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Novel viscosity reducer for viscous oil

A heavy oil viscosity reducer and technology of viscosity reducer, applied in the field of heavy oil viscosity reducer, can solve the problems of high economic cost, complicated operation, insufficient viscosity reduction performance, etc., and achieve good viscosity reduction effect, environmental protection and low price Effect

Inactive Publication Date: 2014-10-29
黄爱先
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesized oil-soluble viscosity reducer is mainly based on polymer copolymers, but there are generally deficiencies such as insufficient viscosity reduction performance, high economic cost, and cumbersome operation.

Method used

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  • Novel viscosity reducer for viscous oil
  • Novel viscosity reducer for viscous oil
  • Novel viscosity reducer for viscous oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The specific preparation method of heavy oil viscosity reducer of the present invention:

[0023] 1. The synthetic method of polyoxyethylene lauryl ether sulfonate III:

[0024] According to the prior art, it is mainly divided into four steps: first, polyoxyethylene lauryl ether and epichlorohydrin are reacted to obtain product I; in the second step, product I is reacted with NaOH to obtain product II; in the third step, Product II and sodium bisulfite carry out sulfonation reaction, obtain product lauryl alcohol polyoxyethylene ether sulfonate III:

[0025]

[0026] 2. The demulsifiers described in the present invention are ethylene bis (tetradecyl dimethyl ammonium chloride), propylene bis (dodecyl polyoxyethylene ammonium chloride), propylene bis (Dedecylpolyoxyethylene / Polyoxypropylene Chloride / Ammonium Bromide), Ethylene[(Octaamidopropyl Dimethyl / Myristamidopropyl Dimethyl) Chloride / Ammonium Bromide], Butyl One or more of olefinic acid diethylenyl bis(octyldim...

Embodiment 2

[0036] According to the technical scheme of the present invention, the heavy oil viscosity reducer prepared in the present invention is mainly used for heavy oil huff and puff cold recovery, and the specific implementation steps are as follows:

[0037] 1. According to the condition of the oil well, the heavy oil viscosity reducer prepared by the present invention is injected into the formation with a high-pressure pump.

[0038] 2. After the construction is completed, the viscosity of underground crude oil decreases, and oil production can begin.

[0039] 3. After a period of mining, the viscosity of crude oil increases, and it is difficult to recover crude oil. Repeat step 1.

[0040] Repeatedly realize heavy oil huff and puff cold recovery.

Embodiment 3

[0042] Through the heavy oil samples collected on-site in each oil production area of ​​Shengli Oilfield, the heavy oil viscosity reducer prepared by the present invention is used to carry out the viscosity reduction test on the collected heavy oil samples, and the results show that the heavy oil viscosity reducer prepared by the present invention Remarkable viscosity reduction effect.

[0043] Table 1 Viscous reduction effect data of viscous oil viscosity reducer prepared according to the present invention

[0044]

[0045]

[0046] The experimental results of the present invention show that the thick oil viscosity reducer prepared by the present invention can adapt to the viscosity reduction of various heavy oils and has obvious effect, and greatly improves the viscosity reduction rate of heavy oil.

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Abstract

The invention relates to a novel viscosity reducer for viscous oil, and the novel viscosity reducer is a chemical agent mainly used for viscosity reduction and cold production of viscous oil. The viscosity reducer disclosed by the invention has the advantages of convenience in construction, high viscosity reduction rate, low price and the like. Laboratory tests and field applications show that the viscosity reducer disclosed by the invention is applicable to conventional (borehole) viscosity reduction mining, oil layer viscosity reduction and the like of a viscous oil well and can be used for solving the problem of the oil layer blockage at an immediate vicinity of a wellbore caused by large viscosity of crude oil or micro-emulsion. In summary, the viscosity reducer is wide in applicable range and significant in effect and can adapt to the viscosity reduction of various viscous oil.

Description

technical field [0001] The invention relates to a novel heavy oil viscosity reducer, which belongs to the field of oil field chemistry. Background technique [0002] With the increase of heavy oil production, its characteristics of high density, high viscosity and poor fluidity have brought great difficulties to the production of oilfields and the transportation of crude oil. According to the analysis of the internal composition of the heavy oil family, it is rich in ammonia nitrogen compounds, such as colloids, asphaltenes and other macromolecular groups, which are easily connected and aggregated, resulting in a sharp increase in system viscosity and poor fluidity. Due to the difficulty in mining heavy oil and the low recovery rate, it is necessary to choose different extraction methods according to the formation conditions and the properties of heavy oil during the extraction process. Commonly used mining methods include thermal mining, thin oil blending, and chemical vis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 黄爱先
Owner 黄爱先
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