Calculation of component-fractional composition of extracted Kovykta field formation fluid

The purpose of the work is to calculate the component-fractional composition of the produced formation fluid using complex laboratory studies. The relevance of the study is determined by the obtaining of reliable data on formation fluid characteristics in order to ensure effective management of hydrocarbon production and processing. The laboratory studies resulted in the determination of the phase composition of downhole samples, which were presented by formation gas. Dependences of density and viscosity on pressure were determined for each sample, which enabled better assessment of fluid behavior under various production conditions. In addition, the conducted studies allowed us to identify the influence of geological factors on fluid composition and properties, which is important for optimizing production processes. Formation gas was subjected to degassing and a detailed component-fractional composition of degassing gas and degassed condensate was determined. The compositions of all the gases studied have been presented in two forms: an expanded component-fractional form (non-hydrocarbon components and hydrocarbons from methane to pentanes are presented individually, and hydrocarbons heavier than pentanes are grouped into narrow ten-degree fractions ranked by hydrocarbon boiling points) and a standard form (components heavier than pentane are presented as fractions by the number of carbon atoms with a more or less heavy residue). The composition of formation gas was calculated based on degassing gas and degassed condensate composition using the material balance principle. The data obtained can be used to analyze the hydrocarbon production process and further enhancement of the efficiency of the Kovykta field development. The research results contribute to deeper understanding of formation fluid characteristics and open new prospects for improving hydrocarbon production and processing technologies.