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Foaming agent composition and purpose thereof

A technology of composition and foaming agent, which is applied in the direction of drilling composition, production fluid, wellbore/well parts, etc., can solve the problems of poor thermal stability of foaming agent and cannot meet the needs, and achieve the effect of improving salt resistance

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that the thermal stability of the foam agent in the prior art is poor, and it cannot meet the needs of foam flooding in high-temperature and high-salinity formations due to the precipitation of divalent ions. A new foam agent combination is provided. thing

Method used

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  • Foaming agent composition and purpose thereof
  • Foaming agent composition and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 93g (0.5 mole) dodecyl alcohol and the calcium oxide catalyst of alcohol weight 1% in the reactor that condensing device, stirring device and gas disperser are housed, when heating to 135 ℃ while flowing nitrogen, add 8g water , and stirred for 1 hour. Then first distilled water at normal pressure, then decompressed under 20 mm Hg vacuum, evaporated moisture at 140 DEG C in vacuum for 20 minutes, cooled the solution to 80 DEG C, slowly added dropwise neutralizing catalyst theoretical acid amount of 20% by weight concentrated sulfuric acid. Heat the system temperature to 80-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then use nitrogen to blow 3-4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C Enter 155 grams of oxirane, control pressure<0.60MPa to carry out alkoxylation reaction; Obtain lauryl alcohol polyoxyethylene (7) ether.

[0026] (2) 240g (0.5 mole) of polyoxyethylene laury...

Embodiment 2

[0034] Get the foaming agent composition in [Example 1] and put it into a pressure bomb, put it into an oven and age it at 150°C for 10 days, take it out, and measure the foaming ability and foam of the composition after aging under the condition of 85°C water bath by Roche method The results of the half-life measured by the scanner are shown in Table 3.

[0035] table 3

[0036] X(weight)%

Embodiment 3

[0038] Get the foam composition lauryl alcohol polyoxyethylene (7) ether sodium benzene sulfonate 0.5 (weight)% in [Example 1], α-olefin sulfonate AOS 14160.1 (weight)% to carry out the plugging performance evaluation test, the quartz sand fills the core tube with a permeability of 4D, injects the aqueous solution of the foam agent composition into the sand tube at a speed of 2mL / min, and simultaneously presses in nitrogen gas at a speed of 9mL / min to measure the plugging performance. The plugging pressure difference is 1.55MPa, and the calculated resistance factor is 38.8.

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Abstract

The invention relates to a foaming agent composition and purpose thereof and mainly solves problems of a foaming agent in a prior foam flooding reinforcement oil extraction technology, such as weak stability, deposition with divalent ion and incapability of satisfying demands of foam flooding on stratum with high temperature and high mineralization. According to the invention, a technical scheme well solves the problems by employing a foaming agent composition containing fatty alcohol polyoxyethylene ether benzene sulfonate, alpha-alkene sulfonate and water and can be used in tertiary oil recovery foam flooding.

Description

technical field [0001] The present invention relates to a foam composition and its application. Background technique [0002] The main oilfields in my country have entered a high water cut period after primary and secondary recovery. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among new technologies for tertiary oil recovery, chemical composite flooding is still one of the most promising methods. The oil displacement mechanism is mainly that the polymer or glue increases the viscosity of the displacement water, reduces the oil-water mobility ratio, alleviates the channeling phenomenon, and improves the sweep efficiency; surfactants and alkalis reduce the oil / water interfacial tension, increase the capillary number, and promote Crude oil is desorbed and effectively dispersed from rocks to effectively drive residual oil, t...

Claims

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Application Information

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IPC IPC(8): C09K8/594C09K8/584E21B43/22
Inventor 何秀娟张卫东李应成沙鸥
Owner CHINA PETROLEUM & CHEM CORP
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