CAJ | 학술논문

根据吉林油田某区块的油藏条件,运用数值模拟软件,研究不同韵律储层驱油效果。数模结果显示,注水开发时,均质储层的开发效果最好,反韵律储层次之,正韵律储层最差。气水交替驱时,均质储层的开发效果最好,正韵律储层次之,反韵律储层最差。注水开发与交替驱开发规律的差异,其根本原因是由CO2、油和水的密度差异造成的。水驱油时,水容易沿储层下部快速推进,反韵律储层减缓了这一趋势。气驱油时,CO2容易沿储层上部快速推进,正韵律储层减缓了这一趋势。注水开发时,要优选均质储层,其次是反韵律储层。交替驱开发时,要优选均质储层,其次是正韵律储层。
근거길림유전모구괴적유장조건,운용수치모의연건,연구불동운률저층구유효과。수모결과현시,주수개발시,균질저층적개발효과최호,반운률저층차지,정운률저층최차。기수교체구시,균질저층적개발효과최호,정운률저층차지,반운률저층최차。주수개발여교체구개발규률적차이,기근본원인시유CO2、유화수적밀도차이조성적。수구유시,수용역연저층하부쾌속추진,반운률저층감완료저일추세。기구유시,CO2용역연저층상부쾌속추진,정운률저층감완료저일추세。주수개발시,요우선균질저층,기차시반운률저층。교체구개발시,요우선균질저층,기차시정운률저층。
According to a certain block in Jilin Oilfield,displacement efficiencies of different rhythmic reservoirs were studied by using numerical simulation. The results of numerical simulation show that for waterflooding development,order of displacement efficiency is homogeneous reservoir reverse rhythm reservoir positive rhythm reservoir; for gas-alternating-water flooding development,order of displacement efficiency is homogeneous reservoir positive rhythm reservoir reverse rhythm reservoir. The difference of development law between wateflooding and CO2 flooding is fundamentally caused by density difference between CO2,oil and water. When water drives oil,water advances easily and rapidly along the lower part of reservoir and the trend is slowed down in reverse rhythm reservoir. However,when gas drives oil,CO2 advances easily and rapid along the upper part of reservoir and the trend is slowed down in positive rhythm reservoir. Therefore,when waterflooding develops,the first is the homogeneous reservoir,and the second is the reverse rhythm reservoir. When gas-alternating-water flooding develops,the first is the homogeneous reservoir,and the second is the positive rhythm reservoir.