Application of Natural Gamma Ray Spectrometry in Analysis of Late Ordovician Carbonate Sequence Stratigraphic Analysis in
- 责任者：Yang Xiaofa (The School of Natural Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Lin Changsong
- 刊名：Oil Geophysical Prospecting
- 出版年：2010
- 卷期：45(3)
- 关键词：自然伽玛测井 ; gamma-ray logging ; 晚奥陶世 ; Upper Ordovician ; 层序地层学 ; sequence stratigraphy ; 塔里木盆地 ; Tarim Basin
- 页码：p.384-391
- 图表：5 illus., 1 table, 20 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
///Based on natural gamma spectral logging data and the principle of sequence stratigraphy, the sedimentary sequences in Late Ordovician, the system tract and the change trends for sea-level lifting and drop have been studied. The sediment record’s response relation indicates that the evolution of the Late Ordovician platform in Central Tarim Basin Uplift was a flooding event. The reef-bank complex is mainly located in the lower part of the transgressive system tract and in the upper part of the highstand system track, while the source rocks in the sequence framework shows a significant heterogeneity, mainly distributing in transgressive system tract. The high values of the Thorium and potassium in the moving average curve and high-values of the source rock’s total organic carbon amount show a good corresponding relationship, so the distribution location of the source rock in sequence framework can be quickly and completely identified.