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Efficient debris carrying agent Al2O3/SiO2 composite material suitable for water-based drilling fluid

A composite material and alkyl technology, which is applied in the field of Al2O3/SiO2 composite materials for high-efficiency debris-carrying agents for water-based drilling fluids, can solve problems such as unstable rheological properties at high temperatures, complex polymer synthesis processes, and difficulty in large-scale application. Achieve the effects of improving cuttings carrying effect, increasing drilling speed and wellbore cleaning efficiency, and improving wettability

Active Publication Date: 2021-11-19
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the water-based drilling fluid debris-carrying agents developed at home and abroad are modified with vegetable gum molecules to synthesize polymers with special functions. However,

Method used

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  • Efficient debris carrying agent Al2O3/SiO2 composite material suitable for water-based drilling fluid
  • Efficient debris carrying agent Al2O3/SiO2 composite material suitable for water-based drilling fluid
  • Efficient debris carrying agent Al2O3/SiO2 composite material suitable for water-based drilling fluid

Examples

Experimental program
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Example Embodiment

[0039] A second aspect of the invention provides an Al 2 O 3 / Sio 2 The preparation method of the composite, the method includes:

[0040] (1) The use of a silane coupling agent containing Al 2 O 3 SiO 2 Solid particles for surface modification;

[0041] (2) The product after the surface modification of step (1) is polymerized with the compound represented by the formula (1 ') and the formula (2');

[0042] Formula 1') Formula (2 ')

[0043] Among them, R 1 -R 6 Each independently selected from the alkyl group of H or C1-C6; L is selected from the group consisting of C0-C6 alkylene group; 7 The alkyl group selected from the group consisting of halogen substituted.

[0044] The above compounds are selected and ratio as described above.

[0045] In a preferred embodiment of the invention, the compound represented by the formula (1 ') is selected from the group consisting of acrylamide and / or methacrylamide; the compound represented by the formula (2') is selected from the group...

Example Embodiment

[0074] Example 5: equimolar amounts nonafluorohexyl acrylate instead of methyl acrylate perfluorooctyl acrylate, thirteen, after the entire reaction is the reaction product finally obtained crumbs carrying agent HEX-5.

Example Embodiment

[0075] Example 6: equimolar amount of methacrylic acid ester in place Heptadecafluorodecyl tridecafluorooctyl methacrylate, octyl acrylate, over the entire reaction is the reaction product finally obtained crumbs carrying agent HEX-6.

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Abstract

The invention relates to the field of oilfield chemistry in the petroleum industry, in particular to an efficient debris carrying agent Al2O3/SiO2 composite material suitable for water-based drilling fluid. The Al2O3/SiO2 composite material comprises solid particles containing Al2O3 and SiO2, and a polyacrylamide polymer modified on the surfaces of the solid particles, wherein the polyacrylamide polymer contains structural units as shown in a formula (1) and a formula (2). The Al2O3/SiO2 composite material can be used as an efficient debris carrying agent to effectively improve the surface wettability of rock debris and convert the hydrophilic and oleophylic wettability of the surface of the rock debris into hydrophobic and oleophobic gas wettability, so that the relative density of the rock debris is reduced, and meanwhile, the debris carrying effect of the system is improved through the rheological property of the polymer.

Description

technical field [0001] The invention relates to the field of oilfield chemistry in the petroleum industry, in particular to a high-efficiency debris-carrying agent Al suitable for water-based drilling fluids 2 o 3 / SiO 2 composite material. Background technique [0002] As the exploitation of conventional oilfields in my country has basically entered the middle and later stages, the reservoir conditions for exploration and development are becoming more and more harsh, and unconventional complex structure wells such as deep wells and horizontal wells have become more and more development methods for unconventional oil and gas fields. The development of complex structure wells puts forward higher requirements on the performance of drilling fluids. In view of the difficulty of carrying cuttings often encountered in the process of drilling high and difficult wells, it is easy to form cuttings beds in the downhole, which further leads to the increase of friction resistance and ...

Claims

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Application Information

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IPC IPC(8): C09K8/24C09K8/03C09K8/16C09K8/52C08F220/56C08F220/24
CPCC09K8/24C09K8/03C09K8/16C09K8/52C08F220/56C08F220/24
Inventor 蒋官澄倪晓骁彭春耀贺垠博杨丽丽骆小虎罗绪武梁兴谭宾冉启发刘小波程荣超全晓虎蔡军崔凯潇
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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