|
|||||
|
|
| Characteristics of petroleum accumulation in syncline of the Songliao basin and discussion on its accumulation mechanism | |
| 作者姓名： | WU HeYong LIANG XiaoDong XIANG CaiFu & WANG YueWen Daqing Oil Field Exploration and Development Research Institute Daqing China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China Basin & Reservoir Research Center of China University of Petroleum Beijing China |
| 作者单位： | WU HeYong1，2，LIANG XiaoDong1，XIANG CaiFu3 & WANG YueWen1 1 Daqing Oil Field Exploration and Development Research Institute，Daqing 163712，China; 2 Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China; 3 Basin & Reservoir Research Center of China University of Petroleum，Beijing 102249，China |
| 摘 要： | The relation between oil and water in reservoirs with low and ultra-low permeability is very complicated. Gravitational separation of oil and water is not obvious. Normal reservoirs are located in depression and structural high spot, oil and water transitions are located in their middle. Stagnation is the key fact of oil-forming reservoir in the axis of a syncline based on the research of oil, gas and water migration manner, dynamics and non-Darcy flow in the Songliao basin. In low and ultra-low permeable reservoir, gas and water migrate easily through pore throats because their molecules are generally smaller than the pore throats; but the minimum diameter of oil droplets is larger than pore throats and they must be deformed to go through. Thus, gas and water migrate in advance of oil, and oil droplets remain behind. Pressure differential and the buoyancy force in a syncline reservoir are a main fluid driving force; and capillary force is the main resistance to flow. When the dynamics force is less than resistance, oil is immobile. When the buoyancy force is less than the capillary force, a gravitational separation of oil and water does not occur. The reservoir in the mature source rock of a syncline area with the low and ul- tra-low permeability belongs to an unconventional petroleum reservoir. |
| 收稿时间： | 26 June 2006 |
| 修稿时间： | 6 December 2006 |
Characteristics of petroleum accumulation in syncline of the Songliao basin and discussion on its accumulation mechanism |
|
| WU HeYong,,LIANG XiaoDong,XIANG CaiFu & WANG YueWen Daqing Oil Field Exploration and Development Research Institute,Daqing ,China, Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing ,China, Basin & Reservoir Research Center of China University of Petroleum,Beijing ,China.Characteristics of petroleum accumulation in syncline of the Songliao basin and discussion on its accumulation mechanism[J].Science in China(Earth Sciences),2007,50(5):702-709. | |
| Authors: | Wu HeYong Liang XiaoDong Xiang CaiFu Wang YueWen |
| Institution: | 1. Daqing Oil Field Exploration and Development Research Institute, Daqing 163712, China;Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Daqing Oil Field Exploration and Development Research Institute, Daqing 163712, China 3. Basin & Reservoir Research Center of China University of Petroleum, Beijing 102249, China |
| Abstract: | The relation between oil and water in reservoirs with low and ultra-low permeability is very complicated. Gravitational separation of oil and water is not obvious. Normal reservoirs are located in depression and structural high spot, oil and water transitions are located in their middle. Stagnation is the key fact of oil-forming reservoir in the axis of a syncline based on the research of oil, gas and water migration manner, dynamics and non-Darcy flow in the Songliao basin. In low and ultra-low permeable reservoir, gas and water migrate easily through pore throats because their molecules are generally smaller than the pore throats; but the minimum diameter of oil droplets is larger than pore throats and they must be deformed to go through. Thus, gas and water migrate in advance of oil, and oil droplets remain behind. Pressure differential and the buoyancy force in a syncline reservoir are a main fluid driving force; and capillary force is the main resistance to flow. When the dynamics force is less than resistance, oil is immobile. When the buoyancy force is less than the capillary force, a gravitational separation of oil and water does not occur. The reservoir in the mature source rock of a syncline area with the low and ul- tra-low permeability belongs to an unconventional petroleum reservoir. |
| Keywords: | oil droplet pore throat syncline oil reservoir low to ultra-low permeable reservoir stagnation non-Darcy flow |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ | |