塔里木盆地逆冲带构造特征与油气

塔里木盆地在叠合复合盆地构造发展过程中,形成和发育了三期、四个逆冲带,即志留泥盆纪的塔里木南部逆冲带,二叠纪的塔里木北部逆冲-走滑带和晚第三纪-第四纪的库车逆冲带和塔西南逆冲带。对上述塔里木盆地逆冲带分布和形成的区域构造背景研究基础上,系统论述了各逆冲带构造基本特征,探讨了逆冲带与油气的关系,并认为塔里木盆地目前已发现或探明的油气田(藏)大多数与这三期古今逆冲带(含前缘隆起)有关,塔里木盆地逆冲带具良好的油气勘探前景。

STRUCTURAL CHARACTERISTICS AND OIL & GAS OF THRUST BELTS IN TARIM BASIN

In the process of superimposed-compound tectonic development in Tarim Basin, four thrust belts were formed during three different periods, including southern Tarim thrust belt developed from Silurian to Devonian, northern Tarim thrust--strike slip belt in Permian, Kuche and southwest Tarim thrust belt from Neogene to Quaternary.The basis of distribution of these thrust belts and regional tectonic settings, the basic structural characteristics, the relationships between thrust belts and oil & gas in Tarim Basin were discussed. It comes to a conclusion that now most discovered and proved oil-gas reservoirs in Tarim Basin are related with these ancient-present thrust belts (including forebulge), which are good prospects for exploration in Tarim Basin.