苏里格气田苏X井区盒8段砂体识别及含气性预测研究

苏里格气田苏X井区盒8段储层非均质性强，常规预测方法效果差。为了进行研究区砂体识别及含气性预测，提出了一种综合叠前及叠后2类储层预测技术优势的联合预测方法。首先，应用叠后地震属性分析及岩性随机反演方法，进行了盒8段砂体识别，在此基础上，结合沉积特征分析确定了研究区盒8段的沉积微相展布规律；其次，借助地震子波吸收系数分析、AVO分析及叠前弹性参数反演3种方法得到含气性分析成果，在剖面上进行了异常点段的含气性解释；最后，综合盒8期沉积微相的平面分布特征及剖面上的含气性分析成果，对研究区含气有利区进行了综合评价。实际钻井结果表明：该联合预测方法较好地克服了单一常规预测方法的不足，有效地降低了预测结果的不确定性，取得了较佳的预测效果，为进一步的勘探开发部署提供了更为可靠的依据。

Research on Sand Body Identification and Gas Bearing Area Prediction of He-8 Member in SU X Well Block of Sulige Gas Field

Reservoir of He-8 Member in SU X well block of Sulige gas field has strong heterogeneity,and conventional prediction methods is not satisfactory.Therefore,in order to identify sand body and predict gas bearing block in the research area,prestack and poststack reservoir prediction methods were used in the paper.Firstly,seismic attributes analysis and lithologic stochastic inversion were comprehensively used for sand body identification.On the basis of identification result and the analysis of the sedimentary characteristics,the distribution law of sedimentary microfacies of He-8 Member in the research area has been determined.Secondly,by comprehensively utilizing the results of seismic wavelet absorption coefficient analysis,AVO analysis and pre-stack elastic inversion,gas bearing potential for anomalies was interpreted on the section.Finally,combined with sedimentary microfacies distribution characteristic of He-8 Member and gas bearing analysis results,gas bearing block was synthetically evaluated.Drilling result shows that the multiple prediction method is good,complementing the disadvantages of each other,reducing the uncertainty of prediction results and providing a reliable basis for further development and deployment.