CHANGE IN THE MICROELEMENTAL COMPOSITION OF CRUDE-OIL CONTAINING DISSOLVED FORMATION GASES

The average content of microelements (ME) in crude oils and gas conden sates (GC) is given, as well as their average content in the condensat ion waters of gas and gas-condensate fields. It is shown that, in the case of the entry of natural gas into an oil formation and its subsequ ent dissolution, ME are added to the crude oil, altering its initial m icroelemental composition, The introduction of ME into the erode oil d epends on the content of high-boiling hydrocarbons (HC) and water vapo ur in the formation gas, and also on the amount of gas dissolving in 1 t of crude oil under the temperature and pressure conditions in the f ormation. For the case of the formation mixtures of three gas-condensa te fields (GCF), and also the formation mixture of a hypothetical gas field, an estimate is made of the quantities of 32 ME entering crude o il with dissolving gas.