相控圆弧阵声波辐射器在井旁地层中产生的声场特征

doi:10.7623/syxb201002030

石油学报 ›› 2010, Vol. 31 ›› Issue (2): 343-346.DOI: 10.7623/syxb201002030

• 石油工程 • 上一篇

相控圆弧阵声波辐射器在井旁地层中产生的声场特征

车小花乔文孝鞠晓东

中国石油大学油气资源与探测国家重点实验室北京 102249

收稿日期:2009-03-01 修回日期:2009-05-25 出版日期:2010-03-25 发布日期:2013-10-31
通讯作者: 车小花

Characteristics of acoustic field generated by acoustic phased arc array transmitter in the borehole formation

CHE Xiaohua QIAO Wenxiao JU Xiaodong

Received:2009-03-01 Revised:2009-05-25 Online:2010-03-25 Published:2013-10-31
Contact: CHE Xiaohua

摘要/Abstract

摘要：

常规的单极子声波测井仪器无法对井旁地层的方位性质进行评价，多极子声波测井仪器有一定的方位测量能力，方位分辨率较低且反演地层性质时存在多解性。设计了一种具有方位辐射特性的声波测井相控圆弧阵声波辐射器，采用三维有限差分法对其在井旁地层中产生的声场进行了数值模拟。对模拟声场的方位特征进行的分析表明：相控圆弧阵声波辐射器产生的声波能量基本向某一周向角范围的井壁入射，进入地层的声波在一定周向角范围内传播。随着轴向源距的不断增大，相控圆弧阵声波辐射器在井旁地层中产生的声束周向角宽度逐渐变大。这种相控圆弧阵声波辐射器可用于方位反射声波测井新技术中，能评价井旁地层声学性质沿井周方向的变化，有助于复杂油气藏的识别和评价。

关键词: 声波测井, 相控圆弧阵声波辐射器, 井旁地层, 方位特征, 声场, 有限差分法

Abstract:

The conventional acoustic logging tools with monopole source cannot be used to evaluate the azimuth properties in the borehole formation. The multi-pole acoustic logging tools have a certain limited ability for the azimuth measurement, such as low resolution of azimuth measurement and multi-solution in the inversion of formation information. An acoustic phased arc array transmitter with azimuth radiation was designed. The acoustic field generated by the acoustic phased arc array transmitter in the borehole formation was simulated using the 3D finite difference method. The analysis on the numerical simulation results of the azimuth characteristics of the acoustic field generated by the transmitter showed that the acoustic energy generated by the phased arc array transmitter could radiate onto the sidewall of oil well in a certain azimuth range. The acoustic energy could be transmitted into the borehole formation propagated in a certain azimuth range, too. The azimuth lobe width of the acoustic beams became wider as the axial offset increased. The acoustic phased arc array transmitter can be used in azimuth acoustic reflection logging and evaluate the azimuth variation of acoustic properties in the borehole formation and also be useful for complex reservoir recognition and evaluation.

Key words: acoustic logging, acoustic phased arc array transmitter, borehole formation, azimuth property, acoustic field, finite difference method

车小花乔文孝鞠晓东. 相控圆弧阵声波辐射器在井旁地层中产生的声场特征[J]. 石油学报, 2010, 31(2): 343-346.

CHE Xiaohua QIAO Wenxiao JU Xiaodong. Characteristics of acoustic field generated by acoustic phased arc array transmitter in the borehole formation[J]. Editorial office of ACTA PETROLEI SINICA, 2010, 31(2): 343-346.

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相控圆弧阵声波辐射器在井旁地层中产生的声场特征

Characteristics of acoustic field generated by acoustic phased arc array transmitter in the borehole formation

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