作　　者： ; ; ; ; ;

机构地区： 中国科学院广州地球化学研究所

出　　处： 《西南石油大学学报（自然科学版）》 2011年第1期21-24,8-9,共4页

摘　　要： 陆相断陷湖盆陡坡带常发育多种砂体,由于其地震反射特征的特殊性,干扰了反转构造的识别。结合孤北洼陷五号桩断层带正反转褶皱和高青地区高青—平南断层正反转构造实例,分析了反转构造的地震反射特征,运用钻井资料进行地层细分和对比,声波时差进行剥蚀量的计算,流体包裹体的性质判断构造应力性质。五号桩断层带正反转褶皱地震反射特征呈现上凸下凹的外形,上部地层中间厚、两翼薄,且褶皱顶部遭受剥蚀,同相轴削蚀现象明显,下部地层保留了断陷盆地沉积充填特征;钻井资料亦显示背斜核部遭受剥蚀;声波时差随深度变化的关系曲线在剥蚀段明显错开。高青—平南断层发现了表征张性和压性环境的两类包裹体。多种方法相互约束可提高反转构造识别的准确率。 Steep slope of continental rift lake basin always develops a variety of sand bodies.They interfere with inversion structure recognition because of their particularity of seismic reflection characteristics.With examples of positive inversion folds of Wuhaozhuang fault zone in Gubei Sag and Gaoqing-Pingnan positive inversion fault in Gaoqing areas,the paper analyzes the seismic reflection characteristics of the inversion structure and formation subdivision and correlation with drilling data.The amount of erosion is calculated by acoustic time and tectonic stress characters are determined by fluid inclusions.The seismic reflection characteristics of positive inversion fold appear on the concave-convex shape in Wuhaozhuang fault zone,and the upper strata are thick in middle,thin in wings.The top of the fold suffers erosion,and reflection events cut significantly.The lower strata preserve filling characteristics of rift basin.Drilling data also show that the anticline core is denuded and acoustic time curve changes significantly in the denuded segment.Two types of inclusions developed in tensional and pressure environment in Gaoqing-Pingnan faults are found.The accuracy of inversion structure recognition is raised with a variety of mutually constraint methods.

关 键 词： 反转构造 声波时差 流体包裹体 济阳拗陷 地震反射特征

领　　域： [石油与天然气工程]