高邮凹陷沙埝地区复杂地震资料的构造解释

在沙埝地区第三系地层中存在着2套辉绿岩侵入体，同时区内还发育有两期断裂系统，这使得该区的地震资料品质降代，构造落实困难。为些，开展了针对性的研究：①在地震资料特征分析的基础上，采用合成地震记录和速度分析相结合的多井多层次综合标定方法，解决了辉绿岩地区的层位标定问题；②从辉绿岩侵入期和断层活动期之间的关系入手，对2套辉绿岩穿过断层时的特征进行了分析，并对辉绿岩侵入区的断层进行了解释；③从形成机制上对两期断裂系统的组合关系及晚期断层对早期构造的影响进行了探讨。以上方法的采用有效地提高了地震资料的解释精度，根据新的解释成果，在沙埝地区北部部署的S40井和S42井均获得了高产工业油流。

Structure interpretation to complex seismic data in Shanian area of Gaoyou depression.

To improve the precision of structure interpretation, following methods were researched:based on seismic data character,comprehensive horizon calibration in multi-well integrating synthetic seismogram with velocity analysis has solved the problem of horizon calibration in diabase shielding area;starting with the study on relationship between period of diabase intrusion and fault activity,the characteristic of two diabases layers traversing fault was analyzed in fault in- terpretation;the relationship between two fault systems de- veloped in Shanian area and the influence of latter fault on early structure has been discussed from the mechanism.The comprehensive research has improved the precision of seismic interpretation.Desired results have been achieved in oil and gas exploration.