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首页> 外文会议>International Conference on Ocean, Offshore and Arctic Engineering >PRESSURE TESTING OF BARRIER INTEGRITY
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PRESSURE TESTING OF BARRIER INTEGRITY

机译：屏障完整性的压力测试

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Plug and abandonment of a well is expected to ensure that the sealing integrity of the cap rock is restored. This also implies that the annulus between casing and rock is sealed off. Some formations may under the right conditions close in on the casing, providing a highly valuable contribution to the sealing. Although acoustic tools may be used to evaluate whether there is casing contact, the hydraulic integrity of such a barrier must be established by field testing for all potential formations. While the main focus here is on natural shale barriers, the analysis and conclusions apply equally well to testing of cement based and other barriers. This paper discusses two pressure integrity tests that are used for this purpose, the XLOT-type test and the communications test. The test procedures are outlined, and the expected sensitivity is estimated. In particular, it is shown that temperature effects may complicate test interpretation, possibly giving both false acceptance and false rejections of tests. Hence, it is of vital importance to include temperature measurements in the evaluation of the tests. It is estimated that the leakage detection limit of both tests is significantly higher than the target value needed to ensure that sealing integrity has been restored. This calls for improvements of the testing procedures.
机译：插头和阱的放弃，预计以确保盖层的密封完整性被恢复。这也意味着，外壳和岩石之间的环形空间被密封。一些构造可以在适当的条件下关闭的外壳，提供给密封高度宝贵的贡献。虽然声工具可以用来评估是否外壳接触，这种屏障的完整性液压必须对所有潜在的地层现场测试来确定。虽然这里的主要焦点是天然页岩屏障，分析和结论也同样适用于水泥和其他障碍的测试。本文讨论用于此目的，XLOT型试验和通信测试两个压力完整性测试。的测试程序概述，以及预期的灵敏度估计。特别是，它表明温度的影响可能变得复杂测试解释，可能设定的两个错误接受和测试假否认。因此，它是至关重要的，包括在测试中的评估温度测量。据估计，这两个测试的漏电检测限比需要确保密封的完整性已经恢复目标值显著更高。这就要求的测试程序的改进。

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