渤海海上疏松砂岩油田大通径分层注水一体化工艺管柱设计  

Design of large diameter stratified water injection integrated process string in offshore unconsolidated sandstone oilfield in Bohai sea

作　　者：陈华兴 周玉刚 代磊阳 潘定成 冯阳 高永华 罗少锋 CHEN Huaxing;ZHOU Yugang;DAI Leiyang;PAN Dingcheng;FENG Yang;GAO Yonghua;LUO Shaofeng(CNOOC China Limited,Tianjin Branch,Tianjin 300456,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300456

出　　处：《中国海上油气》2024年第3期167-173,共7页China Offshore Oil and Gas

摘　　要：渤海海上疏松砂岩油田注水井采用机械筛管防砂,造成井眼内通径小,易出现管柱拔不动、拔断等复杂情况,导致注水井大修费用高、工期长、工序复杂等问题。通过分析机械防砂注水管柱问题,设计了大通径分层注水一体化工艺管柱,该工艺管柱关键工具包括穿线缆顶部封隔器、穿线缆隔离封隔器、缆控智能配水器、伸缩短节、液压油管锚,并对管柱进行了安全校核。所设计的大通径分层注水一体化工艺管柱可通过一次打压实现所有封隔器坐封、上提管柱,实现整体管柱逐级解封,井筒内无需留防砂工具,提高了完井时效,扩展了井筒内通径,降低了水井后续大修风险和大修难度。大通径分层注水一体化工艺管柱在渤海P油田成功应用,实现了?177.8 mm套管大通径分6层有缆智能测调注水,完井工期提效21.8%,有效避免机械防砂管柱后期复杂情况处理尺寸受限的问题,应用效果良好,可作为配合瘦身后小井眼注水井的首选工艺技术推广应用。The mechanical screen for sand control of water injection well in Bohai offshore loose sandstone oil field leads to small wellbore diameter and complex situations such as inability to pull out and broken.This may result in the problems of high cost,long period and complicated process of water injection well.By analyzing the problems of mechanical sand control injection string,the integrated process of large-diameter stratified injection string is designed.The key tools of this process string include cable top packer,cable isolation packer,cable controlled intelligent water distributor,extender and reducer and hydraulic tubing anchor.The safety check of this string is carried out.The designed large-diameter stratified water injection integrated process string can achieve the setting of all packers through one pressure.The string can be lifted up to realize the step-by-step release of the whole string.Sand control tools are not needed in the wellbore,which reduces the completion time.The diameter inside the wellbore has been expanded,reducing the risk and difficulty of subsequent major repairs of the well.The integrated technology of large-diameter stratified water injection string has been successfully applied in Bohai P oilfield,achieving intelligent measurement and injection of 6-layer cable in$177.8 mm casing with large-diameter.The completion period has been improvd by 21.8%,effectively avoiding the problem of limited size in the late complex situation of mechanical sand control pipe string,and achieving good application effect.This technology can be used as the preferred technology for slimming small hole injection well.

关 键 词：渤海 疏松砂岩 大通径 分层注水 一体化工艺 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]