Preparation method of organic soil for high-temperature-resistant water-in-oil drilling fluid

A water-in-oil drilling fluid, high temperature resistance technology, applied in drilling compositions, chemical instruments and methods, inorganic chemistry, etc. The effect of stick-shear and high-temperature stability

Pending Publication Date: 2021-09-03
SINOPEC NANJING RES INST OF CHEM IND CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the preparation method of organic soil in the market is generally made by ion exchange adsorption of cationic surfactant and highly dispersed hydrophilic clay. The preparation of organic soil for high temperature oil-based drilling fluid was studied

Method used

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  • Preparation method of organic soil for high-temperature-resistant water-in-oil drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0033] Disperse 50 parts of sodium-based soil into 700 parts of deionized water, stir at high speed to obtain a stable suspension, adjust the pH value of the suspension to 7~8, and set aside; chlorinate 20 parts of 1-octadecenetrimethyl Dissolve ammonium in 300 parts of deionized water and stir evenly to make it a clear and transparent solution for later use. Dissolve 10 parts of chelating agent in 100 parts of deionized water, stir evenly, and make it a clear and transparent solution for later use. Under high-speed stirring, quickly add 1-octadecenetrimethylammonium chloride solution to the suspension, react at 75°C for 1.5 hours, continue to add chelating agent, and stir for 1 hour. The product was cooled to room temperature, the residual Cl- in the product was repeatedly removed with deionized water, filtered, and the prepared organobentonite was vacuum-dried at 70°C, crushed and passed through a 200-mesh sieve to obtain the organobentonite product.

Embodiment 2

[0035] Disperse 60 parts of sodium-based soil into 800 parts of deionized water, stir at high speed to obtain a stable suspension, adjust the pH value of the suspension to 7~8, and set aside; chlorinate 22 parts of 1-octadecenetrimethyl Dissolve ammonium in 200 parts of deionized water and stir evenly to make it a clear and transparent solution for later use. Dissolve 8 parts of chelating agent in 100 parts of deionized water, stir evenly, and make it a clear and transparent solution for later use. Under high-speed stirring, quickly add 1-octadecenetrimethylammonium chloride solution to the suspension, react at 70°C for 1.5 hours, continue to add chelating agent, and stir for 1 hour. The product was cooled to room temperature, the residual Cl- in the product was repeatedly removed with deionized water, filtered, and the prepared organobentonite was vacuum-dried at 75°C, crushed and passed through a 200-mesh sieve to obtain the organobentonite product.

Embodiment 3

[0037] Disperse 65 parts of sodium-based soil into 800 parts of deionized water, stir at high speed to obtain a stable suspension, adjust the pH value of the suspension to 7~8, and set aside; chlorinate 24.8 parts of 1-octadecenetrimethyl Dissolve ammonium in 200 parts of deionized water and stir evenly to make it a clear and transparent solution for later use. Dissolve 9 parts of chelating agent in 100 parts of deionized water, stir evenly, and make it a clear and transparent solution for later use. Under high-speed stirring, quickly add 1-octadecenetrimethylammonium chloride solution to the suspension, react at 70°C for 1.5 hours, continue to add chelating agent, and react for 1 hour. The product was cooled to room temperature, the residual Cl- in the product was repeatedly removed with deionized water, filtered, and the prepared organobentonite was vacuum-dried at 70°C, crushed and passed through a 200-mesh sieve to obtain the organobentonite product.

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Abstract

The invention provides organic soil for high-temperature-resistant water-in-oil drilling fluid and a preparation method of the organic soil. The organic soil is prepared from the following raw materials in parts by weight: 50-75 parts of purified sodium-based bentonite; 15 to 30 parts of 1-octadecene trimethyl ammonium chloride; 1-10 parts of a chelating agent; and 1000 to 1500 parts of water. The organic soil for the high-temperature-resistant water-in-oil drilling fluid is resistant to high temperature, has good tackifying and shear-improving effects, and can improve the viscous shear force and high-temperature stability of the water-in-oil drilling fluid, so that the problems of barite sedimentation, poor rock-carrying capacity and the like caused by low viscous shear force of the drilling fluid in the process of drilling a deep well and an ultra-deep well are solved.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, relates to the technical field of organic soil for drilling fluid, in particular to a preparation method of organic bentonite for high-temperature resistant oil-based drilling fluid. Background technique [0002] Bentonite is a hydrous clay mineral mainly composed of montmorillonite, molecular formula: Na x (H 2 O) 4 (Al 2-X Mg 0.83 ) Si 4 o 10 )(OH) 2 , due to its special properties, such as: swelling, cohesiveness, adsorption, catalytic, thixotropy, suspension and cation exchange, etc., it is used in various fields. [0003] my country's bentonite mineral resources are very rich, and its content is second only to the United States, ranking second in the world. However, its deep processing and utilization are far behind foreign countries. It has been in the initial stage of development and application. In recent years, the research work on the deep processing and utilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/44C09K8/36
CPCC01B33/44C09K8/36
Inventor 吴琳田先国董天雷贺健殷惠琴
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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