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| Sedimentary characteristics and lithofacies paleogeography evolution of Pero-carboniferous system in Jiyang depression |
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ZHANG Guan-long1,2,3,CHEN Shi-yue3,WANG Hai-fang4,ZHANG Peng-fei3
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(1. Department of Earth Sciences y Nanjing University，Nanjing 210093，China ;2. Wuxi Research Institute of Oil Geology, Exploration and Production Research Institute, S1N0PEC，Wuxi 214151, China ;3. College of Geo-Resources and Irrformation in China University of Petroleum, Dongying 257061, China;4. Geological Scientific Research Institute, Shengli Oilfield，SINOPEC, Dongying 257015, China)
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| Abstract: |
| By using sedimentology theories and outcrops, drilling, seismic and analytical and test data, sedimentary facies and lithofacies paleogeography of Pero-carboniferous system in Jiyang depression were studied. The results show that the sedimentary structure of the research area can be classified into four sedimentary systems including lagoon-platform sedimentary system, barrier land-lagoon-tidal flat sedimentary system, shallow delta sedimentary system, fluvial-lake sedimentary system and seven sedimentary facies including lagoon, plateaut hanier land，tidal flat, shallow delta, meandering river, shallow lake. Influenced by border orogenic belt of North China plate, the paleogeography evolved from epicontinental sea onshore environment，paralic environment to continental environment. |
| Key words: Jiyang depression Pero-carboniferous system sedimentary facies lithofacies paleogeography |
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