Oily sludge profile control agent and preparation method thereof

Abstract

The invention discloses a sludge profile control agent and a preparation method thereof, wherein the sludge profile control agent comprises 0.1-0.5% of a thickener, 0.01-0.2% of a crosslinking agent,oily sludge and water. A surfactant group is introduced into thickener molecules, the oily sludge can be effectively suspended and dispersed, and the crosslinking agent is a hydroxymethyl amine solution. The preparation method comprises the steps of mixing clear water and the oily sludge in accordance with the proportion evenly, firstly adding the crosslinking agent and stirring evenly, then adding the thickener, continuing to stir to obtain the sludge profile control agent having good injection performance; the sludge profile control agent has controllable gelling time, has relatively strongsealing and plugging ability and salt tolerance, and achieves deep profile control; the profile control agent realizes utilization of resources of the oily sludge, has no use of phenol and aldehyde products, and is an environmental-protection type profile control agent.

Description

technical field [0001] The invention relates to the technical field of oilfield profile control agents, in particular to an oily sludge profile control agent and a preparation method thereof, which is a deep oily sludge profile control agent with controllable gelation time. Background technique [0002] In the process of oil field development, oily sludge will be generated in oil-water separation, sewage treatment and storage and transportation systems. A large amount of oily sludge will seriously affect the on-site production environment and increase production costs. Therefore, while developing production, how to realize economical and effective harmless treatment of oily sludge is an urgent problem to be solved in the production process of oilfields. Since the oily sludge is produced in the formation and has good compatibility with the oil layer, and the solid phase particles in the oily sludge have a profile control effect, the oily sludge can be used as the basic raw ma...

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Problems solved by technology

[0003] In the process of sludge profile control and water plugging, since the oily sludge contains a large amount of oil, sediment and inorganic salts, the thickener cannot completely and effectively disperse and suspend the oily sludge, which is easy to cause stratification, so that the prepared profile control gel The performance is not up to standard, water separation and separation occur, it is not resistant to temperature and erosion in the formation, and the validity period of water plugging is short, etc.

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