CAJ | 학술논문

利用物理模拟实验和基于逾渗理论的油气运聚模拟方法对石油二次运移优势路径形成影响因素进行模拟并探讨优势路径形成的动力学条件.研究表明,优势路径具有油运移前缘只沿一个或少数几个方向向上指进运移、运移路径窄及通过该路径油运移量较大的基本特征;模型颗粒表面亲水性越好、模型颗粒粒度越大、油水密度差越大、界面张力越小、孔喉直径越大、运移动力越小,油越易出现优势运移路径.系统的浮力与黏滞力竞争及毛细管力与黏滞力竞争中前者均处于优势是运移优势路径形成的动力学条件,且竞争优势越明显,油运移越易形成优势运移路径.该研究成果有助于了解和认识油气二次运移规律并为盆地尺度的油气运移模拟提供基础理论依据.图7参24
이용물리모의실험화기우유삼이론적유기운취모의방법대석유이차운이우세로경형성영향인소진행모의병탐토우세로경형성적동역학조건.연구표명,우세로경구유유운이전연지연일개혹소수궤개방향향상지진운이、운이로경착급통과해로경유운이량교대적기본특정;모형과립표면친수성월호、모형과립립도월대、유수밀도차월대、계면장력월소、공후직경월대、운이동력월소,유월역출현우세운이로경.계통적부력여점체력경쟁급모세관력여점체력경쟁중전자균처우우세시운이우세로경형성적동역학조건,차경쟁우세월명현,유운이월역형성우세운이로경.해연구성과유조우료해화인식유기이차운이규률병위분지척도적유기운이모의제공기출이론의거.도7삼24
Using the hydrocarbon migration modeling methods based on the percolation theory,in combination with physical experiments,we simulated the effect factors on and discussed dynamic conditions in forming preferable path for secondary migration of oil.The preferable path has the basic features that the front of migrating oil has only one or a few of upward finger advance,the migration path is narrow,and through the preferable path the migration oil amount is larger.The migration pattern may tend to form preferable path of secondary migration when the grain surface wettability gets better,the grain size and the density difference between oil and water get bigger,the interfaeial tension get smaller,the radius of pores and throats get bigger,and the migration force get smaller.During the buoyancy competing with viscous force and the capillary force competing with viscous force,if the former is dominant,the dynamic conditions for preferable path could be fulfilled.And the more obvious the dominance is,the more easily preferable path occurs.This study may shed some light on migration in nature and offer academic basis for simulation in sedimentary basins.