古地理学报 ›› 2020, Vol. 22 ›› Issue (2): 251-265. doi: 10.7605/gdlxb.2020.04.04

• 岩相古地理学及沉积学 • 上一篇    下一篇

四川盆地下寒武统龙王庙组颗粒滩沉积组合及其对储集层的控制作用

杨伟强1,2, 刘正1,2, 陈浩如3, 兰才俊1,2, 徐哲航1,2, 卢朝进1,2, 邹华耀1,2   

  1. 1 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;
    2 中国石油大学(北京)地球科学学院, 北京 102249;
    3 中国地质大学(武汉)资源学院, 湖北武汉 430074
  • 收稿日期:2019-04-30 修回日期:2019-10-11 出版日期:2020-04-01 发布日期:2020-03-30
  • 通讯作者: 邹华耀, 男, 1963年生, 中国石油大学(北京)教授, 主要从事油气运聚机理及富集规律研究。E-mail: huayaozou@cup.edu.cn
  • 作者简介:杨伟强, 男, 1993年生, 中国石油大学(北京)地球科学学院博士研究生, 从事沉积学与储集层地质学研究。E-mail: 871958241@qq.com
  • 基金资助:
    *国家自然科学基金项目(编号: U1663210)、中国科学院战略性先导科技专项编号(编号: XDA14010306)和中国石油化工股份有限公司项目(编号: P16108)联合资助

Depositional combination of carbonate grain banks of the Lower Cambrian Longwangmiao Formation in Sichuan Basin and its control on reservoirs

Yang Wei-Qiang1,2, Liu Zheng1,2, Chen Hao-Ru3, Lan Cai-Jun1,2, Xu Zhe-Hang1,2, Lu Chao-Jin1,2, Zou Hua-Yao1,2   

  1. 1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
    2 College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
    3 Faculty of Earth Resources, China University of Geosciences(Wuhan), Wuhan 430074, China
  • Received:2019-04-30 Revised:2019-10-11 Online:2020-04-01 Published:2020-03-30
  • Contact: Zou Hua-Yao, born in 1954, is a professor of China University of Petroleum(Beijing). He is mainly engaged in oil and gas migration and accumulation mechanism and enrichment law. E-mail: huayaozou@cup.edu.cn
  • About author:Yang Wei-Qiang, born in 1993, is a Ph.D. candidate in College of Geosciences, China University of Petroleum(Beijing). He is engaged in sedimentology and reservoir geology. E-mail: 871958241@qq.com
  • Supported by:
    Co-funded by the National Natural Science Foundation of China(No. U1663210), Chinese Academy of Sciences Strategic Priority Research Program(No. XDA14010306), and China Petroleum and Chemical Corporation Research Program(No. P16108)

摘要: 基于前人研究成果, 综合四川盆地龙王庙组野外露头、钻测井、岩心及薄片等资料, 对龙王庙组的岩石类型、沉积亚相和岩石物性进行了详细的分析, 探讨了龙王庙组颗粒滩沉积组合的特征、分布规律及其对储集层发育的控制作用。结果表明: (1)四川盆地龙王庙组可以识别出4种主要的岩石类型, 垂向上主要发育3种与颗粒滩相关的水体向上变浅的沉积组合: 多期颗粒滩垂向叠置、颗粒滩—台坪(混积潮坪)、滩间海—颗粒滩(—台坪);(2)颗粒滩沉积组合分布受控于古地貌和海平面升降;平面分布主要受控于古地貌, 多期颗粒滩垂向叠置组合主要发育在川中地区, 颗粒滩—台坪(混积潮坪)组合主要发育在川北、川西南地区, 滩间海—颗粒滩(—台坪)组合主要发育在川东、川东南地区;垂向分布主要受控于海平面升降, 与所处层序地层的位置有密切关系, 滩间海—颗粒滩组合多发育于层序中下部, 颗粒滩—台坪(混积潮坪), 多期颗粒滩垂向叠置组合发育于层序中上部;(3)多期颗粒滩垂向叠置组合最有利于储集层发育, 其次是颗粒滩—台坪(混积潮坪)组合, 滩间海—颗粒滩(—台坪)组合储集层物性较差。

关键词: 四川盆地, 寒武系, 龙王庙组, 颗粒滩, 沉积组合

Abstract: Rock types, sedimentary subfacies and grain bank properties of the Longwangmiao Formation are studied in detail by outcrop, drilling and logging data, core, thin section and physical property of the Longwangmiao Formation in the Sichuan Basin. The characteristics, development and distribution of grain bank depositional combinations of the Longwangmiao Formation in Sichuan Basin and their control on reservoir development are discussed. The results show that: (1)four main rock types can be identified in the Longwangmiao Formation in Sichuan Basin. Vertically, three upward shallowing depositional combinations associated with carbonate grain bank can be identified: multi-stage vertical overlapping of grain banks, grain bank-tidal flat(mixed tidal flat), interbank-grain bank(-tidal flat); (2)the distribution of depositional combinations of grain banks is controlled by paleogeomorphy and sea level fluctuation;and the horizontal distribution is mainly controlled by paleogeomorphy, the vertical overlapping of multi-stage grain banks is mainly developed in the central Sichuan Basin, grain bank-tidal flat(mixed tidal flat)mainly develop in northern and southwestern Sichuan Basin, and interbank-grain bank(-tidal flat)mainly develop in the eastern and southeastern Sichuan Basin;vertically, they are mainly controlled by sea level changes, and have close relationship with their locations in the sequence stratigraphy, and interbank-grain bank(-tidal flat)mostly develop in the middle and lower parts of the sequence, multi-stage vertical overlapping of grain banks and grain bank-tidal flat(mixed tidal flat)develop in the upper part of the sequence; (3)multi-stage vertical overlapping of grain banks is the most favorable for reservoir development, followed by grain bank-tidal flat(mixed tidal flat)combination, and interbank-grain bank(-tidal flat)combination has the poor reservoir physical properties.

Key words: Sichuan Basin, Cambrian, Longwangmiao Formation, grain bank, depositional combination

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