剖2井延长组孢粉化石再研究及其意义  

Re-Study of Sporopollen Fossil of Well Pou-2 Yanchang Formation and Its Significance

作　　者：解古巍[1] 袁效奇[1] 贺静[1] 冯胜斌[1] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院

出　　处：《低渗透油气田》2008年第3期48-53,共6页

摘　　要：前人对鄂尔多斯盆地三叠系延长组孢粉化石的研究主要集中在系统分类学和以5个地层段为基础建立孢粉组合的研究上。本次研究则以延长组的10个油层组为单位，研究了剖2井各油层组的孢粉组合，讨论分析了各油层组的孢粉组合面貌和特征，并建立了7个孢粉／孢粉组合带。统计分析还发现，剖2井各油层组中蕨类植物孢子和裸子植物花粉含量存在阶段性变化，可能与气候环境、沉积环境、物源及水体深度有一定关系。建立的孢粉／孢粉组合带可以为生产实践工作提供更详尽的地层对比参考，是建立更高分辨率地层的孢粉对比的一次尝试。The predecessors＇ researches on sporopollen fossil of the Triassic Yanchang Fonnation of the Ordos basin focused on the system taxology and the establishment of sporopollen assemblage based on the 5 strata segments. The authors take 10 oil reservoir groups as a unit to study the sporopollen assemblage of every oil reservoir group of the well Pou2, discuss and analyze the features and characteristics of the sporopollen assemblage of each oil reservoir group, and establish 7 sporopollen / palynofloras assemblage zones. The authors find through statistical analysis that there are stage changes in the contents of fern spores and gymnosperms pollen in each oil reservoir group of the well Pou2. They may be related to climatic environment, sedimentary environment, hydrocarbon sources, as well as the water depth, to a certain extent. The established sporopollen / palynofloras assemblage zones can provide a more detailed stratigraphic con＇elation parameters for the production practice, being an attempt to build a sporopollen contrast of higher-resolution fonnation.

关 键 词：鄂尔多斯盆地 三叠系 延长组 油层组 孢粉/孢粉组合带 

分 类 号：TE121[石油与天然气工程—油气勘探]