Displacement method utilizing compound containing sulfonate negative non-surface active agent

An oil displacement method and composition technology, applied in drilling composition, chemical instruments and methods, earthwork drilling and production, etc., can solve problems such as alkali corrosion, poor oil displacement efficiency, and fouling damage in ASP flooding , to achieve good application prospects, enhance oil recovery, and avoid clogging

Active Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the oil displacement agent containing surfactant in the prior art has poor oil displacement efficiency under high temperature and high salt conditions, high use concentration and corrosion and damage caused by alkali in ASP flooding to formation and oil well. Fouling damage problem, providing a new oil flooding method using sulfonate anion non-surfactant compositions

Method used

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  • Displacement method utilizing compound containing sulfonate negative non-surface active agent
  • Displacement method utilizing compound containing sulfonate negative non-surface active agent
  • Displacement method utilizing compound containing sulfonate negative non-surface active agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (a) Synthesis of nonylphenol polyoxyethylene ether (n=6)

[0036] Add 220 grams (1 mole) of nonylphenol and 4.4 grams of calcium oxide catalyst to a reactor equipped with a condensing device, a stirring device and a gas disperser. When heating to 135 ° C while passing nitrogen, add 20 grams of water and stir the reaction 1 hour. After dehydration, cool down to 80°C, slowly add sulfuric acid (20wt%) to neutralize the theoretical amount of the catalyst dropwise to obtain a highly active, highly selective composite calcium oxide alkoxylation catalyst reaction solution system, and the system Heat the temperature to 80-90°C, turn on the vacuum system, dehydrate under high vacuum for 2 hours, then purge with nitrogen for 3-4 times, adjust the reaction temperature of the system to 140°C and slowly introduce 264 grams (6 moles) of epoxy Ethane, control pressure ≤ 0.40MPa. After the reaction, the system was purged with nitrogen, cooled, neutralized, and dehydrated to obtain 48...

Embodiment 2

[0045] (a) Synthesis of nonylphenol polyoxyethylene ether (n=3)

[0046] Add 220 grams (1 mole) of nonylphenol and 2.6 grams of calcium oxide catalyst to a reactor equipped with a condensing device, a stirring device and a gas disperser. When heating to 135 ° C while passing nitrogen, add 11 grams of water and stir the reaction 1 hour. After dehydration, cool down to 80°C, slowly add sulfuric acid (20wt%) to neutralize the theoretical amount of the catalyst dropwise to obtain a highly active, highly selective composite calcium oxide alkoxylation catalyst reaction solution system, and the system Heat the temperature to 80-90°C, turn on the vacuum system, dehydrate under high vacuum for 2 hours, then purge 3-4 times with nitrogen, adjust the reaction temperature of the system to 150°C and slowly feed 132 grams (3 moles) of epoxy Ethane, control pressure ≤ 0.40MPa. After the reaction, the system was purged with nitrogen, cooled, neutralized, and dehydrated to obtain 347 g of no...

Embodiment 3

[0055] (a) Synthesis of octylphenol polyoxyethylene ether (n=5)

[0056] Add 206 grams (1 mole) of octylphenol and 3.1 grams of calcium oxide catalyst to a reactor equipped with a condensing device, a stirring device and a gas disperser, and when heating to 135 ° C while passing nitrogen, add 14 grams of water and stir the reaction 1 hour. After dehydration, cool down to 80°C, slowly add sulfuric acid (20wt%) to neutralize the theoretical amount of the catalyst dropwise to obtain a highly active, highly selective composite calcium oxide alkoxylation catalyst reaction solution system, and the system Heat the temperature to 80-90°C, turn on the vacuum system, dehydrate under high vacuum for 2 hours, then purge 3-4 times with nitrogen, adjust the reaction temperature of the system to 150°C and slowly pass in 220 grams (5 moles) of epoxy Ethane, control pressure ≤ 0.40MPa. After the reaction, the system was purged with nitrogen, cooled, neutralized, and dehydrated to obtain 422 ...

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Abstract

The invention relates to a displacement method utilizing a compound containing sulfonate negative non-surface active agent, which mainly solves the problems in the prior art that the displacement efficiency of the displacement agent containing the surface active agent is poor under the high-temperature high-salt condition, the application concentration is high and alkali in a tertiary composite displacement causes the corrosion and scale accumulation harm on the stratum and an oil well. The displacement method adopts alkylphenol polyoxyethylene ether benzene sulfonate, polymer and water to be mixed into displacement agent compound, under the magnesium chloride injection water condition that the displacement temperature is 30 to 83DEG C, the total mineralization degree is more than 8000mg/L, magnesium ion is more than 200mg/L and calcium ion is more than 30mg/L, dehydrated crude oil is contacted with the compound, so that the crude oil in a core can be adequately displaced, and the compound comprises the following components in parts by weight: (1) 0.01 to 5 parts of alkylphenol polyoxyethylene ether benzene sulfonate; (2) 0.01 to 3 parts of polymer; and (3) 90 to 99.9 parts of injection water. Due to the adoption of the technical scheme, the problems can be well solved, and the displacement method can be used in the tertiary oil recovery of an oil field.

Description

technical field [0001] The present invention relates to an oil flooding method using a sulfonate-containing non-surfactant composition. Background technique [0002] With the development of society and economy, people's demand for oil continues to increase and oil reserves decrease, and oil, as a non-renewable resource, is becoming more and more valuable. The problems we are facing are: first, the contradiction between supply and demand is prominent, the demand for oil is getting bigger and bigger, and new oil fields are getting fewer and fewer; second, there is still a large amount of crude oil left in the depleted oil reservoirs. Primary oil recovery (POR) can produce 10-25% of underground crude oil, and secondary oil recovery (SOR) can recover 15-25% of underground crude oil, that is, primary oil recovery and secondary oil recovery only produce 25-50% of underground crude oil. In order to ensure the long-term stable supply of oil and meet the needs of human beings, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22C09K8/584
Inventor 沈之芹李应成孙文彬李慧琴
Owner CHINA PETROLEUM & CHEM CORP
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