下扬子区下组合烃源岩热演化及有效性研究

下扬子区是南方海相具有油气勘探远景的地区之一。应用新增的勘探资料，采用新的技术方法，结合野外、室内综合研究，分析烃源岩构造-热演化。研究结果表明，晚印支-早燕山期，下扬子区的构造运动以逆冲推覆为主，大部分地区遭到抬升剥蚀，部分地区下古生界烃源岩抬升后晚期没有再度深埋，保留了印支期的热演化状况，因此下古生界高成熟腐泥型烃源岩现今仍具有一定的生烃潜力。在演化程度普遍较高的下扬子区下古生界，找到局部热演化程度相对较低，具有油气勘探前景的地区和层位是可能的。

Thermal Evolution and Effectivity of Source Rocks of the Lower-Paleozoic in Lower Yangtze Region

Lower Yangtze Region is one of the marine facies regions which present petroleum exploration prospects in southern China. Using new exploration information and technology methods, we analysed the tectonic\|thermal evolution of source rocks of the lower-Paleozoic by field and experimental methods. Results show that obduction and napper were main tectonic movements in late Indosinian-early Yanshan period of Lower Yangtze Region, and most areas were elevated and denudated. Source rocks of lower-Paleozoic in some areas did not deep bury renewedly, and remain the Indosinian thermal evolution state. Therefore the high  maturity sapropelic organic matter of lower-Paleozoic has still possessed hydrocarbon generation potential. So it is possible to find layers and areas with hydrocarbon potential, of which source rocks have relative lower thermal evolution, in lower-Paleozoic Lower Yangtze Region.