摘要
在地震相和钻井资料研究的基础上,结合区域地质背景,对研究区上新统和下更新统的层序地层学及沉积特征进行了分析。结果表明,该区上新统可划分为3个三级层序,下更新统为1个三级层序。研究区深海平原地区每个层序的不整合面之上依次发育低位体系域、水进体系域和高位体系域,深海平原和陆坡地带低位体系域发育深水扇沉积,主要类型包括海底扇和斜坡扇沉积,经典的海底扇和斜坡扇属于水道化沉积体系,此外,该区还发育非水道化的滑塌体沉积。通过深水扇沉积特征的分析,弄清深水扇的类型与分布规律,对该区深水油气勘探具有重要的指导意义。
The paper analyzes sequence stratigraphy and sedimentation characteristics of the Pliocene and lower Pleistocene in the study area based on the study of seismic facies and drilling data combined with regional geological background.The results show that the Pliocene is divided into 3 three-level sequences and the lower Pleistocene is divided into one three-level sequence.In the studied area,LST,TST and HST grow successively above unconformity face of each sequence of deep sea plain;and deep water fan sedimentation grow in LST of deep sea plain and continental slope area.The sedimentation mainly includes the sedimentations of submarine fan and slope fan,in which classical submarine fan and slope fan belong to the distribution regularity of water channel type.Besides,slumping body of water channel type grows in this area.Analyzing the sedimentation characteristics of deep water fan and clarifying the types and distribution of deep water fan is significant to the exploration of oil and gas under deep water in this area.
出处
《特种油气藏》
CAS
CSCD
北大核心
2012年第6期45-48,143,共4页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"西非及亚太地区被动大陆边缘盆地油气勘探开发一体化技术项目"(2008ZX05000)
关键词
沉积特征
海底扇
斜坡扇
滑塌体
孟加拉湾盆地
sedimentation characteristic
submarine fan
slope fan
slump body
Bengal Bay Basin
