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。

These basins have experienced several periods of hydrocarbon generation and expulsion, and the key factor to control hydrocarbon discovery and exploration potential is preservation.

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其分布与早第三纪生油期前基本结束活动的基岩断裂发育带、储集岩的岩性岩相及古风化淋滤带有关。

The porosity distribution is related to the basement faults, the lithofacies of the reservoirs and the weathering and leached zone.

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中生代是地质时期的第二个大时代，从大约2.25亿年前的古生代末延续到约7千亿年前的第三纪初。

The second major era of geological time which lasted from the end of the Palaeozoic era about 225 million years ago, to the start of the Tertiary, some 70 million years ago.

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