根据声体波计算的Aigion10井（Corinth）中的水平应力模型
Model of horizontal stress in the Aigion10 well (Corinth) calculated from acoustic body waves
摘要：
本文试图从AIG 10井（Corinth Golf）689 ~ 1004米深度的超声波资料中推断地应力。该井眼穿过有能力的沉积层（主要是石灰岩）和769米至780米深的活动Aigion断层。本研究是作者先前描述的两种方法的应用，其显示了原地水平应力与（i）双体波的存在或不存在，（ii）S波和P波之间的振幅比之间的关系（Rousseau，2005 a，b）。该井的全波形显示出被Aigion断层分开的两个不同的域。在上部区域内可能出现三种典型波（P、S和斯通利波），但S波不多，没有双体波;而在下部区域内有时出现双P波，但没有S波。根据这些观测结果，我们得出Aigion断层上方的应力域是各向同性的，而下方是各向异性的结论，这与作者根据其他类型的数据得出的结论是一致的。对双P波特征的计算表明，这种水平应力各向异性很高，达190%，最大水平应力超过100 MPa，最小水平应力在939 m处接近于零。S波和P波之间的振幅比表明Aigion断层上方存在非常强的各向同性压缩。
英文摘要：
In this paper we try to deduce the in situ stresses from the monopole acoustic waves of the well AIG10 between 689 and 1004 meters in depth (Corinth Golf). This borehole crosses competent sedimentary formations (mainly limestone), and the active Aigion fault between 769 and 780 meters in depth. This study is the application of two methods previously described by the author who shows the relationships between in situ horizontal stresses, and (i) the presence or absence of double body waves, (ii) the amplitude ratios between S and P waves (Rousseau, 2005a,b). The full waveforms of this well exhibit two distinct domains separated by the Aigion fault. Within the upper area the three typical waves (P, S and Stoneley) may appear, but the S waves are not numerous, and there is no double body wave, whereas within the lower area there are sometimes double P waves, but no S waves. From those observations, we conclude that the stress domain is isotropic above the Aigion fault, and anisotropic below, which is consistent with conclusions drawn by authors from other kinds of data. The calculation applied to the characteristics of the double P waves suggests that this horizontal stress anisotropy is very high, up to 190 % with the maximum horizontal stress superior to 100 MPa and the minimum horizontal stress close to zero at 939 meters in depth. The amplitude ratios between the S and P wave indicate a very strong compression - which is isotropic - above the Aigion fault.
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