优质烃源岩的分布对油气成藏具有控制意义,在潜在烃源岩发育层段中找出优质烃源岩,是进一步提高我国近海盆地油气勘探水平的关键环节之一.海上勘探取岩心困难,制约了对烃源岩的优选.目前已建立了利用测井信息评价烃源岩的方法,并在陆上的渤海湾盆地济阳坳陷和柴达木盆地取得了较好的应用效果.我国近海盆地与这些陆上盆地具有相似的地质特征,所建立的测井评价方法也将同样适用.已知东海、珠江口、莺歌海以及渤海等浅海盆地的烃源岩非均质性都比较严重,在厚度巨大、分布很广的暗色泥页岩中找出优质烃源岩,将有效提高我国近海盆地的油气勘探成功率.

As the control effect of the distribution of excellent hydrocarbon source rocks on hydrocarbon accumulation, it is of great importance to identify it for Chinese offshore hydrocarbon exploration, which is very difficult because of hard drill-coring. The method of evaluating hydrocarbon source rocks by logging data has been built and better applied in continental Jiyang Depression in Bohaiwan Basin and Qaidam Basin. It can be also used in offshore basins as they have the similar geological characteristics. As we know, hydrocarbon source rocks are quite heterogeneous in offshore basins such as East China Sea, Pearl River Mouth, Yinggehai and Bohai basins, so locating better source rocks among dark mud shale with large thickness and wide distribution will effectively improve the success rate of offshore hydrocarbon exploration.