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天然气聚集相态是影响其成藏的重要因素。不同类型的源岩在不同的成烃阶段具有不同的排气相态。天然气二次运移相态除了受其源岩排气相态的影响外 ,还受运移途中温度压力及介质条件的影响。不同相态天然气运聚受不同势场控制 :水溶相天然气在水势场中受水动力的作用 ,油溶相在油势场中受油的浮力和水动力作用 ,游离相在气势场中受气的浮力和水动力作用。因此 ,所形成气藏的分布规律存在差异性。对于不同相态成因的气藏的勘探应采用不同方法。
Gas accumulation phase is an important factor affecting its accumulation. Different types of source rocks have different exhaust phase states at different stages of hydrocarbon generation. In addition to the influence of the phase state of the source rock on the gas phase, the secondary phase of gas migration is also affected by the temperature and pressure on the way of transport and the medium conditions. Different phases of natural gas transport and polymerization are controlled by different potential fields: natural gas in water-phase facies is subjected to hydrodynamic forces in the water potential field, oil buoyancy and hydrodynamic forces in the oil potential field, and the free phase is affected by the gas field Buoyancy and hydrodynamic effects. Therefore, there are differences in the distribution of gas reservoirs. Different methods should be used for the exploration of gas reservoirs with different phases.