摘要:
为了提高中国深水油气田的开采效率、降低深水完井的作业风险,研究并推广应用了深水压裂充填完井技术。在介绍深水压裂充填完井技术工艺特点、分析完井管柱设计原理的基础上,结合深水井的井况和特点,对深水完井作业准备及施工措施进行了优化,形成了一套完善的深水下部完井作业技术,包括优化平台布局、完井液管理、井筒一趟式清洗、射孔及压裂充填联作、精细施工等措施。利用该技术在南海某深水区块施工8口井,单井平均作业时间12.53 d,防砂成功率100%,后期地面测试表明,各井含砂量及产量均达到投产要求。现场应用表明,该技术防砂及增产效果明显,可以有效提高作业效率,特别适用于钻井作业结束后快速、批量完井作业。
关键词:
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深水
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完井
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射孔
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压裂
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砾石充填
Abstract:
In order to improve the recovery efficiency of deepwater oil and gas fields in China and reduce risk in deep-water completion,we developed and promoted the application of deep-water frac-pack completion.This paper gives a brief introduction of features of the technique and the design principles of the completion string,then presents the optimization of preparation and execution of deep-water completion according to the conditions and characteristics of deep-water wells.A complete set of techniques for lower section completion for deep water wells are formed including optimization of platform layout,completion fluid management,one trip wellbore cleaning,the joint operation of perforation and frac-pack,and precise operation,etc.This technology has been used in 8 wells in the eastern South China Sea deep-water cooperation blocks.With an average operating time of 12.53 d,it reached 100% success ratio in sand control.The data of well test shows that sand content and production of all the wells meets the requirement on commissioning.The technique fills the gap in deep-water well completion in eastern region of the South China Sea.Field application shows that the technique works well in sand control and production improvment,and can improve operation efficiency considerably.It is especially suited for fast and batch completion operations after drilling.
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