Successful managed pressure drilling by Naftagaz-Drilling

Successful managed pressure drilling by Naftagaz-Drilling

Naftagaz-Drilling carries out drilling of challenging boreholes under managed hydrostatic pressure at the Archinskoye field. Currently the drilling crew is finalizing the second similar borehole, and the works are progressing in line with the project schedule. This method is referred to as “underbalanced drilling” and is considered as nonconventional. Its application is associated with high complexity of the field. Only experienced specialists who are well familiar with advanced technologies are involved in works. Exponential growth in well output is one of the beneficial effects of the method. It also allows to minimize contamination of the formation, including of the bottom-hole zone, increase both drill meterage index per bit and penetration rate, as well as reduce negative impact of the mud on porosity and permeability properties. NaftaGaz is frequently engaged by customers in challenging projects due to availability of the required expertise and consistent delivery of high-quality work. For instance, horizontal drilling amounts to 70% of company’s portfolio with the market average figure standing below 40%.