Drill-feeding plugging agent used for oil-based drilling fluid, preparation method and application thereof

An oil-based drilling fluid and plugging technology while drilling, which is applied in the field of drilling plugging agents, can solve the problems of oil-based drilling fluid viscosity increase and poor plugging effect while drilling, and achieve the effect of improving plugging effect
CN106634898AInactive Publication Date: 2017-05-10CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-05-10
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a drill-feeding plugging agent used for oil-based drilling fluid, a preparation method and an application thereof. The plugging agent comprises a sheet shape material with fineness less than 200 meshes, a granular material with fineness less than 200 meshes, a fibrous material with fineness less than 100 meshes, and an elastomeric material with fineness less than 100 mesh; wherein the weight ratio of the sheet shape material to the granular material to the fibrous material to the elastomeric material is (2-5): (4-8): (2-5): (0.5-3). The drill-feeding plugging agent can increase the plugging effect of a sand bed and small cracks. The drill-feeding plugging agent is added in the oil-based drilling fluid, in the sand bed with 20-40 meshes, the immersing depth of a filtrate is less than 3 cm, 0.5 mm of cracks are plugged, and the bearing capability is greater than 7 MPa.
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Description

technical field

[0001] The invention relates to the field of drilling plugging agents, and more specifically relates to a drilling-while-drilling plugging agent for oil-based drilling fluids, a preparation method and an application thereof. Background technique

[0002] During the domestic shale gas well drilling construction, the drilling fluid used in the reservoir section is oil-based drilling fluid, and the cost of oil-based drilling fluid is relatively high, reaching about 10,000 yuan / m3. During the drilling process of oil-based drilling fluid, if the daily consumption is high, the drilling cost will be greatly increased. Therefore, it is necessary to add a certain amount of plugging material while drilling during the drilling process to seal small cracks and prevent oil-based drilling. Drilling fluid leakage reduces daily consumption of permeability.

[0003] At present, there are few LWD materials specially used for oil-based drilling fluids at home and abroad. Most ...

Claims

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