双河油田扇三角洲前缘沉积微相特征及剩余油分布

Characteristics of Sedimentary Microfacies and Remaining Oil Distribution in Fan Delta Front of Shuanghe Oilfield

油田开发后期,储层沉积微相是控制剩余油分布的主要地质因素之一,微相砂体间储层物性的差异,决定了储量动用程度的差别。双河油田非均质严重,目前综合含水高达93%,采出程度35%以上,储量动用很不均衡。在对双河油田扇三角洲前缘沉积微相特征研究的基础上,利用分层动态测试、水淹层测井解释及数值模拟结果,分析了双河油田扇三角洲前缘不同沉积微相砂体内部储量动用状况及剩余油分布特征,对不同微相砂体提出了挖潜对策。

At the late stage of oilfield development sedimentary microfacies in the reservoir is the major geologic factor controlling the remaining oil distribution,the reservoir physical property is poor between sandbodies,which determines the difference of reserves producing level.Heterogeneity is severe in Shuanghe Oilfield,at present integral water content is over 35%,reserves producing is highly unequal.On the basis of studying the sedimentary microfacies of fan delta front in the oilfield,stratified dynamic test,logging interpretation of water-out reservoirs and the result of numerical simulation are used to analyzed the reserves producing status and the characteristics of remaining oil distribution within the sandbodies of different sedimentary microfacies in the fan delta front of the oilfield,thus the countermeasures for tapping the potential in different microfacies sandbodies are put forward.