有缆分层注水一体化工艺的创新应用

Innovative application of the integrated process of zonal water injection with cables

随着渤海油田稳产高产、增储挖潜工作的深入开展,薄层油藏、低渗油藏、岩性小油藏等非主力油藏的开发利用显得越来越紧迫。以油藏地质分析及管柱配伍性研究成果为基础,设计研发了有缆分层注水一体化工艺,该工艺抛弃注水井原有防砂模式(外层防砂管柱+内层注水管柱),创新采用分层封隔器和中心管一体化形式的管柱灵活分层注水。通过进一步改进,这种模式能满足智能化注水(有缆测调、无缆测调等)工况需求,同时具备大排量注水、灵活分层、管柱遇卡率低、施工工期短等特点,优势明显。目前该技术已成功在渤海油田应用13井次,效果良好。

With production stability,high production,increasing the reserves and tapping the production potential in Bohai Oilfield,it becomes increasingly urgent to develop and utilize non main reservoirs,such as thin interbed reservoirs,low permeability reservoirs,small lithology reservoirs,etc.In this paper,an integrated process of zonal water injection with cables was designed and developed based on the research results of reservoir geological analysis and column compatibility.In this process,a flexible zonal water injection string integrating a zonal packer and center tube was innovatively used instead of the original sand control mode(outer sand control tubing+inner water injection string)of water injection wells.Through further improvement,this process meets the requirements of intelligent water injection(testing and adjustment with cables,testing and adjustment without cable,etc.),and has obvious advantages,such as large displacement water injection,flexible zonal water injection,low casing sticking rate,short construction period,etc.This technology has been successfully applied 13 times in Bohai Oilfield,with good results.