| 李佩笑,林伟军,张秀梅.分扇区水泥胶结测井胶结质量的定量评价研究*[J].,2016,35(1):27-35 |
| 分扇区水泥胶结测井胶结质量的定量评价研究* |
| Research on quantitative evaluation of cementing quality using the segmented bond logging technique |
| 投稿时间：2015-04-27 修订日期：2015-12-23 |
| 中文摘要: |
| 为了实现分扇区水泥胶结测井仪（SBT）对第二界面（水泥-地层界面）的检测，本文在不改变SBT声系基本结构的基础上，通过优化声源入射角，提出检测水泥胶结质量的新方法，以弥补以往方法无法对二界面进行定量检测的不足。本文首先分析了不同充液条件下薄壁管中激发的模态波的频散特征；之后应用三维有限差分算法模拟薄壁管和实际物理模型在斜入射声源激励下的声场，根据计算结果提出激励速度“平台”上的模态有利于检测界面胶结质量；最后开展了一系列波场模拟与分析，对应用接收信号定量评价一二界面水泥胶结质量的可行性进行了论证。数值模拟分析认为，特定的入射角可以激励出对应速度“平台”处的模态，模态波的特征可以较好的体现在接收信号中，且其幅度衰减程度可以用于判断水泥的胶结质量。该成果为套管井二界面水泥胶结质量的定量检测提供了研究基础。 |
| 英文摘要: |
| Based on the Segment Bond Tool (SBT) structure, a new method using obliquely incident ultrasonic wave is explored to improve the quantitative evaluation of cementing quality on the second interface. Firstly, the dispersion relations of pipes under different conditions are analyzed. Then, finite difference algorithm is applied to simulate the acoustic fields of the pipe and physical model which both motivated by obliquely incidence wave, the simulation results suggest the modes on the 'plateau' help evaluation. The acoustic fields of the cased wells with different cementing qualities are simulated and the received waves are used to demonstrate the feasibility of cementing evaluation. Results show the modes on the 'plateau' can be motivated by obliquely incidence wave and the modes' amplitude attenuation can be used to evaluate the cementing quality. This method provide the basis for quantitative evaluation of cementing quality on the second interface. |
| DOI：10.11684/j.issn.1000-310X.2016.01.005 |
| 中文关键词: 套管井 三维有限差分 二界面检测 |
| 英文关键词: Cased well, 3D finite difference, Second interface |
| 基金项目:国家重点基础研究发展计划（973计划）;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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