西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (5): 13-24.DOI: 10.11885/j.issn.1674-5086.2019.03.04.03

• 地质勘探 • 上一篇    下一篇

四川盆地中二叠统栖霞组沉积相展布及勘探意义

白晓亮1,2, 杨跃明1, 文龙1, 罗冰1, 洪海涛1   

  1. 1. 中国石油西南油气田分公司勘探开发研究院, 四川 成都 610051;
    2. 西南石油大学地球科学与技术学院, 四川 成都 610500
  • 收稿日期:2019-03-04 出版日期:2020-10-10 发布日期:2020-10-10
  • 通讯作者: 白晓亮,E-mail:bxl7336@163.com
  • 作者简介:白晓亮,1985年生,男,汉族,陕西岐山人,博士,主要从事油气地质综合研究及勘探部署方面的工作。E-mail:bxl7336@163.com;杨跃明,1963年生,男,汉族,江西瑞金人,教授级高级工程师,博士,主要从事油气勘探开发研究和管理工作。E-mail:yangym@petrochina.com.cn;文龙,1977年生,男,汉族,四川威远人,高级工程师,硕士,主要从事油气地质综合研究及勘探部署方面的工作。E-mail:wenlong@petrochina.com.cn;罗冰,1982年生,男,汉族,河南漯河人,高级工程师,博士,主要从事油气地质综合研究及勘探部署方面的工作。E-mail:lb-2011@petrochina.com.cn;洪海涛,1971年生,男,汉族,湖北枣阳人,高级工程师,主要从事天然气地质勘探综合研究方面的工作。E-mail:xfhht@petrochina.com.cn
  • 基金资助:
    国家科技重大专项(2016ZX05007-004)

Sedimentary Facies Distribution and Exploration Significance of the Middle Permian Qixia Formation in the Sichuan Basin

BAI Xiaoliang1,2, YANG Yueming1, WEN Long1, LUO Bing1, HONG Haitao1   

  1. 1. Research Institute of Petroleum Exploration and Development, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, China;
    2. School of Geosciences and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2019-03-04 Online:2020-10-10 Published:2020-10-10

摘要: 通过对四川盆地中二叠统栖霞组盆缘野外剖面、岩芯详细观察,结合地震、测井等资料研究分析,建立标准岩性、古生物地层剖面,识别相标志,将沉积相划分为开阔台地相、台地边缘相、斜坡相及盆地相,在平武-茂汶-小金一带识别斜坡相和盆地相,川西地区发育台地边缘滩相带,川西-川中隆起带为开阔台地相台内滩亚相发育带;川北-蜀南低隆带为开阔台地相开阔海和台内滩亚相;川东地区为开阔台地相台内浅洼亚相。区域地层对比及沉积相展布表明,二叠系沉积前古地貌控制栖霞组沉积格局,加里东古隆起地貌及川西裂陷盆地发育共同控制川西地区栖霞组台地边缘相展布。栖霞组台缘相带发育规模相控白云岩储层,与下寒武统优质烃源层形成良好源储匹配关系,栖霞组台缘相带是深层海相碳酸盐岩重点勘探领域,泥盆系-二叠系具有相同源储匹配关系,具备发育大型构造岩性圈闭气藏的地质条件,推覆体下盘发育大型隐伏构造高带,是整体勘探、立体勘探重要有利区带。

关键词: 四川盆地, 中二叠统, 栖霞组, 沉积相, 加里东古隆起, 川西裂陷盆地, 台地边缘

Abstract: Through analysis of the seismic and logging data, we established standard lithology and Paleozoic stratigraphic profiles, and identified facies markers. Sedimentary facies were divided into the open platform facies, platform margin facies, slope facies, and basin facies. The slope facies and the basin facies were identified in the Pingwu-Maowen-Xiaojin area. A zone of platform margin facies had developed in the Western Sichuan Area. The Western Sichuan-Central Sichuan uplift is a developmental belt of the intra-platform beach subfacies of the open platform facies. The Northern Sichuan-Southern Shu low uplift is the open-sea and intra-platform beach subfacies of the open platform facies. The Eastern-Sichuan area is the intra-platform shallow-swamp subfacies of the open platform facies. Regional stratigraphic correlation and the distribution of sedimentary facies indicate that the pre-Permian sedimentary paleo-geomorphology controlled the sedimentary pattern of the Qixia Formation, while the development of the Caledonian uplift and the Western Sichuan rift Basin jointly controlled the distribution of the platform margin facies of the Qixia Formation in Western Sichuan. The platform margin facies belt of the Qixia Formation developed a facies-controlled dolomite reservoir, which formed a good source-storage match with the lower Cambrian high-quality hydrocarbon source layer. The platform margin facies belt of the Qixia Formation is a key exploration area for deep marine carbonate rocks. The Devonian-Permian has the same source-storage matching relationship, providing geological conditions for the development of large-scale tectonic-lithologic trap gas reservoirs. The large-scale concealed structural highs developed in the lower part of the nappe, which is an important zone favorable for overall exploration and three-dimensional exploration.

Key words: Sichuan Basin, Middle Permian, Qixia Formation, sedimentary facies, Caledonian uplift, Western Sichuan rift basin, platform margin

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