测井及地震综合技术在准噶尔盆地克303井区岩性圈闭勘探中的应用

Application of Logging and Seismic Integrated Technology in Lithologic Trap Exploration of Wellblock K 303 in Junggar Basin

随着勘探程度的不断提高,构造圈闭基本已被探明,此时岩性圈闭的勘探便显得尤为重要。以准噶尔盆地中克303井区三叠系百口泉组岩性圈闭的勘探为例,探讨了综合应用测井解释、地震属性分析、谱分解、层拉平等地震技术进行岩性圈闭勘探的方法。首先,针对老井应用先进的测井解释技术进行复查,以发现漏失的砂体;其次通过精确的层位标定确定其纵向位置,根据反射同相轴的异常对其加以识别;最后综合运用地震属性分析技术、谱分解技术、层拉平技术等多种地震技术共同对该岩性圈闭加以表征,确定其平面的展布范围及含油气性等。

With the continuous improvement of oil exploration,the structural traps were basically clarified,therefore it was more important to search the structural traps.By taking the exploration of Triassic lithologic trap of Baigouquan Formation in Wellblock K 303 in Junggar Basin as an example to discuss the methods of comprehensive application of logging interpretation,seismic attribute analysis,spectral decomposition,layer leveling.First of all,it uses the advanced log interpretation method to research the old wells to recheck the neglected sandbodies.And then vertical positions are determined by using precise horizon marking method,and it is recognized by the abnormal events.Finally,the techniques of seismic attribute analysis,spectral decomposition and layer leveling are deployed to characterize the lithologic traps to determine the plain distribution and oil-bearing property.