A kind of drilling fluid for increasing mudstone drilling speed and its preparation method and application

A drilling speed and drilling fluid technology, applied in the field of drilling, can solve the problems that the drilling speed cannot be significantly increased, oil-based drilling fluid is easy to pollute the environment, and the cost of synthetic-based drilling fluid is high, achieving strong inhibition and cleanliness , avoid water absorption expansion and dispersion, and reduce the effect of reservoir damage

Active Publication Date: 2019-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, water-based drilling fluids and polyalcohol drilling fluids cannot prevent bit balling, have poor cleaning performance, and cannot significantly increase drilling speed; oil-based drilling fluids are easy to pollute the environment, difficult to configure, and high in cost; synthetic-based drilling fluids High cost

Method used

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  • A kind of drilling fluid for increasing mudstone drilling speed and its preparation method and application
  • A kind of drilling fluid for increasing mudstone drilling speed and its preparation method and application
  • A kind of drilling fluid for increasing mudstone drilling speed and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Add 25 parts of bentonite and 1 part of soda ash in 1000 parts (below are parts by weight) of water, leave standstill maintenance 24 hours after stirring for 4 hours, then add 5 parts of low-viscosity anionic cellulose, 2 parts of hydrolysis degree while stirring. 30%, PHPA with a molecular weight of 3 million, 5 parts of treatment agent RE, 3 parts of SDPA, 5 parts of temperature-resistant and salt-resistant fluid loss reducer, 25 parts of SMP-1 resin and 20 parts of asphalt, continue to stir for 20 minutes and then stand for later use .

Embodiment 2

[0037]Add 25 parts of bentonite and 1 part of soda ash to 1000 parts of water, stir for 4 hours and let it stand for 24 hours, then add 15 parts of high-viscosity polyanionic cellulose, 4 parts of cellulose with a hydrolysis degree of 40% and a molecular weight of 5 million while stirring. PHPA, 10 parts of treatment agent RE, 4 parts of D230, 10 parts of heat-resistant and salt-resistant fluid loss reducer, 30 parts of SMP-2 resin and 20 parts of shielding temporary plugging agent FD-1, continue to stir for 20 minutes and then stand for later use.

Embodiment 3

[0039] Add 10 parts of bentonite and 0.5 parts of soda ash to 1000 parts of water, stir for 4 hours and let it stand for 24 hours for curing, then add 2 parts of low-viscosity carboxymethyl cellulose, 2 parts of hydrolysis degree of 70% and molecular weight of 6 million while stirring PHPA, 5 parts of treatment agent RE, 2 parts of NH-1, 5 parts of temperature-resistant and salt-resistant fluid loss reducer, 20 parts of SMP-1 resin and 20 parts of asphalt, continue to stir for 20 minutes and then stand for later use.

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Abstract

The invention relates to a drilling fluid for improving the mudstone drilling speed. The drilling fluid is prepared from the following components by weight: 1000 parts of water, 10-30 parts of bentonite, 0.5-1.5 parts of sodium carbonate, 2-20 parts of a flow pattern regulator, 2-15 parts of a fast drilling agent, 2-8 parts of polyether amine, 1-6 parts of a polymer coating agent, 2-15 parts of a salt-tolerant and temperature resistant filtrate reducer, 20-35 parts of sulfonated phenolic resin and optionally 15-35 parts of an plugging agent. The accelerating drilling fluid provided by the invention has excellent resistance to salt, calcium and bad soil, and can effectively improve the rate of penetration. The invention also relates to a preparation method of the drilling fluid. The method includes the steps of: adding bentonite and sodium carbonate into water, mixing the substances evenly, then conducting standing maintenance, then adding the polymer flow pattern regulator, the polymer coating agent, the fast drilling agent, polyether amine, the salt-tolerant and temperature resistant filtrate reducer, sulfonated phenolic resin and the plugging agent, mixing the substances evenly, and performing standing for standby use. The invention also relates to application of the accelerating drilling fluid.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a drilling fluid for increasing mudstone drilling speed. The invention also relates to the preparation method and application of the speed-increasing drilling fluid. Background technique [0002] In the process of oil and gas exploration and development, as the well depth continues to increase, the downhole situation becomes more and more complex. We often encounter mudstone formations with strong plasticity, which are very easy to absorb water, expand, shrink, and generate slurry, resulting in shrinkage, bit balling and Jamming accidents occur frequently, seriously affecting the safety of underground drilling and development progress. Drilling speed is the key factor affecting the speed of exploration and development. Increasing the drilling speed can reduce the occupation of drilling rig resources, improve drilling efficiency, greatly reduce drilling costs, shorten the soakin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/24
CPCC09K8/24C09K2208/28
Inventor 王海波钱晓琳张国刘贵传徐江梅春桂
Owner CHINA PETROLEUM & CHEM CORP
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