Salient features of the deposit geological structure in the Usinskoe oil field and the composition of the oil produced

Development of the Usinskoe Oil Field (Republic of Komi) has been underway since 1977. The structure of the oil holding reservoirs and deposits of hydrocarbons associated with them is very complicated; within the cross sectionof the deposit, 3 production targets have been identified: I - bottom target, II - middle target and III - top target.The paper highlights the differences in the composition and properties of the oil samples belonging to different deposit targets. This information can of use helping to clarify geological structure, to determine the characteristics of the crude hydrocarbons and productivity of each oil target when they are operated jointly in the oil well.
Materials and methods
Oil samples from the Usinskoe Oil Field from different development targets, determination of density using picnometer (bottle) method, determination of dynamic viscosity on the Reotest instrument, electronic spectroscopy, potentiometric titration of acids, gas chromato-mass-spectrometry.
Results
As a result of a number of studies performed, salient features of the geological structure have been investigated as well as the composition and properties of the oils from the Usinskoe Oil Field belonging to different targets of the deposit.
Conclusions
Thus, the content of the main classes of hydrocarbons (alkanes, arenes and cyclanes), heteroorganic compounds, as well as the values of viscosities and densities of oils sampled from different objects could be used for differentiation of oil-bearing objects and field management.