Preparation method of depolymerized and dispersed viscosity reducer of heavy oil

A viscosity reducing agent and depolymerization technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of limited degree of viscosity reduction and pour point reduction, disappearance, and reducing the application value of chemical viscosity reduction technology.

Inactive Publication Date: 2009-10-21
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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Problems solved by technology

Although oil-soluble chemical viscosity reduction technology can inhibit or disperse wax crystals, colloidal flakes, and asphaltene layers, it cannot make them disappear. It is a "palliative" rather than a "permanent" method, so the degree of viscosity reduction is li

Method used

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  • Preparation method of depolymerized and dispersed viscosity reducer of heavy oil
  • Preparation method of depolymerized and dispersed viscosity reducer of heavy oil
  • Preparation method of depolymerized and dispersed viscosity reducer of heavy oil

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preparation example Construction

[0019] A preparation method for a thick oil depolymerization dispersion viscosity reducer, which is actually a preparation method for a water-soluble cationic polymer, including selecting octadecyldimethyl tertiary amine as a hydrophobic group monomer, diethylene Triamine, epichlorohydrin, and benzyl chloride are hydrophilic group monomers, and ethanol is used as a solvent. It is characterized in that the sequence of specific steps is as follows:

[0020] (1) Add 0.35mol to 0.45mol of octadecyldimethyl tertiary amine and 0.7mol of ethanol into a reaction vessel with a stirring device, and mix it into a homogeneous solution at a stirring speed of 200r / min-400r / min, Place in a constant temperature jacket at 50°C to 70°C for 0.5 hours;

[0021] (2) Slowly add 0.30 mol to 0.45 mol of epichlorohydrin into the reaction vessel at a rate of 5.0 ml / min to 20 ml / min with a dropping funnel, and after the addition is completed, the temperature of the reaction solution is raised to 70°C-7...

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Abstract

The invention discloses a preparation method of a depolymerized and dispersed viscosity reducer of heavy oil. The preparation method comprises selecting N,N-Dimethyloctadecylamine as a hydrophobic group monomer, and diethylene triamine, epoxy chloropropane and benzyl chloride as hydrophilic group monomers, and ethanol as a solvent. The preparation method sequentially comprises the following steps: (1) adding the N,N-Dimethyloctadecylamine (N,N-Dimethylhexadecylamine) and the ethanol to a reaction vessel with a stirring device, evenly mixing and keeping the mixture at constant temperature for 0.5h; (2) slowly dripping the epoxy chloropropane with a dropping funnel to the reaction vessel, heating to 70 DEG C-75 DEG C, and reacting for 1-4h to generate HDI-1; (3) dripping the epoxy chloropropane to the diethylene triamine at room temperature to generate HDI-2; (4) allowing reaction products in (3) and (2) to react to generate HDI-3; and (5) dripping the benzyl chloride with the dropping funnel to the HDI-3, evenly stirring the mixture, and reacting at increased temperature of 90-95 DEG C for 2-5h to obtain the target product HD.

Description

1. Technical field [0001] The invention relates to a preparation method of a heavy oil viscosity reducer in petroleum exploitation, in particular to a preparation method of a heavy oil depolymerization dispersion viscosity reducer. 2. Background technology [0002] Oil-soluble viscosity reducer and dispersion viscosity reducer are the primary methods to solve the fluidity of ultra-heavy oil. At present, high polymer oil-soluble viscosity reducers have been widely used. Most oil-soluble viscosity reducers mix high polymers with solvents to reduce the viscosity of super heavy oil. Asphaltene and asphaltenes have different molecular structures and molecular sizes, and the oil-soluble viscosity reducer has strong selectivity. Although oil-soluble chemical viscosity reduction technology can inhibit or disperse wax crystals, colloidal flakes, and asphaltene layers, it cannot make them disappear. It is a "palliative" rather than a "permanent" method, so the degree of viscosity red...

Claims

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Application Information

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IPC IPC(8): C09K8/588C08G59/14C08G59/10
Inventor 王世虎孙克已王秋霞麻金海马爱青盖平原
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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