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

Inactive Publication Date: 2015-01-21
无棣华信石油技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the process of drilling low-pressure leakage formations, the use of traditional water-based drilling fluids cannot achieve near-balanced or under-balanced drilling, and will cause varying degrees of damage to the reservoir; air drilling has little damage to the reservoir, but The implementation process is complex and costly

Method used

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  • High temperature resistant micro-foam drilling fluid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high temperature resistant microfoam drilling fluid, comprising the following components in parts by weight: 10 parts of modified attapulgite, 4 parts of sodium α-alkenyl sulfonate, 0.5 parts of nano titanium dioxide, 1 part of tea saponin, nano 0.2 parts of molybdenum disulfide, 0.4 parts of nano zirconium dioxide, 3 parts of sulfonated phenolic resin, 1 part of polyquaternium salt, and 100 parts of water.

[0018] The preparation method of the modified attapulgite is to first place the attapulgite in NaOH with a concentration of 10% and soak it for 3 hours, then place it in an aqueous solution of HCl with a concentration of 13% for 2 hours, filter, and take the filter residue , washed with water until neutral and dried, then activated at 400°C for 3 hours.

[0019] The preparation method of the high-temperature resistant micro-foam drilling fluid of the present invention is to use a conventional physical stirring method to stir and mix all the raw materials in the a...

Embodiment 2

[0021] A high temperature resistant microfoam drilling fluid, comprising the following components in parts by weight: 15 parts of modified attapulgite, 6 parts of sodium α-alkenyl sulfonate, 2 parts of nano titanium dioxide, 3 parts of tea saponin, nano 0.5 parts of molybdenum disulfide, 0.7 parts of nano zirconium dioxide, 5 parts of sulfonated phenolic resin, 2 parts of polyquaternium salt, and 130 parts of water.

[0022] The preparation method of the modified attapulgite is to soak the attapulgite in NaOH with a concentration of 12% for 3 hours, then place it in an aqueous solution of HCl with a concentration of 15% for 3 hours, filter, and take the filter residue , washed with water until neutral and dried, placed at 450 ° C high temperature activation for 5 hours, that is.

[0023] The preparation method of the embodiment of the present invention is the same as that of embodiment 1.

Embodiment 3

[0025] A high temperature resistant microfoam drilling fluid, comprising the following components in parts by weight: 12 parts of modified attapulgite, 5 parts of sodium α-alkenyl sulfonate, 1 part of nano titanium dioxide, 2 parts of tea saponin, nano 0.3 parts of molybdenum disulfide, 0.6 parts of nano zirconium dioxide, 4 parts of sulfonated phenolic resin, 1.8 parts of polyquaternium salt, and 120 parts of water.

[0026] The preparation method of the modified attapulgite is to place the attapulgite at a concentration of 11% and soak it in NaOH for 3 hours, then place it in an aqueous solution of 14% HCl for 2.3 hours, filter, and take The filter residue was washed with water until neutral and dried, and activated at 420°C for 3.5 hours to obtain the final product.

[0027] The preparation method of the embodiment of the present invention is the same as that of embodiment 1.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/38
CPCC09K8/38C09K2208/10
Inventor 李瑞国
Owner 无棣华信石油技术服务有限公司
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