Fractional composition of gas condensate
composition of gas condensate
Gas condensate is a valuable chemical raw material, which is a liquid mixture of high-boiling hydrocarbons of various structures, a derivate from natural gas while their extraction from gas condensate spots. The main gas condensate reserves are located in West of China. Gas condensate is relatively cheap and is close in composition to motor fuels, so it is used at the oil and gas extraction plants as a fuel for machineries, multi-fuel engines and trucks and tractors. Stable gas condensate is used two forms, pure or mixed with diesel fuel.
Gas condensate is a colorless or slightly colored liquid from straw-yellow to yellow-brown in color. The shade depends on the amount of oil impurities. The deeper the condensate is extracted, the more saturated its color is. Otherwise, gas condensate is also called “white oil”. Gas condensate contains the following fractions:
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Recovery of gas condensate
When wet natural gas is being developed, gas condensate deposits are used to extract SGC. Condensate is also extracted from related petroleum gas generated during the extraction of oil, and in smaller amounts, from dry natural gas and gas treatment facilities. The gas condensate is found in a gaseous condition in nature. When gas or oil is produced, unique conditions are generated, which leads to the formation of condensate. The gasoline-kerosene fractions stored on the shelves are subjected to elevated temperatures and pressures. When a gas production business attempts to reach gas-containing shelves by digging through the thickness of the earth, both indications decrease. As an illustration, the pressure drops from 10–60 to 4–8 Mpa. Condensation happens when there is a decline in performance.
Certain fractions (C1–C2) are injected back into deposits that contain a lot of gas condensate in order to retain the pressure at the proper level for producing gas condensate and to keep it from dropping to the atmospheric level. The only hydrocarbons that rise above C3 are able to surface. The concentration of gas condensate might range from 5 to 1000 g/m3, contingent upon the quality of the natural gas. The indications are larger the higher the starting pressure was in the thickness of the deposits.
Depending on the method of production and technical characteristics, two types of gas condensate are distinguished:
Stable gas condensate
- Field SGC The product is obtained directly at the mining site.
- Factory SGC It is produced at GPP (gas processing plants).
Unstable gas condensate
The main task is to convert unstable gas into a stable form. The oil product is purified from impurities and light hydrocarbons (methane, butane, and propane), and degassed to reach it. As a result, it becomes stable – it contains no more than 2-3% propane-butane, gasoline-kerosene, and gas oil fractions.
It also contains hydrocarbons C5 and higher, as well as gases of the methane-butane fraction. They facilitate the extraction of condensate, but for further use, it requires special treatment.
