龙湾筒凹陷三维区烃源岩特征及评价

Characteristics and Evaluation of Source Rocks in Three-Dimensional Section of Longwantong Sag

为获取龙湾筒凹陷勘探部署的基础资料,通过烃源岩分布、有机质丰度、类型以及成熟度等几个方面,对龙湾筒凹陷三维区烃源岩的地球化学特征进行了综合研究,并对远景资源量进行了估算。研究表明,龙湾筒凹陷的主力烃源岩为九佛堂组下段暗色泥岩,有机质丰度高,有机质类型为Ⅰ型和Ⅱ1型;除额尔吐断阶带,全区九下段烃源岩基本进入成熟阶段。通过盆地模拟资源量估算,预测汉代、余粮堡及太平庄三个洼陷的石油远景资源量共为1.08×10^8t,具有一定的资源潜力。

In order to obtain the basic data of exploration deployment in Longwantong sag,an integrated study on characteristics of the source rocks and the estimation of prospective resources in three-dimensional section of Longwantong sag are based on source rock distribution,organic abundance,type and maturity.This study indicates that the dark mudstones of the Lower Jiufotang Formation is the chief source rocks.The abundance of organic is high and the organic is typeⅠandⅡ1.Except for Ertu fault step zone,the whole source rocks of Lower Jiufotang Formation basically enter into mature period.By basin simulation,the prospective resource quantity of Handai,Yuliangpu and Taipingzhuang subsags is estimated to be 1.08×10^8 t,so the research area has a certain resources potential.