文档介绍：成都理工大学硕士学位论文
Analysis of High-Resolution Sequence Stratigraphy of Shallow-water deltas in Interval 8 of Yanchang Formation, Jiyuan area of Ordos Basin
Introduction of the author:Liaoyi, male, was born in June, 1985 whose tutor was Professor Zheng Rongcai . He graduated from Chengdu University of Technology in Geology (sedimentlogy) major and was granted the Master Degree in June, 2010.
Abstract
Jiyuan area is located in the southwest of Ordos Basin. Interval 8 of Yanchang Formation of the Upper Triassic is target stratum of exploration activity. Recently, gas/oil has been drilled in the layer in study area, But they are mainly low-yielding wells, it is mainly related with sandstone thickness varies greatly, spatial distribution and strong heterogeneity, and low permeability sandstones reservoirs which are low oil saturation Interval 8 of Yanchang Formation. Therefore, Provenance analysis and sedimentary facies of Interval 8 of Yanchang Formation are studied. The research has acquired following results:
Based on the core observation, analysis of logging and debris and minerals data, bined with the fruit of predecessors this paper points out for the first time that the Interval 8 of Yanchang Formation in Jiyuan area in Ordos Basin developed shallow water delta.
Provenance analysis through heavy mineral and sedimentology Etc, the sedimentation in the study area was controlled by the northeast, northwest and southwest sources, and the three material properties of the source rock area are identified. The extension direction of the three main source area of the Interval 8 of Yanchang Formation is also the extension direction of the reservoir, and it controls the development size of the sand body.
With the theory of high-resolution sequence stratigraphy, the base-level cycles in chang-8 oil set of Yanchang formation in Jiyuan area of Ordos Basin are recognized as 2 middle-term cyclic sequences(MSC1 and MSC2) and 6 short-term cyclic sequences(ssc1-ssc6). Distribution