刚果扇盆地X区块中新统浊积水道类型及沉积演化特征  

Turbidite channel types and sedimentary evolutionin Miocene of Block X in Congo Fan Basin

作　　者：刘小龙 程涛 郝立华 LIU Xiaolong;CHENG Tao;HAO Lihua(CNOOC International Ltd.,Beijing 100028,China)

机构地区：[1]中国海洋石油国际有限公司,北京100028

出　　处：《石油地质与工程》2024年第3期29-35,41,共8页Petroleum Geology and Engineering

基　　金：中国海洋石油集团有限公司“十四五”重大科技项目(KJGG2021-0901)。

摘　　要：刚果扇盆地中新统深水沉积领域已发现储量占盆地63%,是该盆地重要的勘探领域。基于井震资料搭建了中新统层序格架,并对浊积砂岩储层发育的主要沉积类型特征进行剖析,指出刚果扇盆地X区块发育侵蚀型、侵蚀-加积型和加积型三种水道类型,并依次剖析了各类水道内部充填结构特征;最后,结合区域构造活动和西非海平面变化,在层序地层格架下总结了浊积水道的沉积演化特征,明确了各三级层序内浊积水道类型、数量及规模,指出研究区主要的勘探层系和水道类型,为刚果扇盆地X区块岩性目标勘探提供了地质依据。The discovered reserves in Miocene deep-water sedimentary of Congo Fan Basin account for 63%,making it an important exploration play.Based on drilling and seismic data,a sequence framework of Miocene was constructed,and the main sedimentary characteristics of turbidite sandstone reservoirs were analyzed.It was pointed out that Block X in Congo fan basin developed three types of turbidite channels:erosion type,erosion-aggradation type,and aggradation type,and then the internal filling structure of each channel type has been analyzed.Finally,combined with regional tectonic activities and sea level changes in West Africa,the sedimentary evolution characteristics of turbidite channels were summarized within the sequence stratigraphic framework.The types,quantities,and scales of turbidite channels in each third order sequence were identified,and the main exploration layers and channel types in the study area were pointed out,providing a sedimentary theoretical basis for the exploration of lithological targets in Block X.

关 键 词：刚果扇盆地 中新统 浊积水道 沉积特征 

分 类 号：TE111.3[石油与天然气工程—油气勘探]