川中磨溪—高石梯地区下寒武统龙王庙组层序格架内滩体的发育演化特征及对储层的控制

作    者：王 頔1,2，胡明毅1,2，高 达1,2，邢梦妍1,2，汪 涛1,2，刘泠杉1,2，王静怡1,2
单    位：（1 长江大学油气资源与勘探技术教育部重点实验室； 2 长江大学地球科学学院）
基金项目：受国家自然科学基金“碳酸盐岩台缘礁滩储层精细地质建模研究”等资助
摘    要：
川中磨溪—高石梯地区龙王庙组可划分为两个三级层序。通过大量岩心、薄片以及测井资料综合分析，磨溪—高石梯地区龙王庙期整体属于局限台地沉积，可划分为台内滩、滩间洼地以及潟湖亚相。以台内滩颗粒含量、沉积构造以及单层滩体沉积厚度为基础，结合测井响应特征分析，将台内滩划分为滩核、滩翼以及白云岩坪等微相，并建立了台内滩的3种典型沉积序列：滩翼—滩核—白云岩坪、潟湖—滩间洼地—台内滩，以及滩间洼地—台内滩。层序格架内台内滩的纵横向发育特征表明：SQ2时期较SQ1时期更为发育，滩体单层厚度和总厚度均较大，层序界面附近的滩核—白云岩坪沉积序列上部为最有利的储层发育相带。
关键词：四川盆地；寒武纪；龙王庙组；三级层序；台内滩；沉积序列；储层

Development and Evolution of Inner-Platform Shoal with Control on the Reservoir in a Sequence Framework of Lower Cambrian Longwangmiao Formation, Moxi-Gaoshiti Area, Central Sichuan Basin

Author's Name: Wang Di, Hu Mingyi, Gao Da, Xing Mengyan, Wang Tao, Liu Lingshan, Wang Jingyi
Institution: Geoscience College of Yangtze University
Abstract:
Lower Cambrian Longwangmiao Fm. can be divided into two third-order sequences in Moxi-Gaoshiti area, central Sichuan Basin. According to the cores, thin-sections and logging data, it is indicated that the restricted platform during Longwangmiao period in Moxi-Gaoshiti area can be divided into inner-platform shoal, intershoal and lagoon. Based on the grain content, sedimentary structure, thickness of a single shoal as well as interpretation of well-logging, the inner-platform shoal is divided into shoal body, shoal flank and dolomitic flat. Three typical sedimental sequences are setup, all with a shallowing-upward succession. On the characteristics of spatial development in sequence framework, the inner-platform shoal developed more widely in SQ2 than in SQ1, with larger thickness of a single shoal and the total thickness of shoals. The most favorable reservoir developed at the upper part of succession of shoal body-dolomitic flat near the sequence boundary.
Keywords: Cambrian; Longwangmiao Fm.; Third-order sequence; Inner-platform shoal; Sedimentary sequence; Reservoir; Sichuan Basin
投稿时间： 2016-03-02  
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