塔里木盆地塔中地区下古生界二次生烃的类型及其特征

塔中地区下古生界碳酸盐岩烃源岩中的干酪根、吸附有机质、包裹体有机质和晶包有机质，可以成为二次生烃的物质来源。该地区存在两类二次生烃——构造运动二次生烃和碳酸盐岩深埋二次生烃，二者所形成的包裹体在类型、数量、大小、气液比、荧光颜色及强度等方面均有明显不同。通过对塔中地区多口探井和人工井的埋藏史和生烃史研究，表明塔中北斜坡下古生界碳酸盐岩可以二次生烃，面积约9000km^2，生烃时代主要为中新生代。此外，还利用逐级升温爆破—气相色谱方法，测定了高过成熟碳酸盐岩烃源岩中吸附有机质、包裹体有机质以及晶包有机质的数量和释放过程，以评价高过成熟碳酸盐岩烃源岩的生烃能力。研究塔中地区的二次生烃，对深部油气勘探有着重要的现实意义。

Classification and Characteristics of Hydrocarbon Regeneration from the Lower Palaeozoic Group in the Tazhong Area of Tarim Basin

Kerogen, adsorbed organic matter, inclusion organic matter and enclosed organic matter in the Lower Palaeozoic source rocks can serve as the source of hydrocarbon regeneration. There are two kinds of hydrocarbon regeneration: one is tectonic movement hydrocarbon regeneration and the other is deep-buried hydrocarbon regeneration. Fluid inclusions formed by these two different hydrocarbon generations are different in type, number, volume, gas to liquid ratio, fluorescent color and intensity. The study of burial history and hydrocarbon generation history of a number of drilling wells and artificial wells shows that Lower Palaeozoic source rocks on the northern slope of the Tazhong area can regenerate hydrocarbons. The area of hydrocarbon regeneration is 9000 km+2, and the time of hydrocarbon regeneration is mainly the Mesozoic-Cenozoic period. Furthermore, the gradual temperature-raising explosion-gas chromatograph method is applied to determine the amount of adsorbed organic matter, inclusion organic matter and enclosed organic matter and their releasing process of highly overmatured carbonate source rocks to evaluate the hydrocarbon regeneration capacity. The study on the hydrocarbon regeneration of the Tazhong area is proved to be very important for deep oil/gas exploration.