【摘要】 采用的定量识别技术对地层单元进行识别,充分利用地震属性信息,进行属性体约束下的层序界面自动追踪,借助Wheeler域转换实现层序单元定量划分。通过无井控条件下的恩平凹陷古近系文昌组的地震层序地层单元定量识别研究,建立等时地层单元及组合形态的地质模式,识别出2个准二级层序,并进一步划分出6个三级层序(SQ1～SQ6);以SQ6层序为例,对其最大洪泛面进行定量识别,进一步将SQ6层序高位体系域复合前积体分为Ⅰ幕与Ⅱ幕,2幕前积体内各识别出2期次一级沉积体。研究结果表明:定量识别技术在无井区可识别三级层序界面、体系域界面以及典型沉积体内幕期次,效果良好。更多还原

【Abstract】 The technology of quantitative recognition was applied in seismic sequence stratigraphic unit.Using the seismic attribute information,the sequence interfaces under the control of the steering cube were auto-track,and the quantitative subdue sequence units in virtue of Wheeler-transformed domain was realized.With the limitation of insufficient well,based on the technique of quantitative recognition,the geological models of basic unit and combined form of isochronous stratum were established.Two sub-second-order sequences which can be subdivided into six three-order sequences SQ1-SQ6 from base to top can be recognized in the strata of Wenchang Formation,Paleogene, Enping sag.As an example,based on the quantitative recognition of maximum flooding surface within the sequence SQ6, the progradational complex of highstand system tracts can be subdivided into two stages(ⅠandⅡ)and four sub-order sedimentary bodies.The results show that quantitative recognition technology can provide a good way to identify three-order sequence boundaries,system tract boundaries and the inner stages of a typical deposition.更多还原