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在过去的几年中,光纤技术用于油井和油藏监测取得了巨大的进展,但是油田光纤的研发大都集中在基于温度、压力和流速测量等方面,迄今,几乎没有发表过有关光纤技术在监测油井管柱和套管变形领域的文章。本文将报告实时的基于纤维光学的套管成像仪的最新进展情况,该装置设计用于对套管或油井管柱形状连续的、高分辨率的监测,使作用于油井上应力的确定成为可能。小比例的和全套管尺寸的实验室实验表明,该系统的最新一代产品具有足够的敏感性,它可探测到每100ft小于10°的套管变形,压缩应力和轴向拉伸应力探测范围从不足0.1%到10%,本文将对技术背景、测量敏感性、应力响应特性等加以讨论。回顾了现场试验结果,阐明了实时套管变形监测如何成为油藏监测策略的一个重要组成部分。
In the past few years, optical fiber technology has made tremendous progress in the monitoring of oil wells and reservoirs. However, the research and development of optical fibers in oilfields are mostly based on the measurement of temperature, pressure and flow rate. To date, few published optical fiber technologies have been published Articles to monitor the deformation of well pipe strings and casing. This article reports on the latest developments in real-time fiber-optic casing-based imagers designed for continuous, high-resolution monitoring of casing or well string shapes, making it possible to determine the stresses acting on the well . Small-scale and full-pipe laboratory tests have shown that the latest generation of the system is sufficiently sensitive to detect casing deformations of less than 10 ° per 100 ft. Compressive stress and axial tensile stress detection range from Less than 0.1% to 10%, this article will be technical background, measurement sensitivity, stress response characteristics are discussed. The field test results are reviewed to illustrate how real-time casing deformation monitoring can become an important part of reservoir monitoring strategies.