High temperature resistant micro-foam drilling fluid

A technology of high temperature resistance and drilling fluid, applied in the field of petroleum drilling fluid, can solve the problems of complex implementation process, reservoir damage, high cost, and achieve the effects of good rheology, ability to reduce hydration, and strong anti-pollution ability
CN104293328AInactive Publication Date: 2015-01-21无棣华信石油技术服务有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
无棣华信石油技术服务有限公司
Publication Date
2015-01-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to high temperature resistant micro-foam drilling fluid, and belongs to the technical field of petroleum drilling fluids. The drilling fluid comprises, by weight, 10-15 parts of modified attapulgite, 4-6 parts of sodium alpha-olefin sulfonate, 0.5-2 parts of nanometer titanium dioxide, 1-3 parts of tea saponin, 0.2-0.5 parts of nanometer molybdenum disulfide, 0.4-0.7 parts of nanometer zirconium dioxide, 3-5 parts of a fluid loss agent, 1-2 parts of a shale inhibitor and 100-130 parts of water. The high temperature resistant micro-foam drilling fluid has the advantages of good temperature and pollution resistance, strong mud shale inhibition ability, significant reduction of the shale hydration ability, maintenance of the stability of shale formation in the drilling process, reduction of the occurrence of underground complicated conditions, adaptation to and balance with the stratum pressure, good rheological property, meeting of rock debris carrying requirements, and suitableness for low pressure reservoir drilling.
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Description

technical field

[0001] The invention belongs to the technical field of petroleum drilling fluids, and in particular relates to a high-temperature-resistant microfoam drilling fluid. Background technique

[0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process. Drilling fluid is the blood of drilling, also known as drilling flushing fluid. Drilling fluid can be divided into clear water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to its composition.

[0003] When exploiting oil and natural gas under different geological conditions, the drilling fluid system is different. For deep oil and gas reservoirs with low pressure and low permeability, high shale content and high formation water salinity, it is best to use oil-based drilling fluid. However, oil-based drilling fluids cause serious environmental pollution, are easy to catch fire, and cost high. Conventional water-based drilling fluid density...

Claims

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