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High-temperature resistant assistant steam expelling foaming agent

A technology for assisting steam and foaming agents, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., and can solve the problems that foaming agents cannot meet high temperature resistance, fluorine-containing surfactants are extremely expensive, and are difficult to popularize and use. , to achieve the effects of improving the development effect, good plugging and profile control ability, and increasing the displacement volume

Active Publication Date: 2018-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many types of foam agents currently used for auxiliary steam flooding, but the foam agents used in thermal recovery of heavy oil require that they cannot be decomposed in the temperature range of 250-300°C, and general foam agents cannot meet the requirements of high temperature resistance
Fluorine-containing surfactants with good temperature resistance are extremely expensive and difficult to promote and use

Method used

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  • High-temperature resistant assistant steam expelling foaming agent

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1 A kind of high temperature resistant auxiliary steam flooding foaming agent

[0020] The ingredients and their parts by weight are: 8 parts of foaming agent, 22 parts of foam stabilizer and 70 parts of water;

[0021] Blowing agent is the product of the reaction of N-dodecyl polyethylene and butylene ether polymer sodium tetradecylsulfonate, and the structural formula obtained is shown in (I):

[0022]

[0023] In the described blowing agent structural formula (I), R is dodecyl, m is 3, n is 22, R' is tetradecyl, and M is sodium ion;

[0024] The foam stabilizer is polyacrylamide.

Embodiment 2

[0025] Embodiment 2 A kind of high temperature resistant auxiliary steam flooding foaming agent

[0026] The ingredients and parts by weight are: 5 parts of foaming agent, 30 parts of foam stabilizer and 60 parts of water;

[0027] Blowing agent is the product of the reaction of N-heptyl polyethylene and butylene ether polymer sodium octadecylsulfonate, and the structural formula obtained is similar to the blowing agent structural formula in Example 1; wherein R is a heptyl group, m is 2, n is 35, R' is octadecyl, and M is a potassium ion;

[0028] Described foam stabilizer is polyvinyl alcohol.

Embodiment 3

[0029] Embodiment 3 A kind of high temperature resistant auxiliary steam flooding foaming agent

[0030] The ingredients and their parts by weight are: 10 parts of foaming agent, 10 parts of foam stabilizer and 85 parts of water;

[0031] Blowing agent is the product of the reaction of N-octadecyl polyethylene and butylene ether polymer sodium decanyl sulfonate, and the structural formula obtained is similar to the blowing agent structural formula in Example 1; wherein R is octadecyl , m is 4, n is 10, R' is a decanyl group, and M is an ammonium ion;

[0032] The foam stabilizer is an alkanolamide.

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Abstract

The invention belongs to the technical field of oil recovery and in particular relates to a high-temperature resistant assistant steam expelling foaming agent which comprises the following componentsin parts by weight: 5-10 parts of a foaming agent, 10-30 parts of a foam stabilizer and 60-85 parts of water, wherein the foaming agent is amino-containing polyether sulfonate. The high-temperature resistant assistant steam expelling foaming agent provided by the invention is high in foaming property and high in stability, and 300-DEG C temperature resistant tests show that the foaming agent is stable in chemical property, in addition, the foaming agent is high in sealing profile control property, and under a condition of residual oil, a sealing profile control function can be still achieved,the expelling area can be effectively increased, sweeping areas can be increased, the oil reservoir exploration effect is improved, and the oil recovery rate is increased.

Description

technical field [0001] The invention belongs to the technical field of thermal oil recovery, and in particular relates to a high-temperature-resistant foaming agent for auxiliary steam flooding. Background technique [0002] my country has abundant heavy oil reserves, but its density and viscosity are relatively high, making it difficult to exploit. At present, the main method of heavy oil development in oilfields is steam injection thermal recovery, and steam stimulation is the main method. After multiple rounds of stimulation, it must be switched to steam flooding in due course. However, the ineffective channeling of steam in the low residual oil saturation zone seriously affects the development effect of steam stimulation and steam flooding. The affected area of ​​the steam. [0003] At present, oil recovery practice at home and abroad has proved that nitrogen injection and high temperature foam system in steam can increase the swept area of ​​injected steam, improve di...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/506C09K8/518C09K8/592
CPCC09K8/506C09K8/518C09K8/584C09K8/592
Inventor 孙业恒王胜许坚吴光焕邓宏伟孙宝泉唐亮于春磊贾丽华张礼臻王俊刘妍卿
Owner CHINA PETROLEUM & CHEM CORP
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