Bactericide used in oilfield water treatment system and its preparation method and application

Abstract

The invention provides a sterilizing agent for an oilfield water treatment system as well as a preparation method and application thereof. The sterilizing agent is prepared from the following components of 5wt.% to 60wt.% of dodecyl dimethyl benzyl ammonium halide, 0.5wt.% to 5wt.% of D-amino acid, 10wt.% to 30wt.% of surfactant, 3wt.% to 10wt.% of buffer agent and the balance of water. The sterilizing agent has the advantages that the sterilizing efficiency is high, the efficient sterilizing property on SRB (sulfate reducing bacteria) and TGB (total general bacteria) is realized, the durationof effect is long, the production process is simple, and the cost is low.

Description

technical field

[0001] The invention relates to a bactericide used in an oilfield water treatment system and its preparation method and application, belonging to the technical field of oilfield chemistry. Background technique

[0002] With the continuous development of oilfields, most of my country's onshore oilfields have entered the mid-to-late development period, and the water content of produced fluids has continued to rise, and the water content of some blocks has reached more than 90%. Most of the oil production wastewater is treated and reinjected into the oil layer. The reinjection of oilfield wastewater can not only supplement the energy of the formation, maintain the stable production of the oilfield, improve the recovery rate, but also reduce the harm caused by the sewage discharge to human beings and the ecological system, which is beneficial to the protection of the environment. There are many types of microorganisms in oilfield reinjection water, which can caus...

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