王琼, 许浩, 汤达祯, 陶树. 基于地球化学的页岩层序地层划分——以浙江煤山地区长页1井上二叠统龙潭组页岩为例[J]. 煤田地质与勘探, 2017, 45(5): 13-18. DOI: 10.3969/j.issn.1001-1986.2017.05.003
引用本文: 王琼, 许浩, 汤达祯, 陶树. 基于地球化学的页岩层序地层划分——以浙江煤山地区长页1井上二叠统龙潭组页岩为例[J]. 煤田地质与勘探, 2017, 45(5): 13-18. DOI: 10.3969/j.issn.1001-1986.2017.05.003
shu
WANG Qiong, XU Hao, TANG Dazhen, TAO Shu. Geochemistry-based sequential stratigraphic classification of shale——With shale of Upper Permian Longtan Formation in well Changye1 in Meishan area of Zhejiang as example[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(5): 13-18. DOI: 10.3969/j.issn.1001-1986.2017.05.003
Citation: WANG Qiong, XU Hao, TANG Dazhen, TAO Shu. Geochemistry-based sequential stratigraphic classification of shale——With shale of Upper Permian Longtan Formation in well Changye1 in Meishan area of Zhejiang as example[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(5): 13-18. DOI: 10.3969/j.issn.1001-1986.2017.05.003
shu

基于地球化学的页岩层序地层划分——以浙江煤山地区长页1井上二叠统龙潭组页岩为例

Geochemistry-based sequential stratigraphic classification of shale——With shale of Upper Permian Longtan Formation in well Changye1 in Meishan area of Zhejiang as example

    摘要
  • 摘要: 为了更准确地划分地层层序，将有机地球化学和层序地层学方法进行了有机结合。将浙江煤山地区长页1井龙潭组页岩总有机碳含量（TOC）、碳优势指数（CPI）、奇偶优势指数（OEP）、氯仿沥青“A”含量、轻正构烷烃与重正构烷烃比（（nC21+nC22）/（nC28+nC29））以及姥植比（Pr/Ph）等有机地球化学指标与传统的层序划分方式（测井曲线、岩性等）相结合，指出了现今长页1井龙潭组的层序划分所存在的问题，并进行了修正完善。研究表明，TOC、氯仿沥青“A”以及姥植比等指标对层序的划分具有重要指示作用，龙一段、龙二段、龙三段最大海泛面均位于本段TOC极大值位置。龙一段最大海泛面处TOC质量分数为2.46%，龙二段为1.57%，龙三段为4.84%。基于此结果对长页1井的最大海泛面的划分进行了调整。

     

    Abstract: In order to divide stratigraphic sequence more accurately, the organic geochemistry was combined with sequence stratigraphy. The authors combined the organic geochemistry indicators such as TOC, CPI, OEP, chloroform bitumen“A”, (nC21+nC22)/(nC28+nC29) and Pr/Ph and so on with traditional sequence segmentation approach(well log, lithological characters, etc.) of the shale of Longtan Formation of well Changye1 in Meishan area, pointed out that the current issue of sequence classification of well Changye 1, and amended it. The results show that TOC, chloroform bitumen“A”, Pr/Ph and any other indexes play an important role in dividing the sequence, the maximum flooding surface of Member Long1, Member Long2 and Member Long3 all corresponded with the maximum TOC of these members. The TOC of the maximum flooding surface of members Long1, Long2 and Long3 is 2.46%, 1.57%, and 4.84% respectively. The maximum flooding surface of well Changye1 has been adjusted based on this conclusion.

     

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