High-temperature-resistant viscosity-reducing oil-displacing agent for thickened oil steam chemical flooding and preparation method and application thereof
Active Publication Date: 2020-10-27
SHANDONG XINGANG CHEM
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However, the main agent of the oil displacement agent is sulfonated phenolic resin, which will cause great harm to construction personnel and the environment, and is not conducive to environmental protection requirements
The heavy oil viscosity reducing oil d
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Embodiment 1
[0040] The water of 200kg is joined in the reactor, control temperature 30 ℃, add 100kg phenol ether carboxylate (R 1 =8, n=15) and 200kg fatty alcohol polyoxyethylene ether (R 2 =8, n=20), stir and dissolve evenly, then add methanol 100kg, after fully stirring, add 400kg α-sodium olefin sulfonate (R 3 =9, n=2), and stirred evenly to obtain a high-temperature-resistant viscosity-reducing oil-displacing agent.
[0041] The detection data is as follows:
[0042]
Embodiment 2
[0044] The water of 200kg is joined in the reactor, control temperature 32 ℃, add 300kg phenol ether carboxylate (R 1 =10, n=10) and 100kg fatty alcohol polyoxyethylene ether (R 2 =14, n=9), stir and dissolve evenly, then add ethanol 100kg, after fully stirring, add 300kgα-sodium sulfonate (R 3 =10, n=3), and stirred evenly to obtain a high temperature resistant viscosity reducing oil displacement agent.
[0045] The detection data is as follows:
[0046]
Embodiment 3
[0048] The water of 200kg is joined in reactor, control temperature 35 ℃, add 200kg phenol ether carboxylate (R 1 =12, n=6) and 100kg fatty alcohol polyoxyethylene ether (R 2 =10, n=15), stir and dissolve evenly, then add isopropanol 150kg, after fully stirring, add 350kgα-sodium olefin sulfonate (R 3 =13, n=1), and stirred evenly to obtain a high temperature resistant viscosity reducing oil displacement agent.
[0049] The detection data is as follows:
[0050]
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Abstract
The invention provides a high-temperature-resistant viscosity-reducing oil-displacing agent for thickened oil steam chemical flooding and a preparation method and application thereof, belongs to the field of oilfield chemistry, and can solve the technical problems that the existing thickened oil viscosity-reducing oil-displacing agent cannot meet the temperature-resistant requirement of steam flooding, is not beneficial to environmental protection and the like. The high-temperature-resistant viscosity-reducing oil-displacing agent for thickened oil steam chemical flooding is prepared from thefollowing components in percentage by mass: 10 to 30 percent of phenol ether carboxylate, 10 to 20 percent of fatty alcohol-polyoxyethylene ether, 30 to 40 percent of alpha-alkenyl sulfonate, 10 to 20percent of low-carbon alcohol and the balance of water. The oil-displacing agent has the characteristics that the oil-displacing agent can resist high temperature of 300 DEG C, the salt resistance can reach 100000mg/L, the oil-water interfacial tension is less than 5 * 10 <-3 > mN/m, the viscosity reduction rate is 95% or above, the raw materials are easy to purchase, the process is simple, the cost is low, and the oil-displacing agent is green and environment-friendly.
Description
technical field [0001] The invention belongs to the field of oilfield chemistry, and in particular relates to a high-temperature-resistant viscosity-reducing oil displacement agent for steam chemical flooding of heavy oil, a preparation method and application thereof. Background technique [0002] Heavy oil resources are a huge potential resource in my country. Heavy oil is rich in asphaltenes and colloids, has a very high density, high viscosity, and poor fluidity, which brings great difficulties to mining and transportation. Therefore, effectively reducing the viscosity of heavy oil and improving the fluidity of heavy oil is the key to solving heavy oil production, transportation and refining. [0003] At present, the main method of heavy oil development is steam injection thermal recovery, and steam huff and puff is the main method. After many rounds of throughput, it must be transferred to steam flooding in due course. Steam flooding oil recovery is a thermal recovery ...
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