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高效的防漏机理使微泡工作流体有利于特定的修井完井作业,同时能有效减少流体与流体之间以及流体与地层岩石之间的交互作用,避免储层伤害;微泡流体可有效循环到地面,从而达到修井作业目的。微泡流体作为完井液和修井液的应用实例还没有得到广泛的报道。本文报道了微泡流体技术在完井及修井作业方案中的三个应用实例,旨在介绍应用微泡流体过程中取得的操作经验和教训,并进一步讨论所观察到的微泡清洁地层特性。三个应用实例为:用油基微泡体系作为压井液进行双油管酸性气体井的完井作业,作业过程中压井液没有向压裂地层漏失;在枯竭白云石质石灰岩地层附加层的2口井的完井作业中,应用微泡流体技术明显减小了流体漏失;在使用带有封隔器的油管进行深层水力压裂时,应用微泡流体技术能够避免因液柱在浅层环空形成的压力接近水力压裂压力而造成的不良后果。
Efficient leakproof mechanism makes the microfluidic working fluid work for a specific workover well and at the same time can effectively reduce the interaction between the fluid and the fluid and between the fluid and the formation rock to avoid reservoir damage; the microbubble fluid can be effective Circulation to the ground, so as to achieve the purpose of workover. Microfoam fluid as a completion fluid and workover fluid application examples have not been widely reported. This paper reports three examples of application of micro-bubble fluid technology in well completion and workover programs to introduce the operational experience and lessons learned in the application of micro-bubble fluid and to further discuss the observed properties of micro-bubble clean formation . Three application examples are as follows: oil-based microbubble system is used as killing fluid for completion of double-tubing acidic gas well, and the kill fluid is not lost to the fractured formation during the operation; in the depletion of additional layers of dolomitic limestone stratum In the completion of 2 wells, the application of micro-bubble fluid technology significantly reduces the fluid loss; when using the tubing with packer for deep hydraulic fracturing, the application of micro-bubble fluid technology can avoid the liquid column in the shallow The pressure of annulus formation is close to that of hydraulic fracturing pressure.