包日温都扇三角洲砂砾岩低渗透油藏小层沉积微相识别与制图

Identification and mapping of sedimentary microfacies of sublayer of low-permeability glutenite reservoir of Baori'erdu fan delta.

方法 针对陆西凹陷包日温都扇三角洲砂砾岩储层岩性岩相变化大、非均质性强的特点 ,利用测井相与沉积微相结合分析的方法对其储层进行了研究。目的 为该区储层小层沉积微相的识别、划分与制图创造条件。结果 在测井岩性相、曲线形态相和地质微相结合分析的基础上 ,建立了识别砂砾岩储层小层沉积微相单元的标准 ,并编制出小层沉积微相平面图。结论 将感应测井和声波测井两条曲线叠合 ,利用其相对幅度差值 (d)判断岩性 ,可达到有效识别砂砾岩复杂岩性岩相的良好效果。

Method\ In consideration of the characteristics of great variations of lithology and facies and strong homogeneity of Baori'erdu fan-delta and glutenite reservoir of Luxi depression, it is studied by combining logging facies with sedimentary microfacies. Purpose\ To prepare for identification, division and mapping of the sublayer sedimentary facies in the reservoir. Result\ The criteria identifying the sublayer sedimentary microfacies units are worked out, and sublayer sedimentary microfacies plan views are mapped based on composite analysis of logging lithologic facies, curve morphological facies and geologic microfacies. Conclusion\ The lithology can be identified using the relative difference of amplitudes(value d) resulting from the two curves stacking of induction logging and acoustic logging, so that the complicated lithologies and lithographic facies of glutenite are effectively determined.