DEVELOPMENT AND RESEARCHING OF DRILLING FLUIDS PROPERTIES TO CARRY OUT WORKS UNDER CONDITIONS OF ABNORMALLY HIGH RESERVOIR PRESSURES

Abstract

The article presents systematization and comparative analysis of the killing the well technologies using fluids based on organic and inorganic salts. Based on its results it was found that the common practice in Ukraine to kill the wells with abnormally high reservoir pressure is to use clay weighted drilling muds. In order to develop solutions requiring minimum funds for manufacturing of selected reagents, it was specified the list of drilling fluids for further research and development to carry out works under conditions of abnormally high reservoir pressures. The article shows the results of research of drilling fluids composition such as solubility in acid and corrosive action. Based on those parameters, the optimum types of fluids for Ukrainian fields, with abnormally high reservoir pressure, were chosen. In Ukraine the number of production wells that are moving to the final stage of development is growing every year, which increases the need for workover operations. Each underground operation of well workover is necessarily accompanied by killing the well with further technological completion after the casing repairing. Qualitative fluid with minimal corrosion action for killing the wells is the key to success in further completion, testing and exploitation