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Shale inhibitor multi-branched polyamine for drilling fluid and preparation method of shale inhibitor multi-branched polyamine

A shale inhibitor and drilling fluid technology, applied in deep wells and ultra-deep wells, can solve problems such as stuck drilling and lost circulation, and achieve the effects of inhibiting hydration, dispersion and expansion, increasing water loss, and good temperature resistance.

Inactive Publication Date: 2018-09-04
TIANJIN TIANCHENG TUOYUAN TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clay expansion is also likely to cause some other drilling problems, such as lost circulation, pipe sticking, etc. Therefore, considering the frequency of encountering mud shale during drilling, the research and development of materials and methods for inhibiting mud shale expansion are in the Significant challenges remain in the oil and gas exploration industry

Method used

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Examples

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preparation example Construction

[0021] The present invention also provides a preparation method of the above-mentioned shale inhibitor multi-branched polyamine for drilling fluid, the method comprising the following steps:

[0022] (1) Polymerization reaction: under normal temperature conditions, add propylene oxide, butylene oxide and aliphatic amine polyoxyethylene ether into the reaction kettle according to the ratio, raise the temperature to 80-90°C, keep the temperature constant, and react for 2-4 hours ;

[0023] (2) Graft polymerization reaction: After the reaction in step (1) is completed, add active group compound to carry out graft polymerization reaction, and react at 80-90°C for 2-4 hours to obtain the final product;

[0024] (3) Discharging, measuring, packaging, testing and storage of the final product in the reactor.

[0025] The shale inhibitor for drilling fluid-multi-branched polyamine XZ-YZJ is arranged as a single molecule between the clay layers, and the inhibitor and the clay layer not...

Embodiment 1

[0029] The shale inhibitor multi-branched polyamine XZ-YZJ for drilling fluid provided in this embodiment, in parts by weight, includes: 30 parts of fatty amine polyoxyethylene ether, 30 parts of propylene oxide (PO), butylene oxide 20 parts of alkane (BO), 20 parts of 1-phenyl-2 nitropropene.

[0030] Preparation steps: (1) Polymerization reaction: at room temperature, add propylene oxide, butylene oxide and aliphatic amine polyoxyethylene ether into the reactor according to the proportion, raise the temperature to 80°C, keep the temperature constant, and react for 3 hours;

[0031] (2) Graft polymerization reaction: After the reaction in step (1) is completed, add the nitro compound-1-phenyl-2-nitropropene to carry out graft polymerization reaction, and react at 80° C. for 3 hours to obtain the final product;

[0032] (3) Discharging, measuring, packaging, testing and storage of the final product in the reactor.

[0033] The shale inhibitor multi-branched polyamine XZ-YZJ f...

Embodiment 2

[0037] The shale inhibitor multi-branched polyamine XZ-YZJ for drilling fluid provided in this embodiment, in parts by weight, includes: 30 parts of fatty amine polyoxyethylene ether, 25 parts of propylene oxide (PO), butylene oxide 25 parts of alkane (BO), 10 parts of 1-phenyl-2 nitropropene, 10 parts of 1-(4-chlorophenyl)-2 nitropropene.

[0038] Preparation steps: (1) Polymerization reaction: at room temperature, add propylene oxide, butylene oxide and aliphatic amine polyoxyethylene ether into the reactor according to the proportion, raise the temperature to 80°C, keep the temperature constant, and react for 2 hours;

[0039] (2) Graft polymerization reaction: After the reaction in step (1) is completed, add the nitro compound-1-(4-chlorophenyl)-2 nitropropene for graft polymerization reaction, and react at 90°C for 2h , to get the final product;

[0040] (3) Discharging, measuring, packaging, testing and storage of the final product in the reactor.

[0041] The shale in...

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Abstract

The invention belongs to the technical field of deep well and ultra deep well mining, and discloses a shale inhibitor multi-branched polyamine for drilling fluid and a preparation method thereof. Theinhibitor is prepared from the following raw materials in parts by weight: 30-40 parts of aliphatic amine, 30-40 parts of propylene oxide (PO), 20-30 parts of a butylene oxide (BO), and 20-30 parts ofa reactive group compound. The shale inhibitor is arranged in a single molecule between clay layers; in addition to the electrostatic interaction force between the inhibitor and the clay layers, theinhibitor forms hydrogen bonds with siloxane-based atoms of a clay crystal face; the inhibitor can also be combined with other treatment agents to form a synergistic effect, and through the combination with a physical plugging method and a chemical plugging method, the strength of the rock formation around the borehole wall is effectively increased, and the problem of swelling of mud shale is solved. The shale inhibitor multi-branched polyamine has a good capability of inhibiting clay from making mud, and the reduction rate of clay mud-making inhibition with the single-agent inhibitor can reach 70% or more than 70%.

Description

technical field [0001] The invention belongs to the technical field of deep wells and ultra-deep wells, and relates to additives for drilling fluids, in particular to a shale inhibitor multi-branched polyamine for drilling fluids capable of collecting flocculation, inhibiting and controlling low slurrying rate and a preparation method thereof. Background technique [0002] Exploration of deep wells, ultra-deep wells and extended-reach horizontal wells in the hinterland and southern margin of the Junggar Basin. The reservoirs in these areas are buried relatively deep, the formation pressure changes greatly, and the lithology is complex, so drilling is difficult, costly, and time-effective. During the drilling process, the drilling fluid faces many technical difficulties, such as: wellbore stability, lost circulation, wellbore purification, environmental pollution, high cost, etc. Especially the piedmont structure on the southern margin, the geological conditions are extremel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C08G65/26C08F283/06C08F226/02
CPCC08F283/06C08G65/2624C09K8/035C09K2208/12C08F226/02
Inventor 郑克祥赵俊岭黄凯罗亮裴成刘祖磊
Owner TIANJIN TIANCHENG TUOYUAN TECH DEV
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