PETROLEUM GEOLOGICAL CHARACTERISTICS AND PETROLEUM SYSTEM OF TAIWAN STRAIT BASIN

Taiwan Strait Basin is a Mesozoic-Cenozoic superimposed basin suited in Taiwan strait and its neighborhood.The study illustrated that mudstone of tidal flat-lagoon in Paleocene and Eocene,and coaly mudstone of paralic faceies and marine mudstone in Miocene are main source rocks,and sandstones of lower tidal flat in Paleocene and Eocene and dalta sandstone in Miocene are reservoir rocks,and mudstone of Miocene-Quaternary is seal rock.There is significant difference between eastern depression and western depression.The study of petroleum geology suggests that there are two petroleum systems of Paleogene and Miocene in this basin.There is mainly petroleum system of Paleogene in eastern part of this basin that has better potential of petroleum,and there is mainly petroleum system of Miocene in western part of this basin that has good potential of petroleum.