Anti-swelling and discharge-aiding agent

Abstract

The invention discloses an anti-swelling and discharge-aiding agent which comprises the following components by weight percent: 2% to 4% of fluorocarbon surfactant, 35% to 45% of tetramethylammonium chloride with the content of 50%, 1.5% to 3% of discharge-aiding agent, 0.3% to 0.8% of alkylphenol ethoxylates, 0.3% to 0.8% of sodium dodecyl benzene sulfonate and 50% to 60% of water. The anti-swelling and discharge-aiding agent is a low-molecular mixture formed by combining an anti-swelling agent with the discharge-aiding agent, so that the anti-swelling and discharge-aiding agent with dual functions is obtained. Thus, the yield of oil and gas exploitation is effectively improved; the anti-swelling and discharge-aiding agent can be recycled. As a result, the cost of the oil and gas exploitation is greatly lowered.

Description

[0001] technical field [0002] The invention relates to an additive used in the process of oil exploitation, in particular to an anti-swelling and drainage aid. Background technique [0003] In the existing oil extraction process, anti-swelling agents and drainage aids need to be used respectively. Among them, the anti-swelling agent is a mixture of organic cationic polymers. The molecular chain contains multiple cationic groups, which can be strongly adsorbed in the form of a network. At the exchange point of the clay, it is firmly adsorbed on the clay surface through intermolecular force and hydrogen bond force. It can obviously prevent the hydration expansion and dispersion migration of clay minerals in the reservoir, so that the apparent water absorption index of oil field water injection can be greatly improved. The molecular weight of the product is appropriate, and it is suitable for high-permeability and low-permeability oil and gas formations, and its unique rigid...

AI Technical Summary

Problems solved by technology

[0004] However, traditional anti-swelling agents are all polymer compounds, which are difficult to be effectively compatible with existing drainage aids

In addition, many units in the industry still use potassium chloride as an anti-swelling agent, but long-term use of potassium chloride will cause great damage to the formation, and these anti-swelling agents and drainage aids cannot be reused

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