石油地质与工程2025，Vol.39Issue(1)：21-25,33,6.
庆城油田页岩油水平井分段酸化解堵工艺
Segmented acidizing and plugging removal technology for shale oil horizontal wells in Qingcheng Oilfield
岳渊洲 1黄战卫 1刘环宇 1田伟东1
作者信息
- 1. 中国石油天然气股份有限公司长庆油田页岩油开发分公司,甘肃 庆阳 745400
- 折叠
摘要
Abstract
Shale oil reservoirs in Qingcheng Oilfield is developed by using the integrated volume fracturing technology of long horizontal well fracturing,energy enhancement,and permeability absorption(pressure enhanced permeability).In the initial stage,the output is high.However,as scaling occurs in the wellbore and near wellbore areas,the flow channels are blocked,leading to a rapid decline in production.Therefore,the composition analysis of sand scale cement was carried out,and an efficient scale dissolution composite acid system was selected,with a scale dissolution rate of over 90%under experimental conditions of 60℃.In acidizing process,the segmented acidizing pipe string is dragged through the optimal multi-stage sliding sleeve,and up to 10 sections of acidizing construction can be completed in one pipe string,achieving differ-entiated acidizing distribution in horizontal well sections.On site application of 33 wells,the average single well production capacity has been restored to 4.6 t/d,and the acidizing and unblocking effect is good.The composite acid staged acidizing and plugging removal process for horizontal wells in Qingcheng Oilfield can restore the production capacity of scaling and plugging wells,providing a good technical support for the sus-tained and stable production of shale oil horizontal wells.关键词
页岩油水平井/产出特征/结垢堵塞/分段酸化/产能恢复Key words
shale oil horizontal wells/output characteristics/scaling and plugging/segmented acidizing/recovery of production capacity分类
石油、天然气工程引用本文复制引用
岳渊洲,黄战卫,刘环宇,田伟东..庆城油田页岩油水平井分段酸化解堵工艺[J].石油地质与工程,2025,39(1):21-25,33,6.
