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Air-foam rare earth-base gel and preparation method thereof

A rare earth-based, water-based gel technology, applied in the field of foam gel, can solve the problems of large-scale industrial applications that are difficult to stabilize, and achieve the effects of low production cost, good shear resistance, and strong stability

Active Publication Date: 2012-08-01
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is mainly affected by the industrial gas source and the stability of the foam gel, so it is difficult to apply it on a large scale

Method used

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  • Air-foam rare earth-base gel and preparation method thereof
  • Air-foam rare earth-base gel and preparation method thereof
  • Air-foam rare earth-base gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, preparation air-foam rare earth base gel

[0032] Dissolve 0.1g of partially hydrolyzed polyacrylamide and 0.03g of rare earth type water-based gel crosslinking agent (RL) in 100g of water to obtain solution a, wherein the mass-number ratio of partially hydrolyzed polyacrylamide, RL and water is 0.1:0.03 : 100, stirring 90min at a stirring speed of 450r / min; adding 0.08g sodium dodecylbenzenesulfonate to the above solution a to obtain solution b, wherein the ratio of sodium dodecylbenzenesulfonate to water in parts by mass 0.08:100, stirring at a stirring speed of 450r / min for 10min; feed 380mL of air into the above-mentioned solution b, wherein the ratio of volume and fraction of the air fed into solution b is 3.8:1, and stir in a high-speed mixer at 30000r / min min under stirring for 3 min to obtain the air-foam rare earth-based gel.

[0033] The foam half-life of the air-foam rare earth-based gel prepared in this example is 42 hours, and the apparent vi...

Embodiment 2

[0034] Embodiment 2, preparation air-foam rare earth base gel

[0035] 0.12g of amphiphilic polymer, 0.05g of rare earth type water-based gel crosslinking agent (RL) was dissolved in 98g of water to obtain solution a, wherein the mass-number ratio of amphiphilic polymer, RL and water was 0.12:0.05:98 , stirring at a stirring speed of 500r / min for 120min; adding 0.12g sodium dodecylbenzenesulfonate to the above solution a to obtain solution b, wherein the ratio of sodium dodecylbenzenesulfonate to water in parts by mass is 0.12 : 98, stirring at a stirring speed of 500r / min for 20min; feed 420mL of air into the above-mentioned solution b, wherein the ratio of the volume and number of the air that feeds into solution b is 4.2: 1, and under the high-speed stirrer 40000r / min Stir for 5 minutes to obtain the air-foam rare earth-based gel.

[0036]The foam half-life of the air-foam rare earth-based gel prepared in this example is 46 hours, and the apparent viscosity is 989mPa.s; wh...

Embodiment 3

[0037] Embodiment 3, preparation air-foam rare earth base gel

[0038] 0.11g hydrophobic association polymer, 0.04g rare earth type water-based gel crosslinking agent (RL) were dissolved in 99g water to obtain solution a, wherein the mass fraction ratio of hydrophobic association polymer, RL and water was 0.11:0.04 : 99, stirring 110min at a stirring speed of 475r / min; adding 0.10g sodium dodecylbenzenesulfonate to the above-mentioned solution a to obtain solution b, wherein the mass and fraction ratio of sodium dodecylbenzenesulfonate to water 0.10:99, stirring at a stirring speed of 475r / min for 15min; feed 400mL of air into the above-mentioned solution b, wherein the volume ratio of the air and solution b is 4:1, and stir in a high-speed mixer at 35000r / min min under stirring for 4 min to obtain the air-foam rare earth-based gel.

[0039] The foam half-life of the air-foam rare earth-based gel prepared in this example is 43 hours, and the apparent viscosity is 912mPa.s; wh...

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Abstract

The invention discloses air-foam rare earth-base gel and a preparation method thereof. The preparation method comprises the following steps of: (1) dissolving a water-soluble polymer and a rare earth water-base gel cross-linking agent in water to obtain a solution a, wherein the rare earth water-base gel cross-linking agent is prepared by the following steps of: reacting rare earth chloride and alkali in water; and after the reaction is finished, adding organic acid and reacting; (2) adding a foaming agent into the solution a, and stirring uniformly to obtain a solution b; and (3) introducing air into the solution b, and stirring for foaming to obtain the air-foam rare earth-base gel. The air-foam rare earth-base gel has high anti-shearing performance, injection performance, temperature-resistant salt resistance and migration performance in a porous medium, has the characteristics of high stability and the like, and can be used for a series of oil gas exploitation technologies of the oil displacement and profile control of conventional oil deposits, the oil displacement and profile control of high-temperature and high-salt oil deposits, the profile control combined with acidification, the profile control and water plugging of gas fields of high-acidic gas and the like.

Description

technical field [0001] The invention relates to an air-foam rare earth-based gel and a preparation method thereof, belonging to the field of foam gels. Background technique [0002] Foam gel is a gel system in which the gel is the continuous medium, the gas is the dispersion medium, and the surfactant is the dispersant. The gas phase is generally air, natural gas, nitrogen and carbon dioxide. Since the foam gel can wrap the gas in the foam to form a stable gel system, air and natural gas can be used as the dispersed phase to avoid its unsafe factors. Due to its unique properties, foam gel has attracted more and more attention in the fields of oil development and oilfield chemistry, such as drilling, fracturing, acidizing, profile control and water shutoff, and oil recovery. At present, it is difficult to apply large-scale industrial applications mainly due to the influence of industrial gas sources and the stability of foam gels. Contents of the invention [0003] The o...

Claims

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Application Information

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IPC IPC(8): C09K8/588C09K8/44
Inventor 吕鑫赵娟王大威梁守成张健
Owner CHINA NAT OFFSHORE OIL CORP