川东南五峰组-龙马溪组黑色页岩热液活动证据及意义  

Evidence of Hydrothermal Activity and Its Significance in the Black Shale of Wufeng Formation-Longmaxi Formation,Southeastern Sichuan Basin

作　　者：朱逸青 石学文[1] 杨雪[1] 吴伟[1] 杨雨然 刘佳[1] 李怡 许幻 冉波[2] ZHU Yi-qing;SHI Xue-wen;YANG Xue;WU Wei;YANG Yu-ran;LIU Jia;LI Yi;XU Huan;RAN Bo(PetroChina Southwest Oil and Gas Field Company,Chengdu 610051,China;School of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国石油西南油气田公司,成都610051 [2]成都理工大学地球科学学院,成都610059

出　　处：《科学技术与工程》2025年第10期4067-4077,共11页Science Technology and Engineering

基　　金：国家自然科学基金(42072129)。

摘　　要：热液流体活动对盆地中流体与岩石相互作用、烃类形成具有重要影响。为此,运用大视域拼接扫描电镜、矿物定量分析、X射线衍射、同位素、电子探针等技术手段,阐明了川东南五峰组-龙马溪组黑色页岩热液活动的矿物学和地球化学特征。研究结果表明:以钡冰长石、方解石、磷灰石、重晶石为主的非金属矿物和以闪锌矿、黄铁矿、方铅矿、黄铜矿为主的金属矿物组合具有典型的热液活动特征;重晶石原位锶同位素比值在0.71976~0.72394,平均值为0.72237;碳酸盐矿物含量异常高,最高达60%。结合前人研究构建了川东南地区五峰组-龙马溪组热液流体活动的矿物学和地球化学识别标志,认为热液流体活动对储集空间具破坏性。The influence of hydrothermal fluids on fluid-rock interactions and hydrocarbon generation in basins is of great significance.The mineralogical and geochemical characteristics of hydrothermal activity in the black shale of the Wufeng Formation-Longmaxi Formation in southeastern Sichuan was investigated using advanced techniques such as large field splicing scanning electron microscopy,mineral quantitative analysis,X-ray diffraction,isotopes,and electron probes.The results show that non-metallic minerals such as barium ice feldspar,calcite,apatite,and barite,as well as metal minerals like sphalerite,pyrite,galena,and chalcopyrite,exhibit distinct characteristics of hydrothermal activity.The in-situ Sr isotope ratio of barite ranges from 0.71976 to 0.72394,with an average of 0.72237.The carbonate mineral content is exceptionally high,up to 60%.Based on previous research,mineralogical and geochemical indicators for hydrothermal fluid activity in the Wufeng Formation-Longmaxi Formation of southeastern Sichuan were established,suggesting that hydrothermal fluids have detrimental effects on reservoir space.

关 键 词：热液流体 黑色页岩 五峰组-龙马溪组 川东南地区 

分 类 号：TE122.2[石油与天然气工程—油气勘探]