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High-temperature-resistant nanocomposite filtrate loss reducer for drilling fluid and preparation method thereof

A technology of nano-composite material and fluid loss reducing agent, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of lack of high temperature resistance, salt resistance, poor temperature resistance, and limited scope of use, etc. To achieve the effects of good temperature resistance and salt resistance, excellent characteristics, and simple and easy preparation method

Inactive Publication Date: 2014-02-26
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the temperature is too high, nanomaterials will fail due to high temperature degradation, which greatly limits their application range
At present, traditional nanomaterials do not have good high temperature resistance. At the same time, due to their own shortcomings, such as polymer materials, such as poor salt resistance and temperature resistance; while inorganic nanopowder materials maintain their nanometer size in complex underground conditions. Decentralization is also a very difficult and unavoidable problem

Method used

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  • High-temperature-resistant nanocomposite filtrate loss reducer for drilling fluid and preparation method thereof
  • High-temperature-resistant nanocomposite filtrate loss reducer for drilling fluid and preparation method thereof
  • High-temperature-resistant nanocomposite filtrate loss reducer for drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Under the protection of nitrogen, add a certain amount of nano-silica, silane coupling agent 3-methacryloxypropyltrimethoxysilane KH570 (the quality of KH570 is determined according to the particle size and quality of silica) into toluene solvent, stirred at room temperature for 3h, and separated by centrifugation (9500rpm, 30min) to obtain modified SiO 2 , and then rinsed with ethanol to remove excess silane coupling agent KH570, and then dried under vacuum to finally obtain powdered KH570 modified SiO 2 ,spare.

[0033] Styrene (St) was washed with 5% NaOH until light yellow, then washed with distilled water until neutral, dried over anhydrous magnesium sulfate, and then distilled under reduced pressure, stored in a refrigerator at 4 °C for later use.

[0034] Weigh a certain amount of lauryl sulfuric acid emulsifier and dissolve it in a certain amount of deionized water to form an aqueous solution; dissolve hexadecane HD in styrene monomer, stir to make it completel...

Embodiment 2

[0039] Dissolve dodecyltrimethylammonium bromide or sodium dodecylbenzenesulfonate in a certain amount of deionized water; dissolve hexadecane HD in styrene monomer, stir to dissolve HD completely, and then add Modified SiO 2 2.5wt%, and under the condition that the fine emulsification ultrasonic power is 300W, carry out ultrasonic fine emulsification on the monomer phase body for 20min to obtain the monomer fine emulsion;

[0040] Pour the monomer miniemulsion and N,N-dimethylacrylamide or N,N-diethylacrylamide or N-methylolacrylamide, acrylic acid, AMPS mixed solution with a mass ratio of 10:2:2 into the reaction bottle;

[0041] Stir the mixed solution in the reaction bottle and pass nitrogen gas for 15 minutes, adjust the mixed solution in the reaction bottle with NaOH solution to make the pH range 9.0, and heat up to a polymerization temperature of 50°C, then put azobisisobutyronitrile , under the initiation of azobisisobutyronitrile, polymerize to obtain high temperatu...

Embodiment 3

[0043] Dissolve sodium dodecylsulfonate in a certain amount of deionized water; dissolve hexadecane HD in styrene monomer, stir to dissolve all HD, and then add modified SiO 22.5wt%, and under the condition that the fine emulsification ultrasonic power is 300W, carry out ultrasonic fine emulsification on the monomer phase body for 20min to obtain the monomer fine emulsion;

[0044] Mix the monomer miniemulsion and N-vinylmethylacetamide or N-vinylethylacetamide or diacetone acrylamide, acrylic acid, 2-acrylamido dodecyl sulfonate at a mass ratio of 10:2:2 Pour the mixed solution of acid or 2-acrylamido tetradecyl sulfonic acid or 2-acrylamido hexadecyl sulfonic acid into the reaction flask.

[0045] Stir the mixed solution in the reaction bottle and pass nitrogen gas for 15 minutes, adjust the mixed solution in the reaction bottle with NaOH solution to make the pH range 9.0, and heat up to a polymerization temperature of 50°C, then put azobisisobutyronitrile , under the initi...

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Abstract

The invention discloses a high-temperature-resistant nanocomposite filtrate loss reducer for drilling fluid and a preparation method thereof. The filtrate loss reducer is prepared by taking styrene, amide, acrylic acid, azodiisobutyronitrile, olefin sulfonate and nano SiO2 as raw materials and taking an oil phase solution as a continuous phase through reacting under the fine emulsion ultrasonic action of an emulsifier sodium dodecyl sulfate so as to generate a copolymer. The resisted temperature of the filtrate loss reducer can reach 220 DEG C, and the filtrate loss reducer is good in calcium resistance and salt resistance; the filtrate loss reducer is simple and feasible in preparation method, mild and controllable in reaction conditions, high in grafting efficiency, high in reaction speed, and low in cost.

Description

technical field [0001] The invention relates to a fluid loss reducer used in drilling and a preparation method thereof, in particular to a high temperature resistant nanocomposite fluid loss reducer for drilling fluid and a preparation method thereof. Background technique [0002] With the continuous increase of the world's energy demand, the development of oil and gas resources in deep formations has become inevitable, which puts forward higher requirements for drilling technology. Drilling fluid technology is an important part of drilling technology, and its performance is directly related to drilling quality and drilling cost, and even drilling success or failure. The fluid loss performance of drilling fluid under high temperature and high pressure conditions in deep formations is an important part of the comprehensive performance of drilling fluids, and the control of drilling fluid fluid loss under high temperature and high pressure conditions is achieved by high temper...

Claims

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Application Information

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IPC IPC(8): C09K8/035C08F212/08C08F2/26
CPCC09K8/035C08F212/08C08F226/02C08F220/58C08F220/06C08F220/585
Inventor 苏俊霖李之军蒲晓林任茂马毅超
Owner SOUTHWEST PETROLEUM UNIV
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