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首页> 外文会议>Abu Dhabi International Petroleum Exhibition Conference >Efficiency and Innovation for Borehole Seismic Acquisition in a Well Completed with Permanent Fiber: DAS Technology for Saving Time and Minimizing Risk
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Efficiency and Innovation for Borehole Seismic Acquisition in a Well Completed with Permanent Fiber: DAS Technology for Saving Time and Minimizing Risk

机译：用永久纤维完成井井土地震射击效率和创新：DAS技术节省时间，最大限度地减少风险

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Efficiency is a key factor on any operation. In this paper, we introduce the heterodyne Distributed Vibration Sensing (hDVS), which is an innovative technology based on fiber optic system to improve the duration of borehole seismic operations. We designed a survey aimed at comparing standard downhole geophone accelerometers measurements to i) optical fiber seismic installed inside the hybrid Wireline cable and ii) optical fiber clamped permanently to the well completion tubing. This comparison was conducted using a standard rig source VSP in association to advanced Offsets VSP. The purpose of the study was to evaluate this innovative technology and to assess the feasibility of drastic operation time reduction without compromising output data quality. To better evaluate the readiness of the technology, we decided to compare three distinct types of downhole measurements and designed a specific advanced acquisition which allowed us to compare various configurations. Consequently, the borehole seismic acquisition performed in the MR-SE1 well located in Makhrouga field (Tunisia) was split into two phases. Phase #1: during open-hole Wireline logging, using the standard downhole geophone accelerometers (VSI) and fiber optic seismic cable (single-mode cable) installed inside the Wireline logging cable (called hybrid Wireline cable). Phase #2: at the departure of the drilling rig, using a fiber optic seismic cable (single-mode cable) installed permanently along the intelligent completion. The results highlight the effectiveness of the hDVS technology with a proven decrease on operation timing, with reliable and good SNR recorded data. Nowadays, efficiency is a key requirement for any data acquisition process. The heterodyne Distributed Vibration Sensing (hDVS) is an innovative technology designed to achieve such effectiveness by making the Vertical Seismic Profile (VSP) a matter of minutes instead of hours, as using standard downhole equipment, without compromising output data reliability and allowing the measurements repeatability (no well interventions required). Finally, based on the quality of the dataset acquired, further analysis can be conducted for imaging purpose by analyzing the reflected waveforms, which could bring additional information and could change the way we are operating.
机译：效率是任何操作的关键因素。本文介绍了基于光纤系统的创新技术，介绍了外差分布式振动传感（HDV），以改善钻孔地震作业的持续时间。我们设计了一个针对据比较I）光纤地震仪测量的调查，该测量在混合型电缆和II）中安装在混合型电缆内部的光纤地震，光纤永久地夹紧到井上完成管道。使用标准钻机源VSP与高级偏移vsp进行此比较。该研究的目的是评估这种创新的技术，并评估剧烈操作时间减少的可行性，而不会影响输出数据质量。为了更好地评估技术的准备情况，我们决定比较三种不同类型的井下测量，并设计了特定的高级获取，使我们能够比较各种配置。因此，在位于Makhrouga（突尼斯）的MR-SE1孔中进行的钻孔地震采集被分成两相。阶段＃1：在开孔有线测井期间，使用安装在有线测井电缆（称为混合电缆电缆）内安装的标准井下地震孔加速度计（VSI）和光纤地震电缆（单模电缆）。阶段＃2：在钻机的出发时，使用沿智能完成永久安装的光纤地震电缆（单模电缆）。结果突出了HDVS技术的有效性，经过验证的操作时机减少，可靠且良好的SNR记录数据。如今，效率是任何数据采集过程的关键要求。外差分布式振动传感（HDV）是一种创新技术，旨在通过使垂直地震型材（VSP）进行分钟而不是小时，而不是使用标准的井下设备来实现这种有效性，而不会影响输出数据可靠性并允许测量重复性（不需要干预措施）。最后，基于所获取的数据集的质量，通过分析反射波形可以进行进一步分析，可以带来额外信息并可以改变我们运行的方式。

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