A kind of silicon amine base drilling fluid and preparation method thereof

A drilling fluid and silicon amine-based technology, applied in the fields of chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve the problems of difficult rheological control and weak anti-pollution ability, so as to reduce the fluid loss of the system, Ease of operation and effect of reducing the amount of intrusion

Active Publication Date: 2018-11-27
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in field application, the flocculation ability of this drilling fluid is too strong, the rheology is not easy to control, and the anti-pollution ability is weak, and the shale inhibition performance needs to be further improved

Method used

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  • A kind of silicon amine base drilling fluid and preparation method thereof
  • A kind of silicon amine base drilling fluid and preparation method thereof
  • A kind of silicon amine base drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Silicon amine-based drilling fluid, composed of the following components in mass percentage: sodium bentonite 4%, sodium carboxymethylcellulose (CMC) 0.2%, hydrolyzed polyacrylamide potassium salt (KPAM) 0.3%, organic silicon potassium humate OSAM-K 2%, emulsified asphalt SFT 3%, aminosilanol inhibitor 1%, NaOH 0.2%, BaSO 4 20%, and the balance is water; wherein, the structural formula of the aminosilanol inhibitor is shown in formula 8, where R 1 is hydrogen, m is 0, R 2 In n, take 0.

[0049] The preparation steps of aminosilanol inhibitor are:

[0050] 1) add 4mol formula 4 compound and 0.05 μ mol catalyst A (carbon supported platinum) in the there-necked flask that thermometer, fractionating column are equipped with, drop into formula 3 compound (3mol) from the constant pressure funnel on the condenser, drop speed control Keep the temperature of the liquid in the flask at about 85°C, complete the dropwise addition for about 7 hours, and then reflux until there ar...

Embodiment 2

[0057] Silicon amine-based drilling fluid, composed of the following components in mass percentage: sodium bentonite 4%, sodium carboxymethylcellulose (CMC) 0.2%, hydrolyzed polyacrylamide potassium salt (KPAM) 0.3%, organic silicon potassium humate OSAM-K 2%, emulsified asphalt SFT 3%, aminosilanol inhibitor 1%, NaOH 0.2%, BaSO 4 20%, and the balance is water; wherein, the structural formula of the aminosilanol inhibitor is shown in formula 8, where R 1 is hydrogen, m takes 1, R 2 Take 1 for n.

[0058] The preparation steps of aminosilanol inhibitor are:

[0059] 1) add 3.2mol formula 4 compound and 0.05 μ mol catalyst A (carbon supported platinum) in the there-necked flask that thermometer, fractionating column are housed, drop into formula 3 compound (4mol) from the constant pressure funnel on the condenser, drop rate Control the temperature of the liquid in the flask at about 85°C, complete the dropwise addition for about 7 hours, and then reflux until there are almost...

Embodiment 3

[0066] Silicon amine-based drilling fluid, composed of the following components in mass percentage: sodium bentonite 4%, sodium carboxymethylcellulose (CMC) 0.2%, hydrolyzed polyacrylamide potassium salt (KPAM) 0.3%, organic silicon potassium humate OSAM-K 2%, emulsified asphalt SFT 2%, aminosilanol inhibitor 1%, NaOH 0.2%, BaSO 4 20%, and the balance is water; wherein, the structural formula of the aminosilanol inhibitor is shown in formula 8, where R 1 is hydrogen, m takes 2, R 2 Take 2 for n.

[0067] The preparation steps of aminosilanol inhibitor are:

[0068] 1) Add 6mol formula 4 compound and 0.1 μ mol catalyst A (carbon-supported platinum) in the there-necked flask equipped with thermometer and fractionating column, drop into formula 3 compound (5mol) from the constant pressure funnel on the condenser, the rate of addition is controlled Keep the temperature of the liquid in the flask at about 85°C, complete the dropwise addition for about 7 hours, and then reflux un...

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Abstract

The invention discloses silicon amino drilling fluid and a preparation method thereof and belongs to the technical field of resource exploration and oil exploitation. The drilling fluid is prepared from, by mass, 3-5% of sodium bentonite, 02-0.3% of tackifier, 0.3-0.5% of a coating agent, 0.5-2% of a fluid loss additive, 3-5% of a blocking agent, 0.5-1% of amidocyanogen silanol inhibitor and 0.1-0.5% of NaOH. The structural general formula of the amidocyanogen silanol inhibitor is shown in the description, wherein in the formula 8, R1 is hydrogen, hydroxyl groups, hydroxybenzoate groups, alkyl groups with 1-5 carbon or alkoxy groups with 1-5 carbon, m is any integer from 0 to 2, R2 is shown in the description, and n is any integer from 0 to 3. The drilling fluid has high inhibition performance on shale, can effectively inhibit mud making of clay, has the excellent rheological property, is little in filter loss, effectively protects reservoir easily and can meet requirements of drilling operation.

Description

technical field [0001] The invention relates to a silicon amine-based drilling fluid and a preparation method of the drilling fluid, which belongs to the technical field of resource exploration and oil exploitation. Background technique [0002] Shale formations account for 70% of the total formations drilled, and more than 90% of well collapses occurred in shale formations, of which hard and brittle mud shale formations accounted for about two-thirds, and soft mud shale formations accounted for about one-third one. The soft mud shale is mud shale with high montmorillonite content, and the hard and brittle mud shale is mainly composed of illite and illite-montmorillonite mixed layers. The composition of the two is different, so the microstructure and instability mechanism are also different. If the content of montmorillonite in the upper formation is high, formation slurrying will easily damage the performance of the drilling fluid, and the hydration and expansion of montmo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/22C07F7/18
CPCC07F7/1804C07F7/1892C09K8/22
Inventor 张桂强向兴金刘霞何振奎李剑肖俊峰吕方王荐华松郑永超郑文武
Owner 中石化石油工程技术服务有限公司
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