Distribution and Genesis of Large-Scale Upper Palaeozoic Lithologic Gas Reservoirs on Yi-Shaan Slope, Ordos Basin

详细信息   

• 责任者：Fu Jinhua （Research Institute of Exploration and Development ; PetroChina ; Changqing Oilfield Company ; Xi’an 710021 ; China） ; Wei Xinshan
• 刊名：Petroleum Exploration and Development
• 出版年：2008
• 卷期：35(6)
• 关键词：油气勘探 ; petroleum exploration ; 岩性圈闭 ; lithologic traps ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.664-667，691
• 图表：3 illus., 1 table, 25 refs.
• 分类号：1003
• issnNo：ISSN1000-0747
• isbnNo：CN11-2360/TE

摘要

Lithologic reservoirs are widely distributed at Upper Paleozoic of Yi-Shaan Slope in Ordos Basin. With over 40 years of exploration, six large gas fields were discovered, including Sulige, Wushenqi, Yulin, Daniudi, Zizhou and Mizhi, with total proved gas in place up to 13 126.54×10⁸ m³. Based on the study on reservoir formation, the key factors of large-scale lithologic reservoirs include: widely-distributed coal measure source rocks and widely-covered hydrocarbon generation, laying a physical foundation for wide gas accumulation; wide development of fluvial-delta sand deposits in the north of the basin, providing good reservoir spaces for wide gas accumulation; reservoir formation after densification of Upper Paleozoic reservoirs and stable structures in the basin ensure the later conservation of gas reservoirs. The effective allocation and interaction of these factors in space and time lead to the large-scale distribution of Upper Palaeozoic lithologic gas reservoirs.