海洋地质前沿2017，Vol.33Issue(6)：34-39,6.DOI:10.16028/j.1009-2722.2017.06005
下扬子烃源岩新层位——中下奥陶统
A NEWLY DISCOVERED SOURCE ROCK IN THE MID-LOWER ORDOVICIAN IN LOWER YANGTZE AREA
摘要
Abstract
The Mid-lower Ordovician usually acts as reservoir for oil and gas accumulation in the Yangtze area,However,in the southern Anhui Province,there occurs a sequence of gray black to black siliceous mudstone and carbonaceous mudstone in the Ningguo Formation of Lower Ordovician.It consists of rich graptolite and is inferred as an open sea shelf or deep sea facies.The Hule Formation of Middle Ordovician which consists of thin-layered dark grey silty mudstone and thick-layered siliceous mudstone with rich graptolite,is also deposited in a shelf to deep basin environment.The two Formations are similar in depositional features and distribution patterns with rich graptolite fossil,but the Ningguo Formation is obviously thicker than the Hule Formation.Organic geochemistry of Ningguo Formation source rocks show that the average TOC is 1.24％.According to the upwelling features,and studies on lithology,lithofacies and organic geochemistry,it is concluded that the Middle-Lower Ordovician is likely to be a medium-good source rocks deposited by upwelling flow in the southern Anhui region.Since the South Yellow Sea Basin is the major part of the Lower Yangtze,it is suggested that the research of the Middle-Lower Ordovician source rocks be strengthened in the South Yellow Sea Basin.关键词
下扬子/中下奥陶统/宁国组/胡乐组/烃源岩Key words
Lower Yangtze/Mid-Lower Ordovician/Ningguo Formation/Hule Formation/source rocks分类
天文与地球科学引用本文复制引用
龚建明,王建强,程青松,陈建文,张银国,赵青芳,孙晶,廖晶..下扬子烃源岩新层位——中下奥陶统[J].海洋地质前沿,2017,33(6):34-39,6.基金项目
国家自然科学基金(41406080) （41406080）
国家专项(XQ-2005-01) （XQ-2005-01）
