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烃源岩
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烃源岩
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烃源岩
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source rock
烃源岩
富含有机质、在地质历史过程中生成并排出了或者正在生成和排出石油和天然气的岩石。简称源岩。只生成和排出油的岩石称为油源岩,只生成或排出气的岩石称为气源岩。由烃源岩构成的地层称为烃源层。在一定地质时期内,烃源层和非烃源层往往间互沉积,把具有相同岩性-岩相组合特征的若干烃源层与非烃源层的组合称为烃源层系或源岩层系。
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