縱波速度徑向?qū)游龀上穹治?/H1>
發(fā)布時間：2018-08-28 12:17
【摘要】：鉆井會造成近井壁附近巖石的聲學(xué)性質(zhì)改變,為研究縱波徑向探測特性,本文使用徑向柱狀分層模型,應(yīng)用二維軸對稱有限差分法詳細(xì)考察了過渡帶厚度、聲源頻率以及接收器源距變化下,單極子測井響應(yīng)的變化特征,并采用慢度-時間相關(guān)法研究了不同條件下所測量到的聲速變化。最后基于射線理論,分析了不同條件下的首波到時變化特征�；诘貙铀俣戎饾u增加的模型表明,縱波的徑向探測特性受源距影響較大,通過不同源距信號的組合,可以實(shí)現(xiàn)對近井壁縱波速度進(jìn)行層析成像。
[Abstract]:Drilling will change the acoustic properties of rocks near the wellbore. In order to study the radial detection characteristics of longitudinal waves, the thickness of the transition zone is investigated in detail by using the radial columnar stratification model and the two-dimensional axisymmetric finite difference method. The characteristics of the response of monopole logging with the variation of source frequency and receiver distance are studied. The measured changes of sound velocity under different conditions are studied by using slow-time correlation method. Finally, based on the ray theory, the first wave arrival characteristics under different conditions are analyzed. Based on the model of increasing formation velocity, it is shown that the radial detection characteristics of P-wave are greatly affected by source distance, and the tomography of longitudinal wave velocities near well wall can be realized by the combination of different homologous distance signals.
【作者單位】： 中國科學(xué)院聲學(xué)研究所聲場與聲信息國家重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);北京市海洋深部鉆探測量工程技術(shù)研究中心;
【基金】：國家自然科學(xué)基金項(xiàng)目(11374322,11574347)
【分類號】：O429
【相似文獻(xiàn)】
相關(guān)期刊論文 前1條
1 笪天錫;超聲在測試物體內(nèi)平自由表面上反射特異現(xiàn)象的研究[J];重慶大學(xué)學(xué)報(bào)(自然科學(xué)版);1983年02期
，
本文編號：2209371
本文鏈接：http://sikaile.net/kejilunwen/wulilw/2209371.html
[Abstract]:Drilling will change the acoustic properties of rocks near the wellbore. In order to study the radial detection characteristics of longitudinal waves, the thickness of the transition zone is investigated in detail by using the radial columnar stratification model and the two-dimensional axisymmetric finite difference method. The characteristics of the response of monopole logging with the variation of source frequency and receiver distance are studied. The measured changes of sound velocity under different conditions are studied by using slow-time correlation method. Finally, based on the ray theory, the first wave arrival characteristics under different conditions are analyzed. Based on the model of increasing formation velocity, it is shown that the radial detection characteristics of P-wave are greatly affected by source distance, and the tomography of longitudinal wave velocities near well wall can be realized by the combination of different homologous distance signals.
【作者單位】： 中國科學(xué)院聲學(xué)研究所聲場與聲信息國家重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);北京市海洋深部鉆探測量工程技術(shù)研究中心;
【基金】：國家自然科學(xué)基金項(xiàng)目(11374322,11574347)
【分類號】：O429
【相似文獻(xiàn)】
相關(guān)期刊論文 前1條
1 笪天錫;超聲在測試物體內(nèi)平自由表面上反射特異現(xiàn)象的研究[J];重慶大學(xué)學(xué)報(bào)(自然科學(xué)版);1983年02期
，本文編號：2209371
本文鏈接：http://sikaile.net/kejilunwen/wulilw/2209371.html
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