摘要
为了解决聚合物井下低剪切配注问题,研制了新型聚合物配注器。该配注器阻流段采用同心双环形连续扩缩管结构,对聚合物限流阻力大、剪切率低,当流量在25～170m3/d范围时,可产生压降1.5～3.6MPa,剪切降解率小于6%;配注器出口通道设计有低剪切洗井滑阀,具有反洗关闭、正注增阻的双重功能,可以避免地层返吐物堵塞水嘴,并实现反洗井,提高分注适应性,延长分注工艺有效期。现场应用42井次114套次,工艺成功率95%,取得了良好的应用效果。
A new kind of down-hole flow regulator for polymer flooding is developed to solve the problem of multi-layer separate injection at low shear rate. Provided with two concentric ring ripple pipes, the flow regulator exerts a large flow resistance on the polymer and therefore a low shear rate can be realized. When the flow rate is within 25-170 m3/d, a pressure drop of 1.5-3.6 MPa can be produced, and the shearing degradation rate of the polymer will be less than 6%. A slide valve which can be closed during back washing is fixed at the outlet of the flow regulator. The regulator has been used in 42 wells with good effect.
出处
《石油机械》
北大核心
2005年第8期33-34,3,共2页
China Petroleum Machinery
基金
中石化集团公司2001年科技攻关项目的部分研究内容
项目名称:改善聚合物驱开发效果技术
编号:P01045
