A method for treating waste mud and cuttings of deep well sulfonated drilling fluid

Abstract

The invention discloses a method for treating waste mud and cuttings of deep well polysulfide drilling fluid. The method uses the waste mud of deep well polysulfide drilling which contains sulfonated phenolic resin, asphalt powder, barite and other high viscosity and is easy to solidify when heated. And rock cuttings are preliminarily dried by heat exchange with high-heat exhaust gas, and then high-temperature pyrolysis is carried out by high-heat air. High-heat air is generated by further heating after heat exchange with hot slag generated by air pyrolysis, and the hot slag after heat exchange and cooling can be collected centrally. The barite can be recovered through the barite collection tank and the three-stage cyclone separator; the high-heat exhaust gas after cooling can reach the standard discharge after being treated by dust removal and washing. The invention can quickly, efficiently and conveniently realize resourceful and harmless treatment of waste mud and drilling cuttings of deep well sulfonated drilling fluid, and simultaneously realize the recovery and reuse of heat energy and the recovery and utilization of barite resources.

Description

technical field [0001] The invention belongs to the technical field of waste mud treatment in oil and gas fields, and in particular relates to a recycling and harmless treatment method for waste mud and cuttings of deep well sulfonated drilling fluid. Background technique [0002] In the process of deep well drilling, due to the high formation temperature, in order to achieve high efficiency and safety of drilling operations, polysulfonated anti-slump high-temperature drilling fluids with additives such as barite, sulfonated phenolic resin, sulfonated tannin, and asphalt powder are generally used Tie. This system ensures safe and rapid drilling during the drilling process. However, due to the many types of additives, high dosage and complex composition, the waste mud cuttings formed after the operation is abnormally stable, with complex pollution components and difficult treatment. It is difficult to achieve the chroma and COD of solid waste leachate by conventional solidif...

AI Technical Summary

Problems solved by technology

The invention realizes the harmless treatment of drilling waste, and the disposal mixture complies with the national soil quality level 3 standard. The components are highly integrated, the device occupies a small area, can be concentrated and continuous, and the treatment efficiency is high, but it does not involve the tail gas treatment system.

Images