Treatment technology for oily sludge and drillings

Abstract

The invention discloses a treatment technology for oily sludge and drillings. The technology of combination of two times of rinsing is provided according to the characteristics of pollutants in the oily sludge and drillings, so that the problem that the oily sludge and drillings are not treated thoroughly during a single-cleaning process is avoided. Preparation of a cleaning solution for the treatment technology is characterized by comprising the following steps: sodium carbonate and dodecyl trimethyl ammonium chloride are accurately weighed, are dissolved in water, and are mixed uniformly according to a concentration ratio of 2 to 1; then a reverse demulsifier with the volume ratio of 2.5%, PAM with the concentration of 7500 mg / L and PAC with the concentration of 625 mg / L are added in; and the mixture is fully stirred and is mixed uniformly. According to the treatment technology disclosed by the invention, a current treatment technology for the oily sludge and drillings in China is successfully improved; the pollutants in the oily sludge and drillings are subjected to stabilization and detoxification treatment by adopting a chemical method; and the combination of two times of rinsing is innovatively provided, so that energy consumption is further reduced, and the secondary cleaning solution can be recycled for use. Compared with the current technology in China, the treatment technology disclosed by the invention has the advantages that the technology is simple in treatment process and high in practicality, and is capable of being widely applied. Therefore, the treatment technology has novelty, creativity and advancement and has very high practical application value.

Description

technical field [0001] The invention relates to pollution control in the drilling process of oil and gas fields, in particular to oily sludge and drill cuttings treatment technology. Background technique [0002] Oily sludge and drill cuttings are solid pollutants produced during oil well exploitation. It is a complex multiphase system containing a large amount of oils, phenols, heavy metals, various polymers, defoamers, emulsifiers, etc. If it is discharged without treatment, it will cause adverse effects on the environment. Its leachate has high toxicity. Oilfield drilling produces a large amount of oily sludge and cuttings every day. The direct discharge of oily sludge and cuttings will affect the nutritional environment and quality of crop growth. Long-term accumulation will cause serious damage to surface vegetation and pollute the soil. and water sources, endangering human survival. Therefore, the treatment of oily sludge and drilling cuttings from oilfield drilling...

AI Technical Summary

Problems solved by technology

Although this method has a simple process and meets environmental protection and various industrial requirements, the preparation of the flushing liquid in the treatment process requires heating the flushing liquid to 80°C, which increases the operating cost and is not conducive to large-scale industrial operation.

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