Research on the treatment and recycling technology of waste oil-based drilling mud in gas fields.

The waste gas mud generated during the drilling process of the Yanchang gas field is treated with solid-liquid separation, oil/water recycling, and solidification of bottom mud. Research shows that after solid-liquid separation of waste mud, the reduction rate reaches 82.11%, and the oil recovery rate and water content in the recovered oil are 94.50% and 0.43%, respectively; after chemical oxidation floeeulation filtration treatment, the separated effluent has a light transmittanee of over 98. 5% and can be used for the repreparation of oilfield working fluids; the oil content in the sediment is 4.56%, and after solidification treatment, the compressive strength can reach 15.977 MPa. It can be used for laying well pads or roads in oil and gas fields, and the leachate from the solidified form meets the water quality requirements of the "Comprehensive Wastewater Discharge Standard". [ABSTRACT FROM AUTHOR]