CAJ | 학술논문

东濮凹陷属断陷型盆地,沉积环境多变、断块破碎、构造复杂,局部构造主要受断层控制,断层两侧同一时代地层由于埋深不同,导致在大断层附近存在较大的速度横向变化.而时间偏移不能解决速度横向变化的问题,东濮凹陷今后构造勘探的主要目标是小断块和小幅度构造,所以在本区中应用了各向异性叠前深度偏移,在叠前深度偏移基础上,把时间偏移道集的高密度速度分析结果与声波测井资料相结合,形成一套各向异性参数求取方法,通过基于各向异性的叠前深度偏移改善了地震与钻井的吻合度.
동복요함속단함형분지,침적배경다변、단괴파쇄、구조복잡,국부구조주요수단층공제,단층량측동일시대지층유우매심불동,도치재대단층부근존재교대적속도횡향변화.이시간편이불능해결속도횡향변화적문제,동복요함금후구조감탐적주요목표시소단괴화소폭도구조,소이재본구중응용료각향이성첩전심도편이,재첩전심도편이기출상,파시간편이도집적고밀도속도분석결과여성파측정자료상결합,형성일투각향이성삼수구취방법,통과기우각향이성적첩전심도편이개선료지진여찬정적문합도.
The Dongpu depression is a faulted basin with versatile depositional environment,broken fault-blocks and complicated structures.Its local structure is controlled by faults.There are major lateral velocity alternations because of different buried depths of contemporaneous strata in the two sides of faults.But time migration is unable to work out this problem,so anisotropic pre-stack depth migration has been applied to this area,and high density velocity analysis is ombined with acoustic logging data.The results show coincidence of seismic and drilling with anisotropy PSDM.