摘要
由于工程条件及施工费用等因素，最准确求取油藏原始含油饱和度的油基泥浆或密闭取心方法不能普遍使用，一般采用压汞毛细管压力曲线方法间接确定，而最小含油喉道半径是间接计算原始含油饱和度的关键参数。所以，确定砂岩油藏的储层最小喉道半径对于间接计算油藏原始含油饱和度、认识油藏的油水分布及评价油藏和研究成藏动力等都有着非常重要意义。采用实际密闭取心样品分析的原始含油饱和度资料，反求最小含油喉道半径的方法，其可靠性、实用性要好于其他方法。指出了过去用毛管压力曲线间接求取油层原始含油饱和度的3种常用方法存在的不足。计算了松辽盆地北部扶杨油层最小含油喉道半径主要在0．11～0．21μm。激光共聚焦扫描显微镜下对储层孔隙中原油形态观察，提供了最小含油喉道的直接证据，最后利用最小含油喉道半径研究了成藏动力。
Due to engineering conditions, operation cost factor and so on, the most accurate obtaining method of initial oil saturation by oil-base mud or sealed coring is not generally used. Instead of the above, the method of capillary pressure curve by mercury injection is commonly adopted indirectly and moreover the smallest oil-bearing throat radius is the key factor in the above calculation. Therefore, the radius determination for sandstone oil reservoirs possesses very important significance for the indirect calculation of the above oil saturation, oil and water distribution, oil reservoir evaluation, reservoir forming dynamics and so on. With the help of the analyzed initial oil saturation data of actual sealed core samples, the smallest oil-bearing throat radius can be reversely calculated and furthermore the method is more reliable and practical than the others. In detail, the commonly used three calculating methods of initial oil saturation by capillary pressure curve are presented. The smallest oil-bearing throat radius in Fuyang oil reservoirs of North Songliao Basin is calculated （mainly within 0. 11-0.21 μm）. The observation of the crude oil morphology in reservoir pores under Laser Co-focal Scanning Microscope offers the direct proof of the smallest oil-bearing throat. Finally, the reservoir forming dynamics is studied with the help of the smallest throat radius.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2010年第3期25-31,共7页
Petroleum Geology & Oilfield Development in Daqing
基金
国家重点基础研究发展计划项目（2009CB219303）资助.
关键词
松辽盆地
扶杨油层
原始含油饱和度
最小含油喉道半径
Songliao Basin
Fuyang oil reservoirs
initial oil saturation
the smallest oil-bearing throat radius
