There is a big potential of exploration in deep formation of mature oil province. Theory of hydrocarbon generation in deep source rock is the base of finding deep reservoirs.
老油区深层具有很大的勘探潜力，深层烃源岩油气生成理论是寻找深层油气藏的基础。
Carbonate with lower organic abundance can generate certain hydrocarbon, yet has poor generation potential with less thickness and limited distribution.
碳酸盐岩有机质丰度较低，具有一定的生烃能力，但厚度较小，分布局限，生烃潜力不大。
These basins have experienced several periods of hydrocarbon generation and expulsion, and the key factor to control hydrocarbon discovery and exploration potential is preservation.
中国近海前第三纪残余盆地普遍经历了多期生排烃过程，保存条件是制约其油气发现和勘探潜力的关键。
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