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首页> 外文期刊>SPE Drilling & Completion >First Downhole Application of Distributed Acoustic Sensing for Hydraulic-Fracturing Monitorino and Diaqnostics
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First Downhole Application of Distributed Acoustic Sensing for Hydraulic-Fracturing Monitorino and Diaqnostics

机译：分布式声波传感技术在水力压裂监测与诊断中的首次井下应用

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The first exploration-and-production downhole field trial of distributed acoustic sensing (DAS) fiber-optic technology was conducted during the completion of a tight gas well in February 2009.rnDAS is a novel technology that allows the detection, discrimination, and location of acoustic events on a standard telecom single-mode fiber several kilometers long. Using a combination of the measurement of backscattered light and advanced signal processing, the DAS interrogator system segregates the fiber into an array of individual microphones. To date, the technology has been applied mainly in the defense and security industries. One of the most exciting applications for downhole application of DAS is in the area of hydraulic fracturing of tight-sand and shale-gas reservoirs. Balancing the cost of hydraulic-fracture stimulation with the production benefit is crucial in tight-sand and shale-gas developments because, after drilling costs, the completion is the largest single cost component of the well.rnRecordings can be made while tools are run in hole, bridge plugs are set and perforations are shot and during the fracture-stimulation treatment. The technology is sufficiently reliable and sensitive to detect and monitor these in-well activities. The fidelity of the recordings made during hydraulic-fracturing and flowback operations provides a step-change improvement in the ability to perform real-time and post-job diagnostics and analyses of the stimulation.rnThe different case studies presented in this paper will illustrate how, even in its earliest form, DAS has the potential to enhance the capability of monitoring and understanding in-wellbore activities. The technology enables the optimization of hydraulic-fracturing design and execution, which can drive down completion costs and lead to increased well productivity and ultimate recovery.
机译：分布式声传感（DAS）光纤技术的首次勘探与生产井下现场试验是在2009年2月的一口气密井完工期间进行的。rnDAS是一项新颖的技术，可以检测，判别和定位天然气。几公里长的标准电信单模光纤上的声音事件。 DAS询问器系统结合了对背向散射光的测量和先进的信号处理功能，将光纤隔离成单个麦克风阵列。迄今为止，该技术已主要应用于国防和安全行业。 DAS井下应用最激动人心的应用之一是在致密砂岩和页岩气储层的水力压裂领域。在致密砂岩和页岩气开发中，平衡水力压裂增产成本与生产效益至关重要，因为在钻井成本之后，完井是油井中最大的单一成本组成部分。在裂缝刺激处理期间，设置孔眼，设置桥塞并打孔。该技术具有足够的可靠性和敏感性，可以检测和监视这些井内活动。在水力压裂和回流作业过程中所记录的保真度在执行实时和作业后诊断以及对刺激进行分析的能力方面提供了逐步变化的改进。本文中介绍的不同案例研究将说明如何，即使是最早的形式，DAS也有可能增强监视和了解井眼活动的能力。该技术可以优化水力压裂的设计和执行，从而降低完井成本并提高油井生产率和最终采收率。

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