首页 | 本学科首页   官方微博 | 高级检索  
     检索      

资阳地区震旦系古岩溶作用及其特征讨论
引用本文:向芳,陈洪德,张锦泉.资阳地区震旦系古岩溶作用及其特征讨论[J].沉积学报,2001,19(3):421-424.
作者姓名:向芳  陈洪德  张锦泉
作者单位:成都理工学院沉积地质研究所,成都 610059
摘    要:在资阳地区震旦系灯影组的白云岩地层中发现了四川盆地又一含气区块,通过对地层资料、露头特征及构造史的分析研究,证实该储层为古岩溶作用的产物,在此基础上对古岩溶的分带性、旋回性及岩溶地貌特征进行了讨论,从而为储层特征研究及勘探预测奠定了基础。

关 键 词:资阳地区    灯影组    古岩溶作用    岩溶特征
文章编号:1000-0550(2001)03-0421-04
收稿时间:2000-07-18
修稿时间:2000年7月18日

Paleokarst and Its Characteristics of Dengying Formation in Ziyang Area
XIANG Fang,CHENG Hong de,ZHANG Jing quan.Paleokarst and Its Characteristics of Dengying Formation in Ziyang Area[J].Acta Sedimentologica Sinica,2001,19(3):421-424.
Authors:XIANG Fang  CHENG Hong de  ZHANG Jing quan
Institution:Institute of Sedim entary Geology, Chengdu University of Technology, Chengdu 610059
Abstract:In Ziyang area, another gas bearing block in Sichuan Basin has been found in Sinian Dengying Formation. Dengying Formation is a set of carbonate sediments, which includes algal granula dolostone, algal cementation dolostone, micrite dolostone and crystal powder cryptomere dolostone. To the origin of the gas bearing block, there are some different explanations: 1) the result of weathering, meteoric water leaching and later tectonic process; 2) formed by recrystallization and later burial dissolution; 3) generated by dolomitization and dissolution; 4) main control factor being paleokarst. According to the study of seven drills, regional exposure characteristic and tectonic evolution history, it can be concluded that paleokarst existed in Dengying Formation in this area and it took place during Tongwan Movement at the end of Sinian. Paleokarst profile can be divided into three zones: surface, vadose and phreatic dissolution zones. In the vadose and phreatic dissolution zones, four karst forms can be found : dissolved fissure, spelaeum, dissolved hollow and cave. In this area, two karst cycles can be identified in Dengying Formation. The layer which formed by superposition of phreatic dissolution zone in first cycle and vadose zone in second cycle is the position where karst is the most developed, and the maximum vugular pore space is 42.5%. According to study, it can be found that Cambrian silicon phosphorus sediments have the characteristics of compensation sedimentation, which lie on the relic Dengsan and Dengsi section. On the basis of thickness of silicon phosphorus sediments, the paleokarst topography can be reconstructed,i.e: in south west, it is mosor high land; in north east, it is mosor bottom; between them there is a mosor slope. All topography shows from higher in south west to lower in north east. All of these provide the necessary information for the research on reservoir characteristics and forecast prospecting targets.
Keywords:Ziyang area  Dengying Formation  paleokarst  karst characteristics
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《沉积学报》浏览原始摘要信息
点击此处可从《沉积学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号