Due to far away from the hydrocarbon source rock, oil-gas migration and building-up conditions became the main controlling factor of the formation trap reservoir forming.
由于距离烃源岩较远，油气运移聚集条件成为地层圈闭成藏的主要控制因素。
It verified from correlation of gas soure that they are of affinity between oil-forming gas and Permian oil source rock here.
气源对比证实，该区油型气与二叠系源岩具有亲缘性。
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