中文摘要：

设计一种测定致密油聚集孔喉半径下限的方法．通过能谱仪测定碳含量判定喉道是否含油或烃类残留，采用环境扫描电镜多次测量、逐渐逼近，最终得到聚集孔喉半径下限．使用该方法测定四川盆地公山庙油田侏罗系沙溪庙组致密油聚集孔喉直径下限为44nm，通过拟合得到有效孔隙度下限值为1．4％，使沙溪庙组油藏资源量统计值增加了约29％．

英文摘要：

A laboratory method was designed to determine the oil/hydrocarbon residues. By using spectrometer and various other measurements the pore throat radius threshold of oil accumulation was gradually obtained in addition to using environmental scanning electron microscope. Results show that the pore throat radius threshold of sample from Jurassic sandstone oil reservoirs in Sichuan Basin is 44 nm and the lower limit of effective porosity is 1.4% , which effectively increases the reservoir resources statistics amount by about 29%.