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High-temperature-resistant organic/inorganic hybrid polymer filtrate reducer and preparation method thereof

A fluid loss control agent, high temperature resistant technology, applied in the field of drilling fluids

Pending Publication Date: 2021-03-09
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a water-based drilling fluid anti-high temperature organic / inorganic hybrid polymer fluid loss reducer suitable for deep shale formations and its preparation method to solve the problems existing in the prior art

Method used

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  • High-temperature-resistant organic/inorganic hybrid polymer filtrate reducer and preparation method thereof
  • High-temperature-resistant organic/inorganic hybrid polymer filtrate reducer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] Mix 18g of acrylamide, 6mL of N-vinylpyrrolidone and 6g of dimethyldiallylammonium chloride in 100mL of deionized water, dissolve and stir evenly, and add sodium hydroxide and stir to adjust the pH to 9. Take another Erlenmeyer flask, add 100mL deionized water and 0.5g modified nano-silica to it, and use an ultrasonic disperser to ultrasonically disperse for 25min to prepare a modified nano-silica suspension. Then, the mixed solution was transferred to a 250mL three-necked flask, heated under nitrogen protection, and 10mL of modified nano-silica suspension was added, the temperature was raised to 70°C, and 0.6g of ammonium persulfate and 0.6g of sulfurous acid were added to the three-necked flask. Sodium hydrogen, stirred and reacted for 7h, a milky white viscous liquid was obtained. The prepared primary product was cooled to room temperature, then placed in a vacuum drying oven at 65° C. for 24 hours, ground and pulverized to obtain a fluid loss reducer for water-based...

Embodiment 2

[0026] Mix 18g of acrylamide, 3mL of N-vinylpyrrolidone and 9g of dimethyldiallylammonium chloride in 100mL of deionized water, dissolve and stir evenly, and the rest of the preparation steps are exactly the same as in Example 1.

Embodiment 3

[0028] Mix 15g of acrylamide, 6mL of N-vinylpyrrolidone and 9g of dimethyldiallylammonium chloride in 100mL of deionized water, dissolve and stir evenly, and the rest of the preparation steps are exactly the same as in Example 1.

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Abstract

The invention discloses a water-based drilling fluid high-temperature-resistant organic / inorganic hybrid polymer filtrate reducer and a preparation method thereof. The preparation method comprises thefolloiwng steps: uniformly mixing three organic monomers including acrylamide, dimethyl diallyl ammonium chloride and N-vinyl pyrrolidone in proportion, adjusting the pH value to 9, transferring themixture into a three-neck flask, adding inorganic monomer modified nano silicon dioxide while introducing nitrogen, performing ultrasonic dispersion for 25 minutes by an ultrasonic dispersion instrument, transferring the mixture into the three-neck flask, heating to 70 DEG C, adding an initiator, reacting for 7 hours under stirring to obtain milk white viscous liquid, cooling, drying, grinding andcrushing to obtain the organic / inorganic hybrid quaternary graft copolymer. In the invention, the four reaction monomers do not contain sulfonation groups, and the filtrate loss reduction effect of the four reaction monomers at 150-210 DEG C is better than that of a common sulfonation type high-temperature-resistant filtrate loss reducer for an oil field, so that the filtrate loss reducer is environment-friendly and has good filtrate loss reduction property, and the temperature resistance can reach 210 DEG C.

Description

technical field [0001] The invention relates to the field of drilling fluids, in particular to a water-based drilling fluid anti-high temperature organic / inorganic hybrid polymer fluid loss reducer and a preparation method thereof. Background technique [0002] With the increasing demand for energy, the exploration and development of deep and unconventional oil and gas reservoirs has become the focus of global oil and gas exploration and development in recent years. Deep oil and gas reservoirs have frequent downhole leakage accidents due to their deep burial and high bottomhole temperature; unconventional oil and gas reservoirs such as shale oil and gas reservoirs, because shale contains water-sensitive clay minerals, when in contact with drilling fluid, will The hydration and expansion of mud shale, which stabilizes the borehole wall of the middle-deep mud shale, has become a bottleneck restricting shale gas exploitation. Therefore, how to form a high-quality filter cake w...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/56C08F226/04C08F226/10C09K8/035
CPCC08F292/00C09K8/035C08F220/56C08F226/04C08F226/10
Inventor 苏俊霖尹雨红左富银赵洋李立宗程翰锐张爱
Owner SOUTHWEST PETROLEUM UNIV
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