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Preparation method of suspension liquid desulfurization agent for water-based oil testing well completion fluid system

A well fluid system and suspension technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of uneven dispersion, high surface energy, large specific surface area, etc., and achieve good stability , good rheology and high sulfur removal efficiency

Active Publication Date: 2018-11-23
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large specific surface area and high surface energy of the nano-scale solid desulfurizer, it is prone to agglomeration and uneven dispersion in the solution, and it is more likely to react with the treatment agent in the completion fluid system under high temperature conditions. Rheology is seriously affected, and pure nano-scale solid desulfurizers cannot be applied in high-temperature completion fluid systems

Method used

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  • Preparation method of suspension liquid desulfurization agent for water-based oil testing well completion fluid system
  • Preparation method of suspension liquid desulfurization agent for water-based oil testing well completion fluid system
  • Preparation method of suspension liquid desulfurization agent for water-based oil testing well completion fluid system

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Embodiment 1

[0027] As the best embodiment of the present invention, its components and proportioning are as follows:

[0028] (1) Formula composition: 60g of isopropyl titanate triisostearate, 10g of alkylphenol polyoxyethylene ether, 20g of sodium polyacrylate, 200g of nano-zinc oxide, 100g of isopropanol, and 610g of pure water.

[0029] (2) Preparation method: Add the surface modifier into isopropanol in container A, heat to 60-80°C, and stir to form a uniform solution. Add the dispersant, emulsifier, and nanopowder into the aqueous solution with a pH value of 9-10 in the B container, heat to 60-80°C, and stir to form a uniform solution. Under rapid stirring, add the uniform solution formed in container A into container B, stir for 2 hours to form a uniformly dispersed slurry, and cool to room temperature.

[0030] (3) The sulfur removal efficiency of sulfur removal agent 1# and the effect of high temperature on the rheology of the completion fluid system are shown in the table below,...

Embodiment 2

[0033] As the best embodiment of the present invention, its components and proportioning are as follows:

[0034] (1) Formula composition: 60g of isopropyl tris(dioctyl phosphate acyloxy) titanate, 10g of natural phenol polyoxyethylene ether, 20g of polycarboxylate sodium salt, 200g of nano zinc oxide powder, 100g of isopropanol , 610g of pure water.

[0035] (2) Preparation method: Add the surface modifier into isopropanol in container A, heat to 60-80°C, and stir to form a uniform solution. Add the dispersant, emulsifier, and nanopowder into the aqueous solution with a pH value of 9-10 in the B container, heat to 60-80°C, and stir to form a uniform solution. Under rapid stirring, add the uniform solution formed in container A into container B, stir for 2 hours to form a uniformly dispersed slurry, and cool to room temperature.

[0036] (3) The sulfur removal efficiency of sulfur removal agent 2# and the effect of high temperature on the rheology of the completion fluid sys...

Embodiment 3

[0039] As the best embodiment of the present invention, its components and proportioning are as follows:

[0040] (1) Formula composition: γ-methacryloxypropyltrimethoxysilane 60g, alkylphenol polyoxyethylene ether 5g, OP-10 5g, polyvinylpyrrolidone 30g, nano-zinc oxide powder 300g, isopropyl Alcohol 100g, pure water 500g.

[0041] (2) Preparation method: Add the surface modifier into isopropanol in container A, heat to 60-80°C, and stir to form a uniform solution. Add the dispersant, emulsifier, and nanopowder into the aqueous solution with a pH value of 9-10 in the B container, heat to 60-80°C, and stir to form a uniform solution. Under rapid stirring, add the uniform solution formed in container A into container B, stir for 2 hours to form a uniformly dispersed slurry, and cool to room temperature.

[0042] (3) The sulfur removal efficiency of sulfur removal agent 3# and the effect of high temperature on the rheology of the completion fluid system are shown in the table b...

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Abstract

The invention discloses a preparation method of a suspension liquid desulfurization agent for a water-based oil testing well completion fluid system. The suspension liquid desulfurization agent is prepared from the following raw materials in parts by weight: 5 to 8 parts of a surface modifying agent, 0.8 to 1 part of an emulsifier, 1 to 3 percent of a dispersant and 10 to 30 parts of nano-powder;the preparation method comprises the following steps: adding the surface modifying agent into isopropyl alcohol in a container A; heating to 60 to 80 DEG C and stirring to form a uniform solution; adding the dispersant, the emulsifier and the nano-powder into a water solution with the pH (Potential of Hydrogen) of 9 to 10 in a container B; heating to 60 to 80 DEG C and stirring to form a uniform solution; under the action of rapid stirring, adding the uniform solution formed in the container A into the container B and stirring for 2h to form slurry which is uniformly dispersed; cooling to roomtemperature. According to the preparation method disclosed by the invention, the desulfurization agent and a well completion fluid system treatment agent are not gathered and consolidated under a high-temperature condition of 180 DEG C; the desulfurization agent does not influence the rheological property and sedimentation stability of the well completion fluid system under the high-temperature condition, and the aim of high desulfurization efficiency is realized.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling oil and gas field chemistry, in particular to a preparation method of a suspension desulfurizer for a water-based oil testing completion fluid system. Background technique [0002] With the rapid advancement of natural gas exploration and development, there are more and more high-temperature and high-pressure oil and gas wells, deep wells and ultra-deep wells, and hydrogen sulfide-corroded gas wells. , high reservoir temperature, and high concentration of hydrogen sulfide pollution have all become difficulties in the safe production of this type of gas well. Aiming at the problem of hydrogen sulfide pollution, the main method currently adopted is to add a certain amount of desulfurizer to the completion fluid system to prevent and remove hydrogen sulfide pollution in the reservoir. [0003] Currently, conventional desulfurizers include solid desulfurizers and liquid desulfurizers. Sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/54
CPCC09K8/54C09K2208/32
Inventor 王星媛王参书舒小波刘翔曾婷王娟
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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