Hydrocarbon Migration and Accumulation of Lower Ordovician in North Slope of Tazhong Low-Swell
详细信息
- 责任者：Xu Zhiming (College of Resources and Environment ; Southwest Petroleum University ; Chengdu 610500 ; China) ; Zhang Haizu
- 刊名：Xinjiang Petroleum Geology
- 出版年：2011
- 卷期：32(3)
- 关键词：油气运移 ; oil and gas migration ; 油气聚集 ; oil and gas accumulation ; 塔里木盆地 ; Tarim Basin
- 页码：p.277-280
- 图表：2 illus., 2 refs.
- 分类号：1003
- issnNo：ISSN1001-3873
- isbnNo：CN65-1107/TE
摘要
The Lower Ordovician weathering crust in north slope of Tazhong low-swell is an important channel for petroleum migration and reservoir together with underlying Cambrian as a cap rock. Following the muddy limestone deposit of Lianglitag Formation of the Upper Ordovician, the hydrocarbon generated in the Middle-Late Ordovician as peak stage for oil generation in the Cambrian shale source rocks in Manjiaer sag of northern Tazhong area could be trapped effectively. The Lower Ordovician weathered crust reservoirs linking to the underlying Cambrian reservoir-cap combination by faults and fractures is important gas migration layer during the Himalayan. In the places of suitable sealing conditions, it is believed that natural gas accumulation in continuous distribution could be formed.