摘要
为了在多波地震资料解释过程中解决多波信息识别难的问题,基于弹性波正演技术,针对某油田勘探区块的实际储层地质模型,采用高阶交错网格差分技术正演模拟非零偏炮集多波地震记录,并经多波资料处理,得到纵波和转换波CMP和CCP叠前含AVA的动校正道集及叠加剖面。在已知模型的AVA计算、模型层位参数与正演纵、横波波场关系的基础上,对比研究了正演记录中各储层的纵波和转换波对应关系。对比分析结果表明,数值模拟结果与AVA分析结果吻合,同一储层的纵波和转换波波场响应有明显差异。
In the process of accurate interpretation of multi-wave seismic data to solve the problem of multi-wave information recognition. Based on the techniques of elastic wave forwarding, aiming at the reservoir geological model of some oil field exploration area, we use the high-order staggered-grid difference technology to simulate many shots seismic records of the nonzero offset shot gathers, implement the multi-wave seismic data processing to acquire the CMP of P wave and converted wave, NMO trace gathers ofCCP prestack including AVA information, and superposition profiles. Based on the AVA calculation of the model, the layer parameters of the model, and the forwarding wave fields relation of the P-S wave, we also compare, and research the corresponding relation between the P wave and the converted wave. The results of analysis show that the simulation results and AVO analysis results are consistent. The significant wave field differences of between P wave and converted wave in same reservoir are existed, which are helpful to recognize and interpret the multi-wave information in this area, and make use of the multi-wave data to provide the important guiding significance for the reservoir prediction.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第2期65-71,共7页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家科技重大专项"近海隐蔽油气藏勘探技术"(2008ZX05023-002)
关键词
多波多分量
波场特征
层位
正演
交错网格
multi-wave and multi-component
wave field characteristics
formation
modeling forward
staggered-grid
