期刊文献+

川东地区长兴组台地内生物礁沉积特征研究 被引量:4

Study on sedimentary characteristics of bioherm in Changxing formation in eastern Sichuan
下载PDF
导出
摘要 通过野外露头、岩心、录井资料,对川东地区台地内生物礁的沉积特征进行了研究,结果表明:台地内部发育台内点礁和丘礁,区内点礁以涧水沟和老龙洞生物礁最具特色,造礁生物组合特征也十分一致,其沉积相分布对称。在纵向上表现出两个颗粒岩-障积岩-骨架岩组成的沉积旋回;主要发育泥晶海绵礁灰岩,礁体多由障积岩组成;造礁生物以囊状海绵、串珠状海绵为主,造礁生物间充填灰泥和少量生屑;可划分出礁基、礁核、礁坪诸亚相;礁体的发育规模小,大多数发育于长二中期。 In recent years,the prospecting research of bioherm is expeditious but the systematic study on bioherm in the platform is less in the eastern Sichuan basin.The sedimentary characteristics of the bioherm in the platform have been studied based on the outcrop,drilling core and logging data.The result shows that point reef and hill reef are well developed inside the platform.The point reefs such as Jianshuigou and Laolongdong is the unique feature.The reef building organism combined characteristic is consistent and its sedimentary facies distribution are symmetric.There are two cycles of sedimentation made up of the vertical rock-bafflestone-skeleton rock on the vertical.The mainly rock is micritic sponge reef limestone.Reefs proper are made up of bafflestone.The main reef-building organism is saccate spongia and moniliform spongia and their visceral foramen were filled by lime mud and a little biogenicdebris.The reef sedimentary facies can be divided into three subfacies-the reef base subfacies,reef core subfacies and reef flat subfacies.The reef mainy developed in the Changxing medium-term and its size is small.Through the study of sedimentary characteristics of eastern Sichuan reefs,and it can provide more reliable geological basis for the reef gas exploration and development.
出处 《石油地质与工程》 CAS 2013年第3期35-39,146-147,共5页 Petroleum Geology and Engineering
基金 国家自然科学基金青年基金项目"基于随钻监测的欠平衡钻井储层评价理论研究"(511041224) 教育部博士点基金项目"碳酸盐岩单裂缝空间定量与钻井动态变形机理研究"(20125121110001)资助
关键词 川东地区 生物礁 点礁 海绵 造礁生物 沉积相 eastern Sichuan bioherm point reef spongia reef-building organism sedimentary facies
  • 相关文献

参考文献17

二级参考文献95

共引文献299

同被引文献64

引证文献4

二级引证文献10

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部