岩性油气藏 ›› 2021, Vol. 33 ›› Issue (6): 70–80.doi: 10.12108/yxyqc.20210608

• 油气地质 • 上一篇    下一篇

涪陵地区下三叠统飞仙关组沉积相特征及有利储集体分布

任婕1, 胡忠贵1, 胡明毅1, 李雄2, 庞艳荣1, 左洺滔1, 黄宇飞1   

  1. 1. 长江大学 沉积盆地研究中心, 武汉 430100;
    2. 中国石化江汉油田分公司勘探开发研究院, 武汉 430223
  • 收稿日期:2021-02-19 修回日期:2021-05-07 出版日期:2021-12-01 发布日期:2021-11-25
  • 第一作者:任婕(1996-),女,长江大学在读硕士研究生,研究方向为储层沉积学。地址:(430100)湖北省武汉市蔡甸区蔡甸街大学路111号。Email:469149107@qq.com
  • 通信作者: 胡忠贵(1979-),男,博士,副教授,主要从事储层沉积学方面的教学和科研工作。Email:hzg@yangtzeu.edu.cn。
  • 基金资助:
    “十三五”国家科技重大专项“涪陵地区二、三叠系沉积相及层序地层研究”（2016ZX05007002）资助

Sedimentary facies characteristics and favorable reservoirs distribution of Lower Triassic Feixianguan Formation in Fuling area

REN Jie1, HU Zhonggui1, HU Mingyi1, LI Xiong2, PANG Yanrong1, ZUO Mingtao1, HUANG Yufei1   

  1. 1. Sedimentary Basin Research Center, Yangtze University, Wuhan 430100, China;
    2. Research Institute of Exploration and Development, Jianghan Oilfield Branch, Sinopec, Wuhan 430223, China
  • Received:2021-02-19 Revised:2021-05-07 Online:2021-12-01 Published:2021-11-25

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摘要： 近年来，四川盆地环开江—梁平海槽区的飞仙关组油气勘探获重大突破，具有良好的油气发现前景。为研究涪陵地区下三叠统飞仙关组沉积相特征及有利储集体分布，开展了岩心观察、地震解释、钻测井资料综合分析等研究工作，并在高频层序划分和沉积相标志识别的基础上，明确了飞仙关组沉积相特征。结果表明：①研究区飞仙关早期发育缓坡型台地、中—晚期发育镶边型台地；区域上四级层序格架内台缘带滩体具有进积型迁移规律，涪陵北部地区台缘滩体主要发育于sq3-HST时期，总体形成两期滩体组合，区内稳定分布。②研究区飞仙关组储层主要发育于涪陵北部的、以台缘滩相（鲕滩、生屑滩）沉积为主的储集体，储集岩为亮晶鲕粒灰岩、砂屑灰岩、残余颗粒白云岩及晶粒白云岩等。③涪陵北部兴隆1—兴隆2—兴隆3—福石1—福石2—拔向1井区域为有利储集体发育区。该研究成果可为涪陵地区下三叠统飞仙关组下一步勘探提供借鉴。

关键词: 沉积相, 生屑滩, 有利储集体, 飞仙关组, 下三叠统, 涪陵地区

Abstract: In recent years, major breakthroughs have been made in oil and gas exploration of Feixianguan Formation in Kaijiang-Liangping trough of Sichuan Basin, showing good prospects for oil and gas discovery. In order to study the sedimentary facies characteristics and the distribution of favorable reservoirs of Lower Triassic Feixianguan Formation, research work such as core observation, seismic interpretation, and comprehensive analysis of drilling and logging data were carried out. Based on high-frequency sequence division and identification of sedimentary facies markers, the sedimentary facies characteristics of Feixianguan Formation were clarified. The results show that: (1) Gentle slope platforms developed in the early stage of Feixianguan Formation, and fringed platforms developed in the middle to late stage in the study area; the platform margin beach bodies in the upper fourth-order sequence framework of the region have a progradation type migration pattern, the platform margin beach bodies in the northern part of Fuling area mainly developed during the sq3-HST period, forming a twostage combination of beach bodies and distributed stably in the region. (2) Reservoirs of Feixianguan Formation in the study area are mainly developed in northern Fuling area, with platform margin beach facies(oolitic beaches, bioclastic beaches) as the main reservoirs, and the reservoir rocks are sprite oolitic limestone, sandy limestone, residual grain dolomite and crystal grain dolomite. (3) The well areas of Xinglong 1, Xinglong 2, Xinglong 3, Fushi 1, Fushi 2 and Baxiang 1 in northern Fuling area are favorable for reservoir development. The research results can provide a reference for the next exploration of Lower Triassic Feixianguan Formation in Fuling area.

Key words: sedimentary facies, bioclastic beach, favorable reservoir, Feixianguan Formation, Lower Triassic, Fuling area

中图分类号: 

  • TE122.2
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