Shale inhibitor organosilicon polymer used for drilling fluid and preparation method of shale inhibitor organosilicon polymer

A technology of shale inhibitors and polymers, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of reducing the expansion coefficient of shale, reducing the rate of clay slurrying, etc., so as to reduce the expansion coefficient and improve the Rheological properties, moisture content suppression effect

Active Publication Date: 2017-05-03
石家庄华莱鼎盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above technologies have a strong inhibitory effect on how to make organosilicon polymers have a strong ability to adsorb and coat clay particles, which can effectively reduce the expa

Method used

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  • Shale inhibitor organosilicon polymer used for drilling fluid and preparation method of shale inhibitor organosilicon polymer
  • Shale inhibitor organosilicon polymer used for drilling fluid and preparation method of shale inhibitor organosilicon polymer
  • Shale inhibitor organosilicon polymer used for drilling fluid and preparation method of shale inhibitor organosilicon polymer

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0039] Example 1: The shale inhibitor organosilicon polymer for drilling fluids of the present invention is made from the following raw materials in weight ratio:

[0040]

[0041] The aforementioned natural polymer is selected from lignin, the aforementioned azo initiator is selected from azobisisoheptonitrile, and the molecular weight regulator is selected from dodecyl mercaptan.

[0042] The preparation method of the said shale inhibitor organosilicon polymer for drilling fluid includes the following process steps: ① First, weigh the natural high molecular polymer according to the above weight ratio, add it to the reactor, and add the natural high The molecular polymer undergoes a degradation reaction to hydrolyze it into a macromolecular compound at 80°C. The reaction time is 2 hours to obtain an intermediate product; ②Then add the above-mentioned organosilicon monomer and azo to the intermediate product (in order) Class initiators and molecular weight regulators are polymerize...

Example Embodiment

[0043] Example 2: The shale inhibitor organosilicon polymer for drilling fluid of the present invention is made from the following raw materials with the following weight ratio:

[0044]

[0045] The above-mentioned natural polymer is selected from chitosan, the above-mentioned azo initiator is selected from azobisisoheptonitrile, and the molecular weight regulator is selected from sodium methacrylsulfonate.

[0046] The preparation method of the said shale inhibitor organosilicon polymer for drilling fluid includes the following process steps: ① First, weigh the natural high molecular polymer according to the above weight ratio, add it to the reactor, and add the natural high The molecular polymer undergoes a degradation reaction to hydrolyze it into a macromolecular compound at 60°C. The reaction time is 2 hours to obtain an intermediate product; ②Then add the above-mentioned organosilicon monomer and azo into the intermediate product (in order) Class initiators and molecular wei...

Example Embodiment

[0047] Example 3: The shale inhibitor organosilicon polymer for drilling fluid of the present invention is made from the following raw materials with the following weight ratio:

[0048]

[0049] The aforementioned natural polymer is selected from cellulose, the aforementioned azo initiator is selected from azobisisovaleronitrile, and the molecular weight regulator is selected from mercaptopropionic acid.

[0050] The preparation method of the said shale inhibitor organosilicon polymer for drilling fluid includes the following process steps: ① First, weigh the natural high molecular polymer according to the above weight ratio, add it to the reactor, and add the natural high The molecular polymer undergoes a degradation reaction to hydrolyze it into a macromolecular compound at 70°C. The reaction time is 2 hours to obtain an intermediate product; ②Then add the above-mentioned organosilicon monomer and azo to the intermediate product (in order) Initiators and molecular weight regulat...

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Abstract

The invention discloses a shale inhibitor organosilicon polymer used for drilling fluid and a preparation method of the shale inhibitor organosilicon polymer. The shale inhibitor organosilicon polymer is prepared from the following raw materials including natural polymers, organosilicone monomers, azo type initiators and molecular weight regulators. The preparation method comprises the following technical steps that the natural polymers are weighed and added into a reaction kettle so as to be hydrolyzed into macromolecular compounds at 60-80 DEG C, the reaction time lasts for 2 hours to 2 hours and 10 minutes, and intermediate products are obtained; then, the organosilicone monomers, the azo type initiators and the molecular weight regulators are added into the intermediate products, polymerization is conducted at 120-160 DEG C, and the reaction time lasts for 8-10 hours. The shale inhibitor organosilicon polymer is high in inhibitive ability and clay particle adsorbing and coating capacity; and through the shale inhibitor organosilicon polymer, the expansion coefficient of shale is effectively decreased, the mud yield of clay is decreased, hydration dispersion of the shale is inhibited, the stability of a well wall is improved, collapse is inhibited, and a hydrocarbon reservoir is effectively protected.

Description

technical field [0001] The invention relates to a petroleum drilling fluid additive, in particular to a shale inhibitor organosilicon polymer for drilling fluid. The invention also relates to a preparation method of the shale inhibitor organosilicon polymer for drilling fluid. Background technique [0002] my country is rich in oil and gas resources. With the development of oil and gas fields in recent decades, shale inhibition and environmental protection have always been important topics in the study of drilling fluid performance. So far, the mature water-based drilling fluid system cannot meet the requirements of highly-inhibited highly deviated wells and Deep well performance needs. Shale is made of hardened clay particles that absorb water and swell and crack. Especially when carbonaceous shale is encountered during drilling, it swells and collapses in a very short period of time after encountering water, causing a series of downhole complex accidents such as well wall...

Claims

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Application Information

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IPC IPC(8): C08G77/04C08G77/06C08L83/04C08L97/00C08L5/08C08L1/02C09K8/035
CPCC08G77/04C08G77/06C08L83/04C09K8/035C09K2208/12C08L97/005C08L5/08C08L1/02
Inventor 陈利赵秀平
Owner 石家庄华莱鼎盛科技有限公司
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