黄骅坳陷马东地区古近系重力流水道相储层特征研究

通过岩心、测井、地震等多信息综合,对黄骅坳陷马东地区古近系沙一中、下亚段重力流水道相储层进行了精细研究,划分为水道中心、水道边缘及漫溢、河道间及湖盆泥3种微相类型,并依据地震属性分析和测井约束反演结果预测各层砂体分布.统计表明,单期水道宽度为500～1000m,平均厚度3m左右,并具有分叉、合并、连片、并行等多种组合方式,在垂向上多期叠加构成复合水道砂体.在多参数分析的基础上,通过渗透率累积概率分析有效地对储层进行了分类,可为马东地区的开发方案调整提供地质依据.

Study on the reservoir characteristics of the Paleogene gravity flow channel facies in Madong district of Huanghua Depression

The Paleogene gravity flow channel reservoir is studied in detail through the comprehensive analysis of the rock core,well logging,seismic data,etc.It is held that there are three microfacies in the reservoir:channel center microfacies,channel margin and gravity channel microfacies,and channel inter and lake mud microfacies.The special distributions of every microfacies are predicted according to seismic attribute analysis and logging constrained inversion.Statistics result shows that the single-phase gravity channel width is 500～1 000 m,and its average thickness is about 3 m,and the complex channel sandbody is formed by bifurcating,merging,pieces-linking,paralleling,etc.on plane and vertical multi-stage superimposition.Based on the multi-parameter analysis,the reservoir is divided into three types according to the cumulative probability analysis of permeability.Their distribution is presented,which can provide guidance for the adjustment of the development scheme of Madong district.