陆相湖盆可容空间转换特征  

Characteristics of Accommodation Space Transformation of Lacustrine Basin

作　　者：杨伟利[1] 姜在兴[2] 孙波[3] 操应长[4] 于文泉[4] 孙钰[1] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国地质大学(北京),北京100083 [3]中国石化胜利油田分公司河口采油厂,山东东营257200 [4]中国石油大学(华东),山东东营257061

出　　处：《石油天然气学报》2010年第2期11-15,20,共6页Journal of Oil and Gas Technology

基　　金：国家"973"规划项目(2003CB214608);国家"十五"重大科技攻关项目(2001BA605A09)

摘　　要：陆相湖盆具有局限性、多物源、多沉积中心、差异性构造沉降等特点,可容空间在盆地内变化具有复杂性,其直接控制因素为构造沉降、沉积物供给和湖盆水体的变化。三者的相互关系导致可容空间的变化在盆地范围内为统一或在盆地不同地区其变化不同。断陷湖盆中,单一因素主控作用比较明显,博兴洼陷沙三中、下亚段层序皆为早期构造沉降主控,可容空间统一增加,晚期沉积物供给主控,可容空间变化不一致;坳陷湖盆中综合控制作用明显,松辽盆地青山口组沉积时期,在构造沉降和沉积物供给的控制下,经历了3期可容空间的非统一性变化。可容空间的非统一性变化对陆相湖盆层序地层学进行了补充和修正,是对层序地层学的新思考。Accommodation space change was complicated in lacustrine basin for its multi-material sources,multi-depocenters,differential tectonic subsiding and limited water area and so on. But tectonic subsiding,sediment supplying and water body played an important role. The accommodation space had the accordant changing in the basin,but it had the discordant changes in different areas. In faulted lake basin,accommodation space changes were dominated by single facter. During the early stage of the lower and middle members of Shahejie Formation in Boxing Sag,the accommodation space was dominated by tectonic subsiding and it increased in the whole sag,but at the later stage the sediment supplying was the main facter and made the accommodation change discordant. In the depression basin,the accommodation space change was influenced by the composited factor. In Songliao Basin,the accommodation space changes experienced three times affected by tectonic subsiding and sediment supplying during the mid-Cretaceous. The unified changes of accommodation space supplements and modifies the sequence stratigraphy of lacustrine basin.

关 键 词：可容空间转换 构造沉降 沉积物供给 坳陷湖盆 断陷湖盆 

分 类 号：P618.13[天文地球—矿床学]