摘要
方正断陷是伊舒地堑主要油气勘探区之一。以地震、测井资料为基础,利用层序地层学研究方法,对方正断陷北部古近系地层进行了研究。选择了可信度较高的地震内部反射结构和外部几何形态,结合频率、振幅、连续性等参数,对地震相进行了划分。在研究区4个层序中共识别出席状平行亚平行地震相、楔形地震相、充填地震相、乱岗状地震相和前积地震相等多种地震反射类型。受构造和沉积影响,各种地震相在平面分布上具有差异性,在垂向演化上具有继承性。经过测井资料标定,将地震相转化为沉积相,划分出深湖-半深湖、滨浅湖、扇三角洲平原、扇三角洲前缘、浊积扇等沉积相,预测出了有利沉积相带。
Fangzheng fault depression is one of the most important hydrocarbon exploration area in the yi-shu garbon.Based on the seismic and logging data,using the sequence stratigraphy method,seismic facies of Paleogene in fangzheng fault depression are divided and named mainly on the basis of the reliable internal reflection texture and external shape of the seismic sequence unit.Amplitude,continuity and other seismic parameters are also used in the description of seismic sequence units.In the study area,four seismic sequences are divided and more than five seismic facies are identified,including parallel-subparallelmat-shaped,wedge shaped,filling,hummocky and foresee seismic facies,which show differentiation in spatial distribution and hereditability in vertical evolution.The sedimentary facies include semideep-deep lake sub-facies,shallow lake and shore sub-facies,fan-delta plain sub-facies,fan-delta front sub-facies and turbidite,etc.The favorable areas are identified.
出处
《科学技术与工程》
2011年第9期1906-1911,共6页
Science Technology and Engineering
基金
黑龙江省研究生创新科研资金项目(YJSCX2009-079HLJ)资助
关键词
方正断陷
层序地层学
地震相
古近系
fangzheng fault depression sequence seismic facies paleogene
