Emulsion mobility control agent and preparation method thereof

A technology of fluidity control agent and emulsion, which is applied in the field of emulsion fluidity control agent and its preparation, can solve the problems of poor compatibility, low temperature resistance and salt resistance, and achieve stable performance, strong regeneration ability and good long-term stability sexual effect

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the existing surfactant fluidity control system, such as low temperature resistance and salt resistance, poor compatibility, etc., and then provide an emulsion fluidity control agent

Method used

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  • Emulsion mobility control agent and preparation method thereof
  • Emulsion mobility control agent and preparation method thereof
  • Emulsion mobility control agent and preparation method thereof

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Embodiment 1

[0029] Mix the mass concentration of 30% coconut acid diethanolamide and 10% cocamidopropyl betaine into a high-temperature glass reaction kettle, heat up to 40°C, stir evenly at 200r / min, then add 9% ethanol Continue to stir for 30 minutes, then add 1% isopropanol, then slowly add the remaining amount of deionized water in batches, and stir evenly to obtain an emulsion fluidity control agent with an active substance content of 40% and a pH value of 7-9. The product It is yellow homogeneous liquid.

[0030] The total salinity of the emulsion fluidity control agent that embodiment 1 obtains is 18 * 10 4 mg / L Zhongyuan Pucheng oil field injection water, the total salinity is 20×10 4 mg / L of on-site produced water was prepared into a solution with a concentration of 0.6wt%-3wt% as the water phase, and the 2+3 crude oil on Shaer 2+3 in West Pucheng District was used as the oil phase. After mixing according to different oil-water ratios of 1:9 and 3:7, the airtight Put it in a co...

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Abstract

The invention relates to an emulsion mobility control agent and a preparation method thereof, and belongs to the technical field of oilfield chemicals. The emulsion mobility control agent is a composition prepared from alkanolamide, a betaine zwitterionic surfactant, a cosurfactant and deionized water; and the preparation method comprises the following steps: mixing alkanolamide with the betaine zwitterionic surfactant, and adding the mixture to a high-temperature glass reaction kettle; heating to 35-45 DEG C, and stirring evenly; and adding the cosurfactant, further stirring for 30 minutes, slowly adding the deionized water separately, and stirring evenly, so as to obtain the emulsion mobility control agent. According to the emulsion mobility control agent provided by the invention, the temperature resistance is 110 DEG C; the salinity tolerance is 20*10<4> (4,000mg/L of Ca<2+> and 1,000mg/L of Mg<2+>); and the emulsion mobility control agent has good long-term stability at different reservoir temperatures, and can be applied to high-temperature and high-salinity reservoir conditions.

Description

technical field [0001] The invention provides a fluidity control agent for oilfield tertiary oil recovery and a preparation method thereof, in particular to an emulsion fluidity control agent and a preparation method thereof, belonging to the technical field of oilfield chemicals. Background technique [0002] For water injection development oilfields, when the oilfield enters the late stage of high water cut development, more than 60% of the crude oil remains in the rock pores of the reservoir after primary oil recovery and secondary oil recovery, and conventional water flooding will continue to be used to enhance recovery The difficulty is relatively high, and various oilfields have successively carried out tertiary oil recovery technologies such as polymer flooding, surfactant and compound flooding, etc., and have achieved good potential tapping effects. However, the chemical flooding of polymers in high-temperature and high-salt reservoirs is very limited. With the succe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 李晓东张国萍吴信荣陈宗林杨昌华李遵照刘明霞薛永新万龙
Owner CHINA PETROLEUM & CHEM CORP
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