【摘要】 油田开发进入中后期,含水率高,剩余油分布零散,油田稳产难度非常大。为进一步挖潜剩余油,预测井间砂体展布,掌握地下剩余油分布规律,迫切需要建立更为精确的地质模型。以垦西油田垦71断块密井网区为例,应用岩心、测井、地震及生产动态等多尺度资料,对河流相野外露头和现代沉积的原型模型进行分析,提出了点坝识别及精细解剖其内部构型的方法,确定了地下点坝垂向和平面上的识别标志。总结了点坝空间组合特征,应用经验公式、水平井及小井距资料确定了研究区侧积体和侧积层的规模及产状,在此基础上对研究区点坝内部构型进行解剖,最终建立了曲流河点坝三维构型模型。更多还原

【Abstract】 Most oil fields in the east China have been in the development of intermediary and later stage with high water content and dispersed distribution of remaining oil.The aim to keep stable production is extremely difficult for this kind of field.In order to exploit further remaining oil,and predict the distribution of sand bodies between wells,and understand the remaining oil distribution, the more accurate geologic model should be built urgently.Taking Ken71 fault block dense area of Kenxi oilfield in Shengli oil area as case,the multiscale data of coring,logging and performance of wells are used to analyze the former results about outcrop and modern deposition of meandering river.A comprehensive analysis method for reservoir architecture of point bar is proposed. The recognition mark of point bar in the studied area is determined.Air space combined pattern are summed up.The correlation between the length of point bar and the width of bank channel is derived.The three distribution patterns of lateral accretion shale beddings are summarized.The empirical formula,data of horizontal wells and dense wells are used to ascertain the scale and occurrence of lateral accretion of sandbody.The architecture of the point bar reservoir in the studied area is proposed.The research results are in good accordance with the performance data of ascertained well.The models of three dimensional reservoir architecture are constructed.更多还原