The Possibility of Using the Liquid Phase of Drilling Waste in the System of Formation Pressure Maintenance

Abstract

Practically all the known techniques of the recycling of drilling waste (drilling wastewater, waste drilling fluids) provide for the separation of liquid and solid waste recyclables. At the same time recycling of the liquid phase is associated with certain difficulties due the salinity of obtained solutions that eliminates discharge of these waste into water bodies or lie of the ground. The most natural direction of recycling the liquid phase of the drilling waste is to use them in the system of formation pressure maintenance (FPM). There was conducted research to study the compatibility of drilling liquid with fluid used in the system of FPM. The obtained results indicate the presence of drilling wastewater compatibility with fluid in the system of FPM in comparison with the liquid phase of spent drilling fluids. For the liquid phase of spent drilling fluid use as the liquid in the system of FPM the need the arrangement to prevent the precipitation formation (calcium sulphate).