聚驱采出井不同射孔形式下开发效果对比  

Comparison of Development Effect Under Different Perforation Forms in Polymer Flooding Production Wells

作　　者：李国新[1] LI Guoxin(No.5 Oil Production Plant of Daqing Oilfield,Daqing Heilongjiang 163513,China)

机构地区：[1]大庆油田第五采油厂,黑龙江大庆163513

出　　处：《海洋石油》2023年第2期44-47,83,共5页Offshore Oil

摘　　要：为改善聚驱开发中油层动用不均衡的状况,有效开采厚油层内部未被动用的剩余油。以X油田聚合物驱A块为研究对象,基于油层物性,结合油层动用状况,建立特高含水层识别标准。对厚油层采取“避射+补射”的射孔方式,即投产初期避射特高含水层段,含水回升初期补开避射层段,继续聚驱开发。研究表明,无隔层的厚油层:I类避射井采收率最低,II类避射井采收率最高,非避射井采收率介于二者之间;含有隔层的厚油层:III、IV类避射井采收率均高于非避射井。对于同一类油层,无论厚油层有无隔层,优先射开底部油层,均有助于提高采收率。研究结果可应用到其他聚驱区块,取得较好开发效果,为聚驱开发提供宝贵经验。This paper aims to improve uneven reservoir utilization in polymer flooding development and effectively exploit unutilized remaining oil in thick reservoir.Taking polymer flooding block A of X oilfield as the research object,based on reservoir physical properties,combined with reservoir operation status,the identification standard of ultra-high water cut was established.For the thick oil layer,the perforation method of"evading+replenishment"is conducted,which means avoiding perforating the ultra-high water cut section in the early stage of production,then perforating the ones that have been evaded in the early stage of water cut recovery,so as to continue the cluster flooding development.Studies have shown that for the thick oil layer with no isolation layer:type I avoiding shooting wells have the lowest recovery rates,while type II has the highest recovery rates.Non-avoiding shooting wells have the recovery rates in between.For the same type of reservoir,regardless of thick reservoir with or without spacer,it is beneficial to improve oil recovery by preferentially shooting off the bottom reservoir.The results of this study have been applied to other polymer flooding blocks and works well,which provides valuable experience for polymer flooding development.

关 键 词：油层物性 油层动用状况 射孔方式 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]