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A kind of ionic liquid base drilling fluid and its preparation method

A technology of ionic liquid and preparation method, which is applied in the field of drilling fluid to achieve excellent suspension stability and rock-carrying performance, easy on-site application, and simple preparation method

Active Publication Date: 2021-08-13
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drilling fluid formulated with ionic liquid-based drilling fluid needs to have sufficient gel strength and suitable rheological properties to provide excellent suspension stability and rock-carrying performance. In addition, the fluid loss of the drilling fluid system also needs to be controlled within Appropriate range, but it is difficult to meet such requirements only by relying on ionic liquids

Method used

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  • A kind of ionic liquid base drilling fluid and its preparation method
  • A kind of ionic liquid base drilling fluid and its preparation method
  • A kind of ionic liquid base drilling fluid and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) 3 parts of flow regulator SL-KDPR, composed of Gemini type surfactant: polyoxyethylene surfactant = 2:3; (2) 3 parts of fluid loss reducer SL-KJL, composed of lignite Resin SPNH: sulfomethyl phenolic resin SMP-II = 3:2 ratio composition; (3) The weighting material is barite, and the weighting material is added so that the density of the drilling fluid is 1.5g / cm 3 ; (4) The base liquid is ethyl ammonium nitrate, 100 parts.

[0030] The above-mentioned components (1)-(3) are added to the component (4) sequentially in a conventional manner under the conditions of normal temperature and pressure and mechanical stirring according to the above-mentioned content, and then stirred for 2 hours after all the addition.

Embodiment 2

[0032] (1) 4 parts of flow regulator SL-KDPR, composed of Gemini surfactant: polyoxyethylene surfactant = 2:5; (2) 4 parts of fluid loss reducer SL-KJL, composed of lignite Resin SPNH: sulfomethyl phenolic resin SMP-II=5:2 ratio composition; (3) The weighting material is barite, and the weighting material is added so that the density of the drilling fluid is 2.0g / cm 3 ; (4) The base liquid is ethyl ammonium nitrate, 100 parts.

[0033] The above-mentioned components (1)-(3) are added to the component (4) sequentially in a conventional manner under the conditions of normal temperature and pressure and mechanical stirring according to the above-mentioned content, and then stirred for 2 hours after all the addition.

Embodiment 3

[0035] (1) 4 parts of flow regulator SL-KDPR, composed of Gemini surfactant: polyoxyethylene surfactant = 3:5; (2) 4 parts of fluid loss reducer SL-KJL, composed of lignite Resin SPNH: sulfomethyl phenolic resin SMP-II=3:1 ratio composition; (3) The weighting material is barite, and the weighting material is added so that the density of the drilling fluid is 2.5g / cm 3 ; (4) The base liquid is ethyl ammonium nitrate, 100 parts.

[0036] The above-mentioned components (1)-(3) are added to the component (4) sequentially in a conventional manner under the conditions of normal temperature and pressure and mechanical stirring according to the above-mentioned content, and then stirred for 2 hours after all the addition.

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Abstract

The invention relates to an ionic liquid-based drilling fluid. The ionic liquid-based drilling fluid is composed of the following raw materials in parts by weight: (1) 3-5 parts of flow pattern regulator SL-KDPR; (2) 3-5 parts of fluid loss reducer SL-KJL; (3) appropriate amount of weighting material (4) 100 parts of ethyl ammonium nitrate base liquid. The preparation method is: add the above-mentioned components (1)-(3) to the component (4) sequentially under the condition of normal temperature and pressure and stirring, and stir for 1-2 hours after adding all of them. Beneficial effects: (1) The flow pattern regulator involved in the present invention can provide sufficient gel strength and suitable rheological properties in ethylammonium nitrate, and provide excellent suspension stability and rock-carrying performance; (2) the The ionic liquid-based drilling fluid has strong inhibitory properties, excellent high temperature resistance, and low fluid loss, which can meet the needs of drilling; (3) The preparation method of the drilling fluid system is simple and convenient for field application.

Description

technical field [0001] The invention relates to a new type of drilling fluid system in the field of drilling fluid, in particular to a drilling fluid system using ionic liquid (ethylammonium nitrate) as the base fluid. Background technique [0002] According to different fluid media, drilling fluids can be generally divided into gas-based drilling fluids, water-based drilling fluids and oil-based (including synthetic-based) drilling fluids. The main feature of gas-type drilling fluid is low density, which also limits its application range. This type of drilling fluid is mainly suitable for drilling low-pressure oil and gas layers, easy-to-lose formations, and some heavy oil layers. Water-based drilling fluid refers to the drilling fluid system with water as the continuous phase. It is the most widely used, but its temperature resistance and inhibition performance are insufficient. Oil-based drilling fluid refers to the drilling fluid system that uses oil (including diesel o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/34
CPCC09K8/34
Inventor 宿振国王瑞和
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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