Determination of mineralization of reservoir water salinity based on geophysical survey data at the Raduzhny license area

Abstract

The need to study the salinity of reservoir water arose during the drilling of the first wells at the Raduzhny license area, particularly while interpreting the geophysical surveys of the geological section. Since this well is the first one drilled at Raduzhny, there is no existing database to establish the total mineralization of reservoir water along the vertical section. To address this issue, the author of this article used an integrated approach, taking into account data from neigh-boring fields. Geological and geophysical interpretation must consider the specific characteristics of the study area, where the section penetrated by the wells corresponds to a particular geological type. In this instance, the Tazovsky type of geological section includes the Raduzhnoye, Zapolyarnoye, Yamsoveyskoye, and Yaro-Yakhinskoye fields. The author performed an integrated interpretation across the entire section, from the PK1 reservoir to Ach (BT12). To obtain more complete information about the petrophysical properties of the mentioned reservoirs, the article analyzed the interpretation of geophysical data from fields located in close proximity to the Raduzhny area of the Tazovsky section type. The performed complex of geophysical surveys at these fields is consistent with regulatory documents for well drilling. The author selected a method for determining reservoir water salinity to assess the type of reservoir saturation. This method was subsequently applied in the operational interpretation of the first well drilled in the Raduzhny license area.