Significant Control of Gas Invasion to the Phase Behavior of Deep-Seated Hydrocarbon Fluids in Western Junggar Basin, NW China.

In the western Junggar Basin, various oil and gas phases, such as black oil, volatile oil, condensate, and gas, have been discovered and reported. However, the primary factors responsible for the variations in oil and gas phases in different regions of the basin are not yet clearly understood. This study uses geochemical analyses, numerical simulations, and geological analyses to determine the extent of gas invasion in different regions, simulate the mechanism of gas invasion altering phase behavior, and shed light on its significant impact on fluid phases in hydrocarbons across diverse regions.