Research and application of harmless treatment technology for waste drilling fluid in the working area of Gulang ZK301 hole

Abstract:

Waste drilling fluid is a primary pollutant generated during geological drilling. It features complex compositions containing drill cuttings， refractory organic matter， various chemical additives and other contaminants. Improper disposal will easily cause ecological pollution to soil， surface water and groundwater. To address environmental pollution arising from inadequate treatment of diverse wastes produced in drilling operations， this paper analyzes the pollution characteristics of waste drilling fluid. A harmless environmental treatment process combining "gel breaking， flocculation， decolorization and solid-liquid separation" is adopted. After treatment， the liquid phase meets direct discharge standards， while the separated mud cake can be solidified to satisfy the specifications for construction materials. The harmless treatment technology for waste drilling fluid was applied on-site in Gulang ZK301 hole to verify its technical feasibility. This study provides theoretical support and engineering references for the upgrading， iteration and large-scale application of harmless treatment technologies for waste drilling fluid.