Gas reservoir identification by seismic AVO attributes on fluid substitution
Gas reservoir identification by seismic AVO attributes on fluid substitution
复制标题
流体替代地震AVO属性识别气藏
DOI：
10.1007/s11770-012-0323-7
复制
发表时间：
2012-07
影响因子：
0.7
通讯作者：
Li Jing-Ye
中科院分区：
文献类型：
--
作者：
Li Jing-Ye
传统上，在计算不同孔隙流体的储层弹性性质时，往往对测井资料进行流体替换。利用地震正演模拟计算了它们相应的地震响应，直接进行了气藏识别。该工作流程为我们提供了有关储层和地震的信息，但仅限于油井。对于真实的储层，储层参数如孔隙度、粘土含量和厚度随位置而变化。因此，仅在井处的传统流体替换的信息是有限的。通过假设一个岩石物理模型，将弹性性质与孔隙度和矿物学联系起来，我们在一个具有不同孔隙度、粘土含量和地层厚度的三层地球模型上进行了地震正演模拟和AVO属性计算。分析了湿储层AVO属性与非气储层AVO属性之间的关系。我们在正演模型中使用的假设框架内得出了它们的线性关系。它们之间的线性关系使得直接对地震AVO属性进行流体替代成为可能。最后，我们将这些线性关系用于地震数据上的流体替代，并通过地震数据的AVO属性与直接流体替代后的地震数据的AVO属性之间的交会图来识别气层。
Traditionally, fluid substitutions are often conducted on log data for calculating reservoir elastic properties with different pore fluids. Their corresponding seismic responses are computed by seismic forward modeling for direct gas reservoir identification. The workflow provides us with the information about reservoir and seismic but just at the well. For real reservoirs, the reservoir parameters such as porosity, clay content, and thickness vary with location. So the information from traditional fluid substitution just at the well is limited. By assuming a rock physics model linking the elastic properties to porosity and mineralogy, we conducted seismic forward modeling and AVO attributes computation on a three-layer earth model with varying porosity, clay content, and formation thickness. Then we analyzed the relations between AVO attributes at wet reservoirs and those at the same but gas reservoirs. We arrived at their linear relations within the assumption framework used in the forward modeling. Their linear relations make it possible to directly conduct fluid substitution on seismic AVO attributes. Finally, we applied these linear relations for fluid substitution on seismic data and identified gas reservoirs by the cross-plot between the AVO attributes from seismic data and those from seismic data after direct fluid substitution.
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影响因子：
3.3
作者：
Ying Zou;L. Bentley
通讯作者：
Ying Zou;L. Bentley
影响因子：
3.3
作者：
S. Singleton;R. Keirstead
通讯作者：
S. Singleton;R. Keirstead
影响因子：
3.3
作者：
R. Shuey
通讯作者：
R. Shuey
影响因子：
3.3
作者：
K. Spikes;J. Dvorkin;M. Schneider
通讯作者：
K. Spikes;J. Dvorkin;M. Schneider
影响因子：
3.3
作者：
C. P. Ross
通讯作者：
C. P. Ross