玛湖凹陷百口泉组粗碎屑粒度特征与环境指示意义

发布时间：2018-04-01 16:33

本文选题：粒度特征　切入点：弗里德曼离散　出处：《东北石油大学学报》2017年02期

【摘要】：现有粒度分析方法难以表征玛湖凹陷百口泉组粗碎屑粒度特征。在岩心观察和沉积相分析基础上,结合薄片分析,建立玛湖凹陷百口泉组粗碎屑粒度概率累积曲线,以及粗粒碎屑沉积环境的弗里德曼模式图,确定概率累积曲线和流体性质关系。结果表明,研究区粒度概率累积曲线可分为6类,分别对应碎屑水道、辫状水道、辫状分支水道、水下分流河道、河口坝和前扇三角洲沉积微相环境;随着流体性质由富砾碎屑流—颗粒流—富砂碎屑流—洪流—牵引流,粒度概率累积曲线依次出现宽缓上拱式—低斜多跳一悬式—直线式—低斜两段式—两跳一悬三段式—低斜三段式—典型两段式;随着流体由碎屑流逐渐向牵引流过渡,曲线斜率逐渐增大。该研究结果可为以粗碎屑为主的储层区块沉积环境研究提供参考。
[Abstract]:On the basis of core observation and sedimentary facies analysis, the probability accumulation curve of coarse clastic grain size of Baikouquan formation in Mahu sag is established based on core observation and sedimentary facies analysis. The Friedman model diagram of coarse clastic sedimentary environment is used to determine the relationship between probability accumulation curve and fluid properties. The results show that the probability accumulation curve of grain size in the study area can be divided into six categories, corresponding to clastic channel and braided channel, respectively. Braided branch waterway, underwater distributary channel, estuarine dam and front fan delta sedimentary microfacies environment; The probability accumulation curve of grain size appears in turn the wide and slow upper arch, low inclined multi-hop, one suspension, straight line, low oblique two segment, two jump, one suspension, three segment, low slope, three sections, typical two sections, and with the transition of fluid from debris flow to traction flow, The curve slope is gradually increasing. The results can be used as a reference for the study of sedimentary environment in the reservoir blocks dominated by coarse detritus.
【作者单位】：中国地质大学(北京)能源学院;中国石油新疆油田分公司勘探开发研究院;中国石油塔里木油田分公司;
【基金】：国家自然科学基金项目(41472091)
【分类号】：P618.13;P588.212

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