摘要
福山凹陷流一段沉积时期,主要以辫状河三角洲沉积为主,同时在半深湖—深湖区发育重力流沉积。以A、B井为例,根据岩心测井资料,对重力流发育特征进行剖析,结合该区的构造特征和沉积背景建立了福山凹陷流一段的重力流沉积平面展布与沉积模式。根据单井相分析识别出该研究区的重力流沉积为远端湖底扇沉积,并分为碎屑流沉积和浊流沉积2种类型。总体垂向上由下至上发育着湖底扇—辫状河三角洲前缘—辫状河三角洲平原的沉积演化序列。该研究将为福山凹陷岩性油气藏的进一步寻找和评价提供依据。
The sedimentation of the Liu 1 formation in the Fushan sag was dominated by braided river delta,and there also developed gravity flow sedimentation in the semi-deep to deep lake zones. The characteristics of gravity flows are dissected according to core and log data by taking Well A and B as examples. A model of areal distribution of gravity flow sedimentation is built for the Liu 1 formation based on the structural attitude and depositional setting of this area. Analysis of single well facies has identified that the gravity flow sedimentation in the study area belongs to distal sublacustrine fan,which can be divided into debris flow and suspended current sedimentations. The sedimentary evolutionary sequence had developed upwardly from sublacustrine fan to braided river delta front and to braided river delta plain. This study provides basis for finding and evaluating lithologic hydrocarbon reservoir in the Fushan sag.
出处
《特种油气藏》
CAS
CSCD
2010年第5期30-32,共3页
Special Oil & Gas Reservoirs
基金
国家自然科学基金项目(40872077)
中国地质大学(武汉)教育部构造与油气资源重点实验室联合资助项目
关键词
重力流
湖底扇
鲍马序列
沉积模式
福山凹陷
gravity flow
sublacustrine fan
Bouma series
sedimentation model
Fushan sag
