Super-amphiphobic Janus particles suitable for chip carrying agent for oil base drilling fluid and preparation method and application thereof

A silicon dioxide and particle technology, which is applied in the field of oil and gas drilling, can solve the problems of harsh dissolving properties of chip-carrying agents, complex production process of oil-soluble polymers, and high cost, so as to promote continuous exploration and development, increase speed and clean wellbore The effect of efficiency
CN109370549AActive Publication Date: 2019-02-22CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2019-02-22

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Abstract

The invention relates to the field of oil and gas drilling, in particular to super-amphiphobic Janus particles suitable for a chip carrying agent for an oil base drilling fluid and a preparation method and an application thereof. The Janus particles are silicon dioxide nanoparticles with dissymmetric modification on surfaces, wherein the part of surfaces of the Janus particles are modified by a first modifying group provided by silane as shown in a formula (1) and the rest parts of surfaces of the Janus particles are modified by a second modifying group provided by silane as shown in a formula(2). By combining the particularity of Janus particle structure and the performance asymmetricity, the particles play bubbling and stabilizing roles in an emulsified oil base drilling fluid. An efficiently chip carrying oil base drilling fluid system formed by taking the super-amphiphobic Janus particles chip carrying agent as a core treatment agent improves the drilling speed and the well purification efficiency of a complex well, thereby further promoting continuous exploration and development of irregular oil and gas reservoirs. The formulae are as shown in the description.
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Description

technical field

[0001] The invention relates to the field of oil and gas drilling, in particular to superamphiphobic Janus particles of silicon dioxide suitable for a debris-carrying agent for oil-based drilling fluids, and a preparation method and application thereof. Background technique

[0002] As my country's exploration and development are increasingly developed on the premise of deeper formations, higher requirements are put forward for drilling technology, and more stringent requirements are put forward for the performance of drilling fluids. In the drilling process of extended-reach wells and complex wells, it is difficult for water-wet cuttings to migrate with oil-based drilling fluids to form a "cuttings bed", especially in soil-free oil-based drilling fluids with weak gel strength. Serious potential safety hazards are caused. Conventional methods such as "optimizing the rheological parameters of drilling fluid, increasing the displacement of mud pumps, and movabl...

Claims

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