摘要
长庆油田鄂尔多斯盆地储层非均质性较强,不同储层渗透率差异明显。长期注水开发后,注水剖面严重不均匀。当井况恶化时,分层酸化受到限制。一般酸化过程中酸液容易进入高渗透储层。中、低渗透储层损害无法有效消除。相反,差异被放大了。通过室内试验,筛选出适合注水井酸化的暂堵剂和纤维。通过模拟试验,优化了暂堵酸化工艺参数。更有利于消除中低渗透伤害,改善吸水剖面,提高酸利用率。为非均质严重致密油藏低渗透层精细分层注水提供了新思路。现场试验1井次,技术成功率100%。
The reservoirs in Ordos Basin of Changqing Oilfield have stronger heterogeneity and the permeability of different reservoirs is obviously different.After long-term water injection development,water injection profile is seriously uneven.When the condition of the well is deteriorated,separate zone acidizing is limited.In general acidification the acid is easy to enter the high permeability reservoir.Medium and low permeability reservoir damage cannot be effectively eliminated.Instead,the differences are magnified.The temporary plugging agent and fibre for water injection well acidification were selected through laboratory experiments.The temporary plugging acidification process parameters were optimized by the simulation experiment.It is more conducive to removing the middle,low permeability damage and improve the water absorption profile and improve acid utilization rate.A new idea is provided for the fine stratified water injection of low permeability layer in the heterogeneous serious tight reservoir.Field experiment is 1 well times with technological successfulness of 100%.
作者
闫伟
张治东
惠瑞瑞
孟东飞
张献平
Yan Wei;Zhang Zhidong;Hui Ruirui;Meng Dongfei;Zhang Xianping(Yanchang Oilfield Xingzichuan Oil Production Plant,Yan an 710000,China)
出处
《粘接》
CAS
2021年第4期43-46,共4页
Adhesion
关键词
吸水剖面
暂堵酸化
一般酸化
储层损害
water absorption profile
temporary plugging acidification
general acidification
reservoir damage
