裂缝型储层时空双变正演模拟研究  

The dual-variable in time-space forward modeling studies on fractured reservoirs

作　　者：李振春[1] 李庆洋 黄建平[1] 李娜[1] 田坤 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,青岛266580

出　　处：《地球物理学进展》2014年第3期1183-1188,共6页Progress in Geophysics

基　　金：国家973课题项目(2014CB239006);国家自然科学基金(41104069;41274124);中央高校基本科研业务费专项资金(14CX06072A)联合资助

摘　　要：本文将深层裂缝型储层视为各向同性背景下的小尺度非均质体,采用时空双变正演模拟算法模拟其地震响应,并将Lanczos滤波算子推广到该算法中,在保证最优的计算效率及内存的前提下,解决了常规变网格算法长时间采样下的不稳定问题.测试结果验证了本文算法对深层微构造的模拟精度及效率.最后将本算法应用到裂缝储层正演模拟中,定量分析了不同裂缝开度、密度和倾角下的地震振幅响应规律,为裂缝型储层的检测和解释提供了可靠的理论指导.This paper takes deep fractured reservoirs as small scaled heterogeneity embedded in a isotropic background,and then adopts the dual-variable in time-space forward method to simulate the seismic response of fractured reservoirs.Furthermore,we introduced in Lanczos filtering algorithm which can not only solve the instability phenomenon arise in conventional variable grid method under long sample time,but also keep the optimal computational efficiency and memory.The results verified that the modified method can model microstructure in deep with high accuracy and efficiency.Finally,we applied our method to simulate the seismic response of fractured reservoirs and analysis the relationship between seismic response and different aperture,density,and dip of fractures quantitatively,all of these can provide reliable theoretical basis for fracture detection and interpretation.

关 键 词：时空双变 正演模拟 Lanczos滤波 裂缝密度 稳定性 

分 类 号：P631[天文地球—地质矿产勘探]