叠前同步反演技术在渤海海域QHD29-2区块油气预测中的应用

针对渤海海域QHD29-2区块主要含油气层段埋深大、地震资料纵向分辨率低,采用叠前AVO同步反演技术对该区块进行储层预测.通过精细的岩石物理分析,选取反映目的层段岩性和流体敏感的弹性参数进行交会分析.结果表明:泊松阻抗(PI)属性为目标区岩性敏感弹性参数;拉梅常数为最敏感流体弹性参数,能够有效判别储层的流体性质.在此基础上进行叠前AVO同步反演,预测QHD29-2区块东营组三段流体的展布范围,预测结果与评价井D井实钻情况吻合,证实该反演方法具有实用性和有效性.

Application of pre-stack simultaneous inversion technique in the hydrocarbon detection of QHD29-2 area in Bohai Sea

The main target in the QHD29-2 area in Bohai Sea was buried deeply with low-resolution data.Then the pre-stack simultaneous inversion method was used to identify reservoir and its fluid properties.Based on detailed analysis on the petrophysical characteristics,we carried out detailed cross-plot analysis of different elastic parameters from well logs in the main target.The result shows that PI attribute can recognize the main reservoir of QHD29-2 area and Lambda attribute can predict the fluid properties.A good application effects was achieved by using this method to the distribution range of fluid inthe 3rd member of Dongying Formation in QHD29-2 area.Actual drilling of QHD29-2-D well designed according to the method in the paper consistent with the inversion results.And it is proved that the practicality and efficiency of hydrocarbon detection can be achieved with this method.