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Accessory ingredient for viscous crude oil exploitation, its preparation and application

A technology of heavy oil and additives, applied in the direction of chemical instruments and methods, drilling compositions, etc.

Inactive Publication Date: 2006-04-05
天津市慧珍科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a viscosity-reducing additive for heavy oil production. Although the problem of viscosity reduction in oil production has been improved, it still needs to be injected with high-pressure steam to complete the production.

Method used

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  • Accessory ingredient for viscous crude oil exploitation, its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: (see figure) a kind of heavy oil recovery aid is characterized in that its formula and content are: amphoteric surfactant 10%, polyethylene polyamine block polyether 8%, phenolic resin block polyether 10%, low molecular alcohol polyether 4%, penetrant 5%, sodium lignin 8% and water 55%.

[0016] A preparation method of the above-mentioned heavy oil production aid is characterized in that it is composed of the following steps:

[0017] (1) 10% of the above-mentioned amphoteric surfactant, 8% of polyethylene polyamine block polyether, 10% of phenolic resin block polyether and 8% of sodium lignin are put into a stirred tank, mixed and heated to 80°C, Stir until all are melted;

[0018] (2) Add 4% low-molecular alcohol polyether, 5% penetrant and 55% water to (1) and stir evenly;

[0019] (3) In (2), use the regulator citric acid to adjust the pH to 8-9, cool down to 30°C, and fill it into barrels, which is the finished product.

[0020] An application of t...

Embodiment 2

[0029] Embodiment 2: the application of the product obtained by the aforementioned method is characterized in that the above-mentioned prepared recovery aid is used for heavy oil recovery and oil well plugging removal.

[0030] Add 2% of the above-mentioned heavy oil recovery aid to 98% water to prepare an aqueous solution, and inject it into the ground at a temperature of 50-60° C. for heavy oil recovery.

[0031] Its construction process is as follows:

[0032] Firstly, select the wells that have sufficient energy in the formation and are difficult to produce due to thick oil and heavy organic deposits that cause clogging of the oil layer. The treatment fluid depends on the damage radius and degree of the oil layer, but the general treatment radius is 1-1.5m and the treatment fluid dosage is:

[0033] V=∏R 2 φh

[0034] In the formula: V-treatment liquid consumption m 3

[0035] R-treatment radius m

[0036] φ-porosity %

[0037] h-effective th...

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Abstract

The invention relates to auxiliary agent for exploiting thick oil with formula as: 10-15% amphoteric surfactant, 5-10% polyvinyl polyamine block polyether, 12-15% phenolic resin block polyether, 5-10% low-molecular alcohol polyether, 5-8% penetrant, 5-10% lignin sodium, and 32-58% water. This product can reduce viscosity thousand times to replace high-pressure steaming exploit and save cost.

Description

(1) Technical field: [0001] The invention belongs to the field of petroleum exploitation chemistry, and in particular relates to an auxiliary agent for reducing viscosity in petroleum exploitation, a preparation method and application thereof. (two) background technology: [0002] Before the present invention, in order to solve the problem that heavy heavy oil has high density, high viscosity, high colloidal bitumen, and poor fluidity, resulting in blockage of heavy oil and unable to be mined, high temperature and high pressure steam was usually used for thermal recovery. However, this method requires large investment, high cost, and long steam injection cycle, especially for heavy oil wells with poor cementing quality, which cannot be produced by gas injection. In order to solve this problem, relevant experts at home and abroad are devoting themselves to the research of chemical huff and puff oil recovery technology, which is carried out in the way of cold recovery, that is...

Claims

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Application Information

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IPC IPC(8): C09K8/588
Inventor 武长安魏秀珍
Owner 天津市慧珍科技有限公司
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