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首页> 外文会议>SPG(Society of Petroleum Geophysicists)/SEG(Society of Exploration Geophysicists) Kunming 2006 International Geophysical Conference; 20061027-29; Kunming(CN) >AVO application in gas reservoirs of Xujiahe formation, Sichuan Basin
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AVO application in gas reservoirs of Xujiahe formation, Sichuan Basin

机译：AVO在四川盆地须家河组气藏中的应用

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摘要

A comprehensive AVO analysis led to lithologic identification and reservoir characterization of the Xujiahe formation, Sichuan Basin. The AVO analysis includes assessment of the surface seismic dataset to investigate how well it meets the requirements for AVO inversion. Specifically, we examined the influence of the multiples that have remained in the data and the ambient noise on the AVO analysis. We compared the gathers from prestack time migration with synthetic records created at 13 well locations to check the presence and validity of AVO anomalies. Following the AVO inversion, we performed crossplot interpretation of the AVO attributes that include intercept and gradient, P- and S-wave reflectivities, pseudo-Poisson and P-wave reflectivity, P and G, and lamda-rho and mu-rho. From the AVO crossplots, we identified the top and bottom of a thick reservoir with high porosity. However, the AVO attributes failed to infer relatively thin reservoirs.
机译：综合的AVO分析导致四川盆地须家河组的岩性识别和储层表征。 AVO分析包括对地面地震数据集的评估，以调查其满足AVO反演要求的程度。具体来说，我们检查了残留在数据中的倍数和环境噪声对AVO分析的影响。我们将叠前时间偏移收集的数据与在13口井位置创建的综合记录进行了比较，以检查AVO异常的存在和有效性。在AVO反演之后，我们对AVO属性进行了交叉绘图解释，这些属性包括截距和梯度，P波和S波反射率，伪泊松和P波反射率，P和G以及lamda-rho和mu-rho。从AVO交会图中，我们确定了具有高孔隙率的厚油层的顶部和底部。但是，AVO属性无法推断相对薄的储层。

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