Modern Mudlog Usage in Horizontal Drilling for Complex Eastern Siberia Geology

In the season 2018-2019 at Ignyalinskoye field of Gazpromneft-GEO, pilot works were carried out to apply the technology of the modern mudlog. In addition to high-precision gas logging, a modern complex of research of mud was used, which allows to quickly determine its elemental and mineral composition. Based on the logging and mudlog data, the properties of the reservoir and the points of the packers for hydraulic fracturing were determined. The data of the modern mudlog can be used for well placement and allocation of reservoirs, which allows to optimize the work program for the well and reduce the cost of its construction. Only within the framework of pilot works, it was possible to reduce the cost of the well by 4.5%.