塔河油田孔洞模型的波动方程正演模拟  

Wave equation forward modeling of cavern models in Tahe oilfield.

作　　者：闵小刚[1] 顾汉明[1] 朱定[1] 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074

出　　处：《勘探地球物理进展》2006年第3期187-191,共5页Progress in Exploration Geophysics

摘　　要：塔河油田碳酸盐岩缝洞型储层存在岩性致密、基质的孔隙度小、渗透率差、非均质性强的特点,要经济地勘探开发这些储层,应用裂缝和孔洞检测技术是一项重要和有效的手段。采用非均匀介质条件下导出的二维弹性波波动方程的交错网格有限差分格式,较好地应用吸收边界和稳定性条件,对塔河油田的多个不同类型的溶洞型储层模型进行数值模拟正演计算,并参照野外数据采集系统和处理流程,对共炮点记录进行处理,得到叠加和偏移剖面。通过对不同溶洞储层类型的地震响应与物性参数之间的关系分析,总结出了溶洞储集体在叠偏剖面上的反射特征,为实际地震资料的解释提供了依据。The carbonate fracture-cavity reservoirs of Tahe oilfield are characterized by tight lithology, low porosity in base rock, poor permeability, and strong heterogeneity. This paper implemented forward modeling of cavern models simplified according to the geology of Tahe oilfield using staggered finite difference of 2-D elastic wave equation for heterogeneous medium. Using the practical data processing flow, we obtained stacked and migrated sections. Based on an analysis of the relationships between seismic responses of different cavern reservoir and physical parameters, we summarized the reflection characters occurred on the stacked and migrated sections.

关 键 词：非均质性 交错网格 有限差分 吸收边界 数值模拟 

分 类 号：P631.4[天文地球—地质矿产勘探]