在珠江口盆地,早第三纪盆地张裂Ⅱ期是古湖泊鼎盛发育期,该期形成的湖相烃源岩是盆地的主力油源岩,经油源对比研究,已找到的储量可观的正常原油主要来源于该油源岩.张裂Ⅲ期是古湖泊的萎缩期,形成了广泛分布的煤系烃源岩,以该源岩为烃源的油气田相继被发现,证实该烃源岩是盆地的主要气源岩和重要的油源岩.这两套烃源岩生成油气的潜力巨大,由此揭示,珠江口盆地具有十分良好的油气勘探远景. In the Pearl River Mouth Basin, the Early Tertiary Period Zhang Zhang Ⅱ period is the peak of the ancient lake development, the formation of the lacustrine source rock is the main source rock in the basin, the source of comparative studies have found considerable reserves The normal crude oil is mainly derived from this source rock.The Zhangqi Ⅲ period is an atrophy period of the ancient lakes, and a wide range of coal-derived source rocks have been formed. Oil and gas fields with this source rock as source have been successively discovered, Is the main gas source rock and important oil source rock in the basin.The potential of hydrocarbon generation from these two sets of source rocks is huge, which reveals that the Pearl River Mouth Basin has a very good prospect of oil and gas exploration.