全直径岩心中油相吸附的实验研究  

Experimental Study of Oil Phase Adsorption in Full-Diameter Core

作　　者：杨子清[1] 樊建明[1] 张庆洲[1] 

机构地区：[1]长庆油田分公司超低渗透油藏研究中心

出　　处：《低渗透油气田》2013年第1期135-138,共4页

摘　　要：国内外学者多年的研究，绝大多数已证明多孔介质吸附对油气体系相态或相平衡是有影响的，但是由于缺乏多孔介质对油相吸附的基础数据，还无法实现对原油相态影响的定量描述。为了解决这一问题，本文设计了全直径岩心吸附装置和常规吸附装置，测试了常压、28．5℃下，真实岩心对烃类流体的吸附程度，研究成果认为：①油相溶液中重组分的表观吸附量曲线基本都是开口向上的，都是随着烃类流体浓度的增大，重组分的相对吸附量逐渐变小，至最小后，然后吸附量逐渐大，重组分烃的吸附与浓度有关；（④不论是在渗透率为20mD的全直径岩心，还是在渗透率为80mD的全直径岩心中作吸附实验．相对岩心质量的表观吸附量基本上都介于10～-10^-3mol／kg之间，其相对岩心质量的表观吸附量的相对值在数量级上比较接近。The vast majority of researches by scholars at home and abroad for many years have proved that the porous media adsorp- tion is influential to the phase behavior or phase equilibrium of the petroleum system. But due to lack of basic data of oil phase adsorption of the porous media, the impact to the phase behavior of crude oil cannot be quantitatively described. In order to solve this problem, we designed the full-diameter cores adsorption apparatus and the conventional adsorption apparatus, and tested the adsorp- tion degrees of real cores for the hydrocarbon fluid at atmospheric pressure and 28.5℃. The research results show that： （ 1 ） the apparent adsorbed amount curves of the heavy components in the oil phase solution are basically upward opening. With the increasing of concentration of the hydrocarbon fluid, the relative adsorbed amount of the heavy components becomes gradually smaller, finally to the minimum, and then the adsorbed amount gradually increases. So the adsorption of the heavy-component hydrocarbons is related to its concentration; （2）whether the adsorption experiments done in the 20 mD or 80 mD permeability full-diameter cores, the apparent adsorption amount of the relative core quality is basically between 0.1-0.001 mol/kg. The relative values of the amount of apparent adsorption on the relative core mass are relatively close in magnitude.

关 键 词：全直径岩心 油相吸附 实验研究 

分 类 号：TE341[石油与天然气工程—油气田开发工程]