hydrochloride as a shale inhibitor for drilling fluid. Background technique [0002] As the country's demand for oil and gas resources continues to expand and the number of wells with complex structures continues to increase, the performance of drilling fluid treatment agents must meet more stringent requirements. Among them, the problem of wellbore stability has always been a worldwide problem that cannot be completely solved in the drilling process. Accidents such as well collapse, diameter shrinkage, drill sticking, and bit bagging caused by wellbore instability cause a large number of oil industry problems every year. Economic losses. [0003] During the drilling process, 80% of the wellbore instability occurs in the shale formation. The clay in the shale is dispersed and exfoliated due to the hydration expansion of the shale, which is the most fundamental chemical factor leading to the in...
Claims
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IPC IPC(8): C09K8/035
Inventor 蒋官澄宣扬王金树耿浩男李颖颖
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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