摘要
全方位共反射角道集可提供任意方位叠加产生的任意方位叠后地震数据体。根据垂直于断裂方位各向异性最强、平行于断裂方位各向异性最弱的原理检验了断裂的可靠性,认为平行断裂方位的叠后地震数据体能够最大程度地消除各向异性的影响,反映了断裂的真实特征。同时,利用全方位共反射角道集进行AVAZ反演并预测了地下微裂缝的发育程度及方向,其结果与研究区的实钻结果吻合良好。
Full-azimuth reflection-angle gather can provide any-azimuth post-stack seismic data volume which comes from the superposition of any-azimuth angle gather. According to the principles i. e. the anisotropy in the perpendicular direction to the faults is the strongest; while that in the horizontal direction is the weakest, the reliability of the faults is tested. The achievements show that the post-stack seismic data volumes which are parallel to the fault azimuth can eliminate the influences of the anisotropy to the largest extent and reflect the real characteristics of the faults. Meanwhile, using the full-azimuth common-reflection-angle gather, AVAZ inversion is conducted and moreover the developed degree and directions of the m underground micro-fractures are predicted. The achieve- ments possess much better coincidence with those of the actual drilling in the study area.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2015年第5期146-150,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
中国石油天然气集团公司重大科技专项(2012E-3002)
