【摘要】 随着很多油田进入开采后期,开采的难度逐渐增加,在这种情况下,砂泥岩薄互层的研究与评价越来越受到重视.在地震勘探中,目前对于薄互层主要利用的是地震属性进行解释,而不同的地震属性必然会随砂泥岩厚度和接触关系变化而变化,因此有必要研究砂泥岩厚度及接触关系变化给地震属性带来的影响.本文以某油田实际剖面为基础,通过不断缩小两列砂体间距,直至相互穿插,建立了六个砂泥岩互层模型,并对这六个模型进行波动方程正演模拟和属性提取,分析五大类五十种地震属性随砂体移动的变化情况,挖掘对砂体预测比较敏感的地震属性,为属性优选提供依据,从而合理的运用不同的地震属性来预测砂体厚度变化情况及接触关系,减少地震解释假象存在的几率,提高储层预测的精度.更多还原

【Abstract】 With many oilfield enter the late stage of production,the difficulty of mining increased gradually.In this case,the thin interbeds of sandstone and mudstone is paid more and more attention to research and evaluation.In seismic exploration,the thin layer mainly use seismic attribute to interpretation,Different seismic attribute is changed to sandstone and mudstone thickness and contact relationship,Therefore,it is necessary to research the relationship between the seismic attribute Influence and sandstone and mudstone thickness and contact changing.This paper base on one oilfield practical profile,By shrinking two columns of sand body distance continually,until interpenetration each other,establishing six sandstone and mudstone interbed models,and wave equation forwarding and extracting attributes in six models,Analysis five categories fifty kinds of seismic attributes change condition along with the sand body movement,Search sensitive seismic attributes about sand body prediction,provide the basis for optimization of seismic attributes,Thus reasonable using various seismic attributes to predict the changes of thickness of sand body and the contact relationship,reduce the seismic interpretation existence probability,improve the precision of reservoir prediction.更多还原