石油与天然气地质 ›› 2011, Vol. 32 ›› Issue (3): 375-381.doi: 10.11743/ogg20110309

• 石油与天然气地质 • 上一篇    下一篇

井-震结合进行河流相储层非均质性表征——以渤海湾盆地黄河口凹陷渤中263油田为例

  

  • 出版日期:2011-06-28 发布日期:2011-09-23

Heterogeneity characterization of fluvial facies reservoirs through integration of seismic and logging data —an example from Bozhong263 oilfield in the Huanghekou Sag, the Bohai Bay Basin

  • Online:2011-06-28 Published:2011-09-23

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摘要：

摘要：针对渤海湾盆地黄河口凹陷渤中263油田明化镇组下段浅水三角洲水下分流河道多期次砂体表现出的强烈非均质性，综合应用井-震数据、采用多种方法进行储层平面非均质性定量描述，并体现到地质建模和井位部署中，以降低储量风险、落实潜力、优化开发井位、指导ODP方案（整体开发方案）的编制和决策。岩石物理分析发现，该油田以密度反演为主的拟阻抗可以很好地反映砂、泥岩的变化。通过阻抗体上提取的振幅和相干信息，可以识别平面岩相变化、废弃河道、点坝以及小断层分布。这些信息可以在属性模拟时约束平面渗透率变化。对于强不连续位置，还可以设置虚拟断层以表征砂体内部的不连通性。利用短时窗傅氏变换频谱分解技术以及差异频谱所反映的吸收衰减现象，在频率域通过调谐振幅的成像特征研究了储层横向变化规律，定量求取了砂体厚度，并成功检测了含油气砂体。

关键词: 关键词：频谱分解, 井-震数据, 地质建模, 井位部署, 储层平面非均质性, 砂体厚度, 渤海湾盆地

Abstract:

Abstract: Strong heterogeneity exists in multistage sandstone reservoirs of underwater distributary channel microfacies of shallow water delta in the lower Minghuazhen Formation in the Bozhong263 oilfield,Bohai Bay Basin.In this paper,we quantitatively describe the plane heterogeneity of reservoirs through integration of seismic and logging data.The quantitative description of heterogeneity is then to be taken into consideration in geologic modeling and well emplacement,so as to reduce reserve risk,confirm the resources,optimize the location of development wells,direct the composing of Overall Development Plan and make other decisions.Petrophysical analysis indicates that the pseudoimpedance can differentiate the variety of sandstone and shale perfectly.The amplitude and coherence information extracted from the impedance volume can be used to identify the plane variety of lithofacies and the distribution of abandoned channel,point bar,and small faults.They also can be used to constrain the variety of plane permeability during petrophysical modeling.Some virtual faults can be introduced to reflect the interior disconnectivity of sand body.Besides,by using the spectral decomposition technique deriving from short time window Fourier transformation and the absorbing attenuation phenomenon in differential frequency spectrum,this paper studies the latteral variety of reservoir,quantitatively calculates their thickness.Hydrocarbonbearing sand body is successfully detected in this way.