生物礁油藏速度建模方法探讨  

Velocity modeling method in reef reservoir

作　　者：周建楠 田建华 范廷恩 蔡文涛 倪军娥 

机构地区：[1]中海油研究总院,北京100028

出　　处：《地球物理学进展》2018年第1期347-352,共6页Progress in Geophysics

基　　金：国家重大专项"海上开发地震关键技术及应用研究"(2011ZX05024-001)资助

摘　　要：生物礁储层与围岩存在明显的速度差异,且储层内部非均质性强,速度空间变化复杂.通过模型正演确立井点在垂向各岩性段的速度变化模式,可以有效评估受构造和储层变化影响的多井时深关系质量.在此基础上尝试用地层格架和地震属性同时约束开展速度建模,分析对比生物礁油藏顶面及内部层序界面的构造精度.经盲井抽验和后续实钻井证实,总结出适用于类似油藏的速度模型方法.There are obvious differences in the speed of reef reservoir and surrounding rock,along with the strong heterogeneity inside the reservoir,the speed change is complex. The forward model established with structure and reservoir information can evaluate the time-depth relationship quality on multi-wells. On this basis, both stratigraphic framework and seismic attributes are considered in the velocity model development. The structural precision after time-depth conversion has been assessed to analyze the 3D velocity model building method. The subsequent real drilling results confirmed the structural precision with the forecast error in 10 meter,which prove the validity of 3D velocity modeling method applied in reef reservoir.

关 键 词：生物礁储层 非均质性 时深关系 速度建模 构造精度 

分 类 号：P631[天文地球—地质矿产勘探]