摘要
莺歌海盆地的莺歌海凹陷是富生烃凹陷,在其东方区黄流组海底扇的勘探已发现大气田,应进一步往深层探索梅山组海底扇。基于东方区的钻井资料和三维地震资料,以经典层序地层学为指导,分析东方区梅山组海底扇的物源特征、外部形态特征、内部期次划分、控制因素及勘探潜力。综合考虑坡折带、区域海平面变化及充足的物源供应等因素对海底扇的控制,建立了东方区梅山组"双向物源、坡折控扇、低洼汇聚"的沉积模式。盆地发育东西双向物源,在东方区对应发育东西物源海底扇。东西两个方向的大型海底扇在纵向上均可分为3期扇体,垂向上各期扇体相互叠置,具有良好的油气成藏条件。
Yinggehai sag inYinggehai Basin is hydrocarbonrich sag.Large gas fields have been discovered in the exploration of the submarine fan of the Huangliu Formation in Dongfang area,and the submarine fan of the Meishan Formation should be further explored.Based on the drilling,3 D seismic data of Dongfang area,the provenance characteristics,external morphological characteristics,internal division,control factors and the exploration potential of submarine fan are analyzed in Meishan Formation in the Dongfang area,guided by classical sequence stratigraphy.Consideringthe slope fold zone,regional sea level change and the control of the submarine fan with sufficient source supply,the sedimentary model of″two-way source of east and west,fan controlled by the slope folding,and submarine fans converge at low altitudes″in Meishan Formation ofDongfang area is established.Yinggehai Basin has the developmental characteristics of two-way source,and the east-west provenance submarine fan develops correspondingly in Dongfang area.The large submarine fan in the east and west directions can be divided into three stages in the vertical direction,and the fans in each stage are superimposed on each other in the vertical direction,which have good oil and gas accumulation conditions.
作者
焦祥燕
罗泉源
张建新
陈杨
刘为
JIAO Xiangyan;LUO Quanyuan;ZHANG Jianxin;CHEN Yang;LIU Wei(Zhanjiang Branch of CNOOC,Zhanjiang Guangdong 524057,China)
出处
《重庆科技学院学报(自然科学版)》
CAS
2021年第3期35-39,共5页
Journal of Chongqing University of Science and Technology:Natural Sciences Edition
基金
国家科技重大专项“莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)”(2016ZX05024-005)。
关键词
莺歌海盆地
莺歌海凹陷
东方区
梅山组
海底扇
沉积特征
Yinggehai Basin
Yinggehai sag
Dongfang area
Meishan Formation
submarine fan
sedimentary characteristics