地震属性在辽河盆地H块储层预测上的应用

Application of Seismic Attribute to Reservoir Prediction of H Area in Liaohe Basin

针对辽河盆地H块大Ⅱ1砂岩组井间砂体不明朗的现状,提出了运用地震属性优化技术预测储层的方法。沿相应的地震同相轴,提取了30余种以同相轴为基础的地震属性。对地震属性与储层厚度的敏感性、各属性间的相似性以及地震属性与井点砂岩厚度的相关性进行逐一分析,优选出与本区井点砂岩厚度相关系数较高的几种地震属性。通过多元线性回归的方法,对不同的地震属性组合进行多次尝试,优选了用于储层预测的最佳组合,建立了本区储层厚度预测模型,从而计算出各属性点的预测砂岩厚度,并加以验证。结果显示,利用此回归方法预测的10口井的砂岩厚度,与实际井点砂岩厚度吻合较好。最终预测出井间砂体的发育情况,指出储层发育的有利位置,为本区下一步的井位部署提供依据。

An optimizing method by using seismic attributes is proposed to predict the reservoir against the uncertain status of sand body of BigⅡ1 sand group of H Area in Liaohe Basin. Along the corresponding seismic axis,more than 30 species seismic attributes were extracted based on the phase axis,and then the sensitivity with the seismic attributes and the reservoir thickness,the similarity of each seismic attribute,and the correlation between the seismic attributes and well points sandstone thickness were analysed respectively. The seismic attributes with higher correlation coefficient between well point sandstone thickness in the research area were optimized. Using the method of multivariate linear regression,the different combinations of seismic attributes were tried several times,the best combination for reservoir prediction was optimized,and reservoir thickness prediction model was established in this area,and the predictable sand thickness of each attribute points were calculated and verified. The results showed that the predictable sandstone thickness have a good agreement with the actual sandstone thickness by using this regression in 10 wells. And the development of the situation and its favorable reservoir development location in the sandstone among wells were predicted,which provided basis for the next well deployment in this area.