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    • 1. 发明申请
    • METHOD AND SYSTEM FOR GENERATING A BEAM OF ACOUSTIC ENERGY FROM A BOREHOLE, AND APPLICATIONS THEREOF
    • 用于从井眼产生声波能量的方法和系统及其应用
    • WO2009152416A3
    • 2010-02-25
    • PCT/US2009047184
    • 2009-06-12
    • CHEVRON USA INCJOHNSON PAUL AGUYER ROBERTLE BAS PIERRE-YVESVU CUNGNIHEI KURTSCHMITT DENIS PSKELT CHRISTOPHER
    • JOHNSON PAUL AGUYER ROBERTLE BAS PIERRE-YVESVU CUNGNIHEI KURTSCHMITT DENIS PSKELT CHRISTOPHER
    • G01V1/46
    • G01V1/46
    • A compact array of transducers (110, 120) is employed as a downhole instrument for acoustic investigation of the surrounding rock formation. The array is operable to generate simultaneously a first acoustic beam signal (110) at a first frequency and a second acoustic beam signal (120) at a second frequency different than the first frequency. These two signals can be oriented through an azimuthal rotation of the array and an inclination rotation using control of the relative phases of the signals from the transmitter elements or electro-mechanical linkage. Due to the non-linearity of the formation (140), the first and the second acoustic beam signal (110, 120) mix into the rock formation where they combine into a collimated third signal (150) that propagates in the formation along the same direction than the first and second signals and has a frequency equal to the difference of the first and the second acoustic signals. The third signal is received either within the same borehole, after reflection, or another borehole, after transmission, and analyzed to determine information about rock formation.
    • 传感器(110,120)的小型阵列被用作用于周围岩层的声学研究的井下仪器。 阵列可操作以同时产生第一频率的第一声波束信号(110)和以不同于第一频率的第二频率的第二声束信号(120)。 这两个信号可以通过阵列的方位旋转和通过控制来自发射器元件或机电连杆的信号的相对相位的倾斜旋转来定向。 由于地层(140)的非线性,第一和第二声波束信号(110,120)混合到岩层中,在那里它们组合成准直的第三信号(150),其沿着相同的方向在地层中传播 方向比第一和第二信号,并且具有等于第一和第二声信号的差的频率。 第三个信号在相同的钻孔,反射后或另一个钻孔中,在传输之后被接收并且被分析以确定关于岩层的信息。
    • 4. 发明申请
    • SYSTEM AND METHOD FOR GENERATING MICRO-SEISMIC EVENTS AND CHARACTERIZING PROPERTIES OF A MEDIUM WITH NON-LINEAR ACOUSTIC INTERACTIONS
    • 用于生成微地震事件的系统和方法以及具有非线性声学相互作用的介质的特性
    • WO2012064842A3
    • 2013-06-13
    • PCT/US2011059973
    • 2011-11-09
    • CHEVRON USA INCLOS ALAMOS NAT SECURITY LLCVU CUNG KHACNIHEI KURT TJOHNSON PAUL AGUYER ROBERT ATEN CATE JAMES ALE BAS PIERRE-YVESLARMAT CARENE S
    • VU CUNG KHACNIHEI KURT TJOHNSON PAUL AGUYER ROBERT ATEN CATE JAMES ALE BAS PIERRE-YVESLARMAT CARENE S
    • G01V1/46G01V1/00
    • G01V1/006G01V1/44G01V1/46G01V1/50G01V1/52G01V2210/125G01V2210/127G01V2210/588G10K15/02
    • A method and system for generating a micro-seismic event in a medium from a non-linear interaction to characterize the medium is provided. The method includes generating, by a first acoustic source (SI, 12), a first coded acoustic signal comprising a first plurality of pulses arranged as a time sequence, each pulse comprising a modulated signal at a central frequency; and generating, by a second acoustic source (S2,14), a second coded acoustic signal comprising a second plurality of pulses arranged as a time sequence, wherein each pulse comprises a modulated signal and a central frequency of the modulated signal within each pulse in the second plurality of pulses is a selected fraction d of the central frequency of the modulated signal for the corresponding pulse in the first plurality of pulses. The method further includes receiving, by a receiver (R), a detected signal including a third signal being generated by a non-linear mixing process from the first acoustic signal and the second acoustic signal in the mixing zone; performing, by a processor, data processing on the received signal, or correlating with a coded signal template, or both, to extract the third signal generated by the non-linear mixing process over noise or over signals generated by a linear interaction process, or both, to obtain an emulated micro-seismic event signal occurring at the mixing zone; and characterizing properties of the medium or creating a 3D image of the properties of the medium, or both, based on the emulated micro-seismic event signal.
    • 提供了一种用于从非线性相互作用产生介质中的微地震事件以表征介质的方法和系统。 该方法包括通过第一声源(SI,12)产生包括排列成时间序列的第一多个脉冲的第一编码声信号,每个脉冲包括中心频率的调制信号; 以及通过第二声源(S2,14)产生包括排列为时间序列的第二多个脉冲的第二编码声信号,其中每个脉冲包括调制信号和在每个脉冲内的调制信号的中心频率 所述第二多个脉冲是所述第一多个脉冲中相应脉冲的调制信号的中心频率的选定分数d。 该方法还包括由接收器(R)接收包括由混合区中的第一声信号和第二声信号通过非线性混合处理产生的第三信号的检测信号; 通过处理器对接收到的信号执行数据处理或与编码信号模板或两者相关,以通过由线性相互作用过程产生的噪声或过度信号来提取由非线性混合处理产生的第三信号,或 以获得在混合区发生的模拟微地震事件信号; 并且基于仿真的微地震事件信号来表征介质的性质或者创建介质的属性的3D图像,或两者。