Superheavy oil crude oil reverse-phase demulsifier preparation method

A reversed-phase demulsifier and super-heavy oil technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of high viscosity and high density of heavy oil, and achieve the requirements of low equipment requirements, simple operation and good demulsification effect. Effect

Inactive Publication Date: 2015-04-01
TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high viscosity and high density of heavy oil, it is difficult to exploit conventional methods. At present, thermal oil recovery methods such as steam huff and puff and steam flooding are the most important extraction methods. However, due to the increasing water content of crude oil and steam injection production , the process of ultra-heavy oil production is accompanied by a large amount of highly emulsified high-temperature oily sewage, which has become a major problem in oilfield production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: the preparation of a kind of compound type inverse demulsifier, concrete operating steps are:

[0014] 1. Synthesis of multi-segment polyquaternary ammonium salts: Add starter glycerin and catalyst boron trifluoride ether solution into a three-necked flask equipped with an electric stirring rod, condenser tube and dropping funnel, turn on the electric stirring rod, and control temperature at 50°C, add epichlorohydrin drop by drop, after the dropwise addition, raise the temperature to 70°C and keep it warm for 4 hours to obtain brown multi-chain chlorinated polyether; add chlorinated polyether and triethyl Amine aqueous solution, ensure the equivalent of chlorine and amino group, pass nitrogen gas, raise the temperature to 70°C, keep stirring for 3 hours, and finally raise the temperature to 125°C to continue the reaction to obtain reddish-brown multi-segment cationic polyquaternary ammonium salt.

[0015] 2. Synthesis of dendritic polyamide-amine: under th...

Embodiment 2

[0017] Embodiment 2: the preparation of a kind of compound type inverse demulsifier, concrete operating steps are:

[0018] 1. The synthesis of multi-segment polyquaternium salt is the same as in Example 1.

[0019] 2. The synthesis of dendritic polyamide-amine is the same as in Example 1.

[0020] 3. Preparation of composite demulsifier: The synthesized polyquaternium salt, 3.0-generation polyamide-amine, polyaluminum chloride and ethanol are prepared into a water-soluble solution in an appropriate proportion to obtain a composite reverse demulsifier. The mass fraction ratio of polyquaternary ammonium salt, 3.0-generation polyamidoamine, polyaluminum chloride and solvent is 15:15:10:300.

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Abstract

The invention provides a superheavy oil crude oil reverse-phase demulsifier preparation method characterized in that: epoxy chloropropane, glycerol and trimethylamine and the like are used as raw materials for preparation of multi segment poly quaternary ammonium salt, methyl acrylate and ethylenediamine are used as raw materials for preparation of 3.0 generation polyamidoamine-amine, and a water-soluble solution, namely a composite type reverse-phase demulsifier is prepared from the poly quaternary ammonium salt, the 3.0 generation polyamidoamine-amine, polymeric aluminium and a solvent according to the mass fraction ratio of (10-30): (10-40): (1-20): (100-500). The reverse-phase demulsifier prepared by the method has good demulsification effect on crude oil exploited from an oil field, and is a reverse-phase demulsifier suitable for chemical flooding produced liquid, and the preparation method provided by the invention has the advantages of simple operation, low requirement on equipment, wide application range and reduces the cost of crude oil exploitation.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a method for preparing an inverse demulsifier for ultra-heavy crude oil. Background technique [0002] Oil and gas pipeline gathering and transportation is an important link in the development process of oil and gas fields in the oil and gas industry. In order to solve the problems in the process of oil and gas gathering and transportation, a large amount of chemical agents must be used. The chemicals used in the process of oil and gas gathering and transportation are called oil and gas gathering and transportation Chemicals, which mainly include demulsifiers, corrosion inhibitors, drag reducers, emulsifiers, etc. The chemical agent that can demulsify and dehydrate emulsified crude oil is called crude oil demulsifier super. Due to the high viscosity and high density of heavy oil, it is difficult to exploit conventional methods. At present, thermal oil recovery methods such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 胡玉国梁海臣李靖张冠洲张有强张凤跃肖劲松孙红桃李东
Owner TIANJIN DAGANG OILFIELD BINGANG GRP BOHONG PETROLEUM CHEM
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