drive sweep

英 [draɪv swiːp]

美 [draɪv swiːp]

【电】被动扫描

The major disadvantage is the low drive force of the displacement fluid applied to the near-wellbore region, which results in poor sweep of highly sticky drilling fluid and the mud cake at the side bore and thus the incomplete displacement nearby the 2 interfaces.
轴向流顶替存在的最主要的缺点是顶替液对近井壁区的驱动能力弱，对边壁的高粘附钻井液及虚滤饼清除效果差，造成二界面附近难以被替净；
Compared with vertical injection pattern, horizontal injection pattern can form linear drive to put off water breakthrough, improve sweep efficiency and recovery.
结果表明：与直井注水相比，水平井注采井网可形成线性驱动，推迟注入水突破时间、提高波及效率、改善油藏开发效果；
The existence of interlayer is very favorable to dilate vertical swept volume and efficiency of water drive for the positive rhythm and block rhythm reservoirs, but it is unfavorable to enhance the sweep efficiency in the reverse rhythm reservoir.
隔夹层的存在有利于正韵律和块状韵律油层扩大纵向波及体积和驱油效率，不利于提高反韵律油层的注水波及效率。