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Organic silicon fluid loss additive and preparation method thereof

A technology of fluid loss reducer and organic silicon, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as oil and gas layer damage, wellbore instability, etc., and achieve improved potential, ideal high temperature resistance, strong Adsorptive effect

Inactive Publication Date: 2013-06-19
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the invasion of drilling fluid into the formation will cause the shale to hydrate and expand, and in severe cases, it will lead to instability of the wellbore and damage to oil and gas formations

Method used

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  • Organic silicon fluid loss additive and preparation method thereof
  • Organic silicon fluid loss additive and preparation method thereof
  • Organic silicon fluid loss additive and preparation method thereof

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preparation example Construction

[0036] This embodiment also provides a preparation method for the above-mentioned polymer-type silicone fluid loss reducer, which includes the following steps in sequence: dissolving a certain amount of alkenyl sulfonic acid in a solvent, neutralizing with alkali to pH=6-8, and then drying The corresponding alkenyl sulfonate can also be used directly without neutralization. While stirring, add alkenyl sulfonic acid (or corresponding alkenyl sulfonate), alkenyl amide and alkenyl alkanone in sequence, heat up to the reaction temperature of 40°C to 130°C, pass N 2 After 30 minutes the alkenylsilane was added. Add an initiator, keep the reaction temperature at 40°C to 130°C, and react for 1 to 12 hours to obtain a jelly which is the silicone fluid loss additive.

[0037] This polymerization reaction formula has four kinds of monomers participating in the free radical polymerization reaction, which follows the general law of free radical polymerization reaction. Free radical poly...

Embodiment 1

[0048] Fix the three-necked flask on a heating device, install a stirrer and a reflux condenser, add 200mL N,N-dimethylformamide, add 10.36g of 2-acrylamido-2-methylpropanesulfonic acid to dissolve it, and stir Add 10.66g of acrylamide and 5.56g of N-vinylpyrrolidone in sequence, raise the temperature to 80°C, pass N 2 After 30 minutes, 1.38 g of γ-(acrylamido)propyltriethoxysilane was added dropwise. Add 0.07 g of benzoyl peroxide, keep the reaction temperature at 80° C., and react for 5 hours to obtain a colorless gum. Continue to react for 10 hours to obtain the organosilicon fluid loss product.

Embodiment 2

[0050] Evaluation of temperature resistance and fluid loss reduction effect

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Abstract

The invention discloses an organic silicon fluid loss additive and a preparation method thereof. The method comprises the following steps of: mixing alkenyl sulfonic acid or alkenyl sulphonate, alkenyl amide and alkenyl azululanone, stirring and heating; introducing N2 and then adding alkenyl silane; and adding an initiating agent into the mixed solution of the alkenyl sulfonic acid or alkenyl sulphonate, the alkenyl amide, the alkenyl azululanone and the alkenyl silane to react so as to generate a jelly namely the organic silicon fluid loss additive. The fluid loss additive provided by the invention has perfect high-temperature resistance and has strong adsorbability on a clay surface at a high temperature, so the electric potential of clay zeta is improved and a formed clay cake is thin, compact and tough; besides, the fluid loss additive has a good de-filtration effect in fresh water, 4.0wt% brine and saturated brine drilling fluid.

Description

technical field [0001] The invention relates to an organic silicon fluid loss reducer, in particular to a temperature-resistant and salt-resistant polymer type organic silicon fluid loss reducer for drilling fluid and a preparation method thereof. Background technique [0002] Ultra-deep well drilling technology is an indispensable key technology for the exploration and development of deep oil and gas resources, and has become a symbol representing the development level of drilling engineering technology. The performance of the matching high-temperature drilling fluid is directly related to deep and ultra-deep wells Drilling quality, drilling cost and drilling cycle. For high temperature resistant drilling fluid, controlling the fluid loss of drilling fluid at high temperature has become one of the main factors restricting the development of drilling fluid technology. Therefore, the development of drilling fluid fluid loss reducer suitable for high temperature has become th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C08F220/56C08F220/58C08F226/10C08F230/08
Inventor 褚奇罗平亚
Owner SOUTHWEST PETROLEUM UNIV
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