摘要
重力流沉积体系已成为南海西部重点勘探领域。为系统开展莺歌海盆地东部黄流组重力流沉积体系成因及控制因素研究,利用钻井、测井、地震资料,通过位移-距离法、3Dmove古构造恢复等技术方法,对盆地东部中新世黄流组坡折类型、物源供给通道、盆地沉降等方面进行了综合研究。结果表明,盆地东部边缘走滑转换带大型沟谷发育,控制了主物源注入通道;挠曲坡折处坡度加大促发了重力流形成;大规模海平面下降与凹陷内异常沉降作用耦合控制了低位域重力流砂体分布;盆内底辟活动改变了微古地貌格局,从而影响了重力流沉积卸载位置。该成果认识为LD10-F井厚层砂岩气藏发现提供了理论支持。
Gravity flow sedimentary system has become a key exploration area in the western South China Sea.In order to systematically study the genesis and controlling factors of gravity flow sedimentary system of Huangliu Formation in eastern Yinggehai Basin,the slope break types,source supply channels and basin subsidence of the Miocene Huangliu Formation were comprehensively studied by means of drilling,logging and seismic data,displacement-distance method and 3 D motion paleogeomorphology restoration. The results show that large-scale valleys developed in strike-slip transition zone on the eastern margin of the basin controlled the main source injection channel,increased slope gradient at flexural slope break promoted the formation of gravity flow,coupling of large-scale sea-level decline and abnormal subsidence in depression controlled the distribution of gravity flow deposits of LST,and diapirism changed the micro paleogeomorphology,affecting the position of gravity flow deposits.This achievement provides theoretical support for the discovery of thick sandstone gas reservoirs in well LD10-F.
作者
刘为
杨希冰
张秀苹
段亮
邵远
郝德峰
LIU Wei;YANG Xibing;ZHANG Xiuping;DUAN Liang;SHAO Yuan;HAO Defeng(Zhanjiang Branch of CNOOC Ltd.,Zhanjiang 524057,Guangdong,China)
出处
《岩性油气藏》
CSCD
北大核心
2019年第2期75-82,共8页
Lithologic Reservoirs
基金
国家重大科技专项"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)"(编号:2016ZX05024-005)资助
关键词
古地貌
底辟
重力流沉积
黄流组
莺歌海盆地
paleogeomorphology
diapir
gravity flow deposits
Huangliu Formation
Yinggehai Basin
