致密砂岩静态渗吸实验研究

Experimental Study on Static Imbibition of Tight Sandstone

吴润桐 杨胜来 王敉邦 吕道平 寇 根

Wu Runtong Yang Shenglai Wang Mibang Lyu Daoping Kou Gen

1.中国石油大学(北京)石油工程教育部重点实验室,北京102249; 2.新疆油田公司实验检测院,新疆克拉玛依834000

1.Key Laboratory of Education Ministry for Petroleum Engineering,China University of Petroleum (Beijing),Beijing 102249, China; 2.Research Institute of Experiment Testing,Xinjiang Oil field Company,Karamay Xinjiang 834000,China

关键词: 致密油, , 渗吸实验, , 渗吸机理, , 实验装置, , 渗吸效率

In order to research on the impact of imbibition effects, mechanisms and the correlation factors of the tight oil cores, the experimental devices of tight core imbibiton were established. The experiments of oil-water imbibition of tight sandstone were carried out. The effects of temperature, pressure and surfactant on the oil-water imbibition in compacted core were studied. The curves of imbibition efficiency versus time, characteristic points of curve and the influential factor of imbibition were analyzed. The imbibition law and characteristics of tight sandstone core were obtained. The results showed that the effect of imbibition was mainly occurred on the surface layer of the tight oil core. The temperature had a large effect on the second stage of imbibition. The oilwater imbibiton efficiency of the single tight oil core is about 10%, which is about 25% under the formation conditions.

国家973项目(2015CB250904);国家自然科学基金项目(51574257)

10.3969/j.issn.1672-6952.2017.03.006