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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They are diagenesis and evolutionary phase, reservoir space developing phase, oil-forming and assembling phase and forming oil and gas supplying phase.

即成岩演化阶段、储集空间发育阶段，成油组合阶段、油气补给条件形成阶段；

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The exploration in south fault-terrace belts of Gaoyou Depression is of low benefit owing to its fractured structure and complex oil-forming condition.

高邮凹陷南部断阶带构造破碎、藏条件复杂，导致勘探效益低。

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Page turning was slow and was accompanied by a distracting flash of black as the microspheres dived down into their oil-filled nodules before forming new text.

NEWYORKER: A New Page

To replace earlier finds, oil companies moved offshore, where rivers have been depositing petroleum-forming sediments for millions of years.

FORBES: Going deep