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SEDIMENTARY MICROFACIES OF Ed3 IN DAWANGZHUANG AREA OF RAOYANG SAG |
ZHANG Qiang1, GUO Fa-jun2, XIE Jun1, ZHANG Shu-juan2, CHEN Xiao-qin2, HAO Peng3, XU Min2 |
1. School of Earth Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong Province, China; 2. Exploration and Development Institute of Huabei Oilfield Branch, PetroChina, Renqiu 062552, Hebei Province, China; 3. Geological Institute of Erenhot Branch, Huabei Oilfield Company, Xilinhot 026000, Inner Mongolia, China |
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Abstract To solve the problem of inconsistencies in the determination of sedimentary facies types in Dawangzhuang area, on the basis of regional tectonic evolution, with drilling data, sedimentary structure marks and logging data, this paper discusses the controlling of surrounding buried hills and subsags on the source direction and sedimentary facies types during the sedimentary period of the third member of Dongying Formation (Ed3), and establishes the sedimentary model of Ed3. The results show that the subsidence center is located in the northeast of study area during the sedimentary period of Ed3, which mainly receives the provenance deposits of Shenze low salient in the southwest. During the sedimentation of Dongying Formation, with the uplifting of fault depression, the lake basin shrinks rapidly, the terrain becomes flat gradually, the sedimentary facies continues to extend, and the meandering river facies is developed in the Ed3 of Dawangzhuang area. The detailed study of sedimentary facies provides a basis for reservoir prediction.
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Received: 06 December 2019
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