基于波动方程正演模拟的多尺度地震资料反射特征分析

发布时间：2018-12-26 15:46

【摘要】：地面地震、VSP和井间地震等多尺度地震资料在油气勘探开发中发挥着重要的作用,但不同的观测尺度和资料采集处理方式限制了多种资料之间的有效匹配和综合应用.通过对同一地质体模型采用波动方程开展正演模拟分析,进一步开展逆时偏移有利于更好地建立起多尺度地震资料之间的联系与差异.分析表明,地面地震、VSP和井间地震等不同尺度下的观测资料都能在对应的范围内准确反映地质体的地震反射特征,而观测尺度和观测方式的不同则导致多尺度地震资料在分辨率、波场信息丰富程度和观测范围等方面存在差异;正演模拟地震道的时频分析进一步表明多尺度地震资料在时间域和频率域都存在着较好的联系,特别是井间地震和VSP等井中地震资料能够提供更为合理、可靠的高频信息,在提高地面地震资料分辨率方面具有明显的优势,为开展多尺度地震资料的综合研究与应用提供了基础.
[Abstract]:Multi-scale seismic data such as surface earthquakes, VSP and cross-well earthquakes play an important role in oil and gas exploration and development, but different observation scales and data acquisition and processing methods limit the effective matching and comprehensive application of many kinds of data. By using wave equation to carry out forward modeling analysis of the same geological body model, the further development of inverse time migration is beneficial to the establishment of the relationship and difference between multi-scale seismic data. The analysis shows that the seismic reflection characteristics of geological bodies can be accurately reflected by the observed data at different scales such as surface earthquakes, VSP and cross-well earthquakes. The difference of observation scale and observation mode leads to the difference in the resolution of multi-scale seismic data, the rich degree of wave field information and the observation range. The time-frequency analysis of forward simulated seismic traces further shows that there is a good relationship between multi-scale seismic data in time domain and frequency domain, especially the cross-well seismic data and VSP well seismic data can provide more reasonable and reliable high-frequency information. It has obvious advantages in improving the resolution of surface seismic data and provides a basis for the comprehensive research and application of multi-scale seismic data.
【作者单位】：中国石油大学(华东);海洋国家实验室海洋矿产资源评价与探测技术功能实验室;中石化胜利油田分公司油气勘探管理中心;
【基金】：国家重点基础研究发展计划(973)课题(2013CB228604) 山东省自然科学基金(ZR2014DM009)联合资助
【分类号】：P631.44

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