Polyamine mud shale inhibitor for drilling fluids, and preparation method thereof, and drilling fluid

A technology for mud shale and drilling fluid, which is applied in the field of polyamine mud shale inhibitor for drilling fluid and its preparation, and drilling fluid treatment agent, can solve the problems of severe reaction and difficult control, and achieves a simple and convenient preparation method. Mild effect of operation and reaction conditions

Inactive Publication Date: 2019-04-30
SINOPEC SSC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The polyamine mud shale inhibitors in the prior art mainly form a cross-linked amine-based polymer with a certain body structure through cross-linking polymerization, the reaction is

Method used

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  • Polyamine mud shale inhibitor for drilling fluids, and preparation method thereof, and drilling fluid
  • Polyamine mud shale inhibitor for drilling fluids, and preparation method thereof, and drilling fluid
  • Polyamine mud shale inhibitor for drilling fluids, and preparation method thereof, and drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] React 10g of epichlorohydrin under the catalysis of 30g of hydrochloric acid and react at 85°C for 0.5h to obtain chlorodiol; react the above chlorodiol with 10g of ethylenediamine and react at 45°C for 1.5h to obtain an intermediate product 1; react intermediate product 1, 5g ethanolamine with 0.8g thionyl chloride, react at 80°C for 0.5h to obtain intermediate product 2, then react intermediate product 2 with 10g ethylenediamine, react at 45°C for 1.5h to obtain Polyamide shale inhibitor for drilling fluid. The yield was 94.18%.

[0052] The polyamine shale inhibitor for drilling fluid prepared in Example 1 of the present invention is detected by infrared spectroscopy, and the detection result is that the polyamine shale inhibitor prepared in Example 1 of the present invention has a structure of formula I, and in formula I , m takes 1, n takes 0, and o takes 1.

[0053] According to the method described in the above-mentioned technical scheme, test the performance o...

Embodiment 2

[0055] React 10g of epichlorohydrin under the catalysis of 35g of sulfuric acid, and react at 90°C for 1.0h to obtain chlorodiol; react the above-mentioned chlorodiol with 15g of diethylenetriamine, and react at 50°C for 2.0h to obtain intermediate Product 1: react intermediate product 1, 10 g of ethanolamine and 1.0 g of thionyl chloride for 1.0 h at 90°C to obtain intermediate product 2, then react intermediate product 2 with 15 g of ethylenediamine, and react for 2.0 h at 50°C. A polyamine shale inhibitor for drilling fluid was obtained. The yield was 95.42%.

[0056] The polyamine shale inhibitor for drilling fluid prepared in Example 2 of the present invention was detected by infrared spectroscopy, and the detection result was that the polyamine shale inhibitor prepared in Example 2 of the present invention had a structure of formula I, and in formula I , m takes 1, n takes 1, and o takes 1.

[0057] According to the method described in the above technical solution, the...

Embodiment 3

[0059] 10g of epichlorobutane was reacted under the catalysis of 40g of phosphoric acid and reacted at 95°C for 1.5h to obtain chlorodiol; the above-mentioned chlorodiol was reacted with 20g of triethylenetetramine and reacted at 55°C for 2.5h to obtain Intermediate product 1; react intermediate product 1, 15g of ethanolamine and 1.2g of thionyl chloride at 95°C for 1.5h to obtain intermediate product 2, then react intermediate product 2 with 20g of ethylenediamine and react at 55°C for 2.5h , to obtain polyamine mud shale inhibitor for drilling fluid. The yield was 96.12%.

[0060] The polyamine shale inhibitor for drilling fluid prepared in Example 3 of the present invention is detected by infrared spectroscopy, and the detection result is that the polyamine shale inhibitor prepared in Example 3 of the present invention has the structure of formula I, and in formula I , m takes 2, n takes 2, and o takes 2.

[0061] According to the method described in the above technical s...

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Abstract

The invention provides a preparation method of a polyamine mud shale inhibitor for drilling fluids, wherein the polyamine mud shale inhibitor for drilling fluids is obtained by carrying out a reactionon a chlorinated epoxide, an acidic catalyst, polyethylene polyamine, ethanolamine, thionyl chloride and ethylenediamine. According to the present invention, the polyamine mud shale inhibitor is prepared by using the specific raw materials, and particularly thionyl chloride is added to the preparation components, such that the prepared polyamine mud shale inhibitor for drilling fluids has good shale inhibition property and good clay stabilizing performance; the prepared polyamine mud shale inhibitor has good lubricating property and good compatibility, and does not have biological toxicity; and the prepared polyamine mud shale inhibitor can be used in drilling fluids, and is suitable for strong water-sensitivity mud shale with high requirements, mud-containing rock and other easily collapsed stratums, and the well boring construction of shale gas horizontal wells. The invention further provides a polyamine mud shale inhibitor for drilling fluids.

Description

technical field [0001] The invention relates to the technical field of drilling fluid treatment agents, in particular to a polyamine shale inhibitor for drilling fluid, a preparation method thereof and drilling fluid. Background technique [0002] Polyamine refers to the polymer containing amine groups in the repeating structural unit. Polyamine is used as a mud shale inhibitor in drilling fluid, and its inhibitory performance is better than that of potassium chloride. Polyamine can enter the clay layer to form a single layer of adsorption. At the same time, hydrogen bonds are generated with the surface of the clay crystal layer. The main mechanism of action of the strong polyamine inhibitor is as follows: the ammonium cation formed by the partial dissociation of the polyamine in the solution neutralizes the negative charge on the surface of the clay through electrostatic interaction and reduces the hydration repulsion of the clay; at the same time, the polyamine forms hydro...

Claims

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Application Information

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IPC IPC(8): C09K8/03C09K8/035
CPCC09K8/03C09K8/035C09K2208/34
Inventor 司西强王中华李伟廷国安平谢俊吕跃滨
Owner SINOPEC SSC
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