Method for determining free hydrocarbon enrichment aperture range

• Main Authors: LI ZHONGCHENG, SONG PENG, WANG HAILONG, LI YU, ZHANG GUOYI, ZENG FANCHENG, LIU YU, ZHANG XIN, XING JILIN
• Format: Patent
• Language: Chinese; English
• Published: 25.01.2022
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for determining a free hydrocarbon enrichment aperture range, and relates to the field of shale oil enrichment mechanisms. The method comprises the following steps: obtaining a shale sample and preparing a rock core column; performing a rock pyrolysis experiment on the rock core column to obtain an S1 value representing the free hydrocarbon content of the rock core column; obtaining accumulated pore volumes corresponding to different pore diameter ranges representing the core column; for any aperture range, analyzing the correlation between the S1 value and the accumulated pore volume corresponding to the aperture range; and determining the free hydrocarbon enrichment aperture range based on the correlation. According to the method provided by the embodiment of the invention, the relationship between the S1 value and the accumulated pore volumes corresponding to different pore size ranges is established, and the free hydrocarbon enrichment pore size range is determined through