地震多属性拟合技术在粗粒扇体沉积相图编制中的应用——以玛131井区百口泉组二段为例

发布时间：2019-01-08 11:22

【摘要】：由于砾岩岩石类型复杂,储层非均质性强,难以建立地震属性与储层之间的一一对应关系,导致应用地震属性常常具有不确定性和多解性。为了克服单一属性反映粗粒沉积展布的片面性,同类属性间相关信息的彼此干扰性,地震相预测扇体分布的盲目性,针对性的提出了基于地震多属性拟合技术编制粗粒扇体沉积相图的方法:1)建立岩性识别图版;2)属性优化与线性逐步回归拟合含砂砾率;3)均方根振幅属性正态分布约束砂体边界;4)应用拟合含砂砾率等值线图,结合岩相和测井相编制粗粒扇体沉积相图。并将该方法用于玛131井区百口泉组二段的沉积研究中,为研究粗粒扇体沉积提供了新的思路,为玛湖滚动勘探及井位论证提供了可靠地质依据。
[Abstract]:Due to the complexity of conglomerate rock types and the strong heterogeneity of reservoir, it is difficult to establish one-to-one correspondence between seismic attributes and reservoirs, which leads to uncertainty and multi-solution of seismic attributes. In order to overcome the one-sidedness of the single attribute reflecting the distribution of coarse grain deposits and the interference of correlation information among the same attributes, the seismic facies can predict the distribution of fan body blindly. A method of compiling sedimentary facies diagram of coarse fan body based on seismic multi-attribute fitting technique is put forward: 1) establishing lithology identification chart; 2) attribute optimization and linear stepwise regression fitting sand gravel ratio; 3) mean square amplitude attribute normal distribution constrained sand body boundary; 4) fitting sand gravel ratio isoline map, combining lithofacies and logging facies to compile sedimentary facies diagram of coarse grain fan. The method is applied to the sedimentary study of the second member of Baikouquan formation in Ma131 well area, which provides a new idea for the study of coarse fan sedimentation, and provides a reliable geological basis for the rolling exploration of Mahu Lake and the demonstration of well location.
【作者单位】：中国地质大学能源学院;中国石油新疆油田分公司实验检测研究院;中国石油新疆油田分公司勘探开发研究院;
【基金】：国家自然科学基金项目(41472091)~~
【分类号】：P618.13;P631.4

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