原油族组分在煤中留存能力的研究

研究了煤及其干酪根对不同组分油气的留烃能力.将原油分成5个组分,引入溶胀理论,对低、中、高成熟度的煤及其干酪根在不同溶解度参数的溶剂中进行了溶胀实验,获得不同成熟度的煤及其干酪根的溶胀特征,进而得到不同成熟度的煤及其干酪根对5个组分的留烃能力.R°在0.4%～1.25%范围内的煤及其干酪根,其溶胀比随着煤的成熟度增加而降低;而R°大于1.25%的干酪根,其溶胀度则随着Ⅲ型干酪根的成熟度的增加而升高.在"油窗"范围内,随着成熟度的变化,煤和Ⅲ型干酪根的溶胀比降低,表明其留烃能力在下降.对于具有中等溶解度参数的组分,其留烃能力下降约20%.

Retention potential of oil group-type in coals

The retention potential of the oil group-type in coals and their kerogen is studied. The crude oil is divided into five group-types. The polymer solution theory is applied to interpret the retention potential of the oil group-type in coals. The solvents with different solubility parameters are used to determine the swelling ratio of coals and their kerogen with low, middle and high maturity. The characteristics of the swelling ratios of coals and their kerogen with different maturity and the retention potential of the oil group-types in the coals and their kerogen are obtained. The swelling ratio of coals with the vitrinite reflectance from 0.40%to 1.25?creases with increasing maturation. However, the swelling ratios increase with increasing maturation when the reflectance of coals is greater than 1.25%. In the "oil window", the swelling ratios of the coal and their kerogen decrease with increasing maturation, indicating that the retention potential of the oil group-types decrease in the coals. The retention potential decreases by about 20%for the oil group-type with middle solubility parameter.