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1. 发明授权

US06344746B1 Method for processing the lapse measurements 失效
标题翻译：处理流逝测量的方法
公开(公告)号：US06344746B1
公开(公告)日：2002-02-05
申请号：US09454690
申请日：1999-12-03
申请人： Raghu K. Chunduru , Alberto G. Mezzatesta , Rainer Busch
发明人： Raghu K. Chunduru , Alberto G. Mezzatesta , Rainer Busch
IPC分类号： G01V318
CPC分类号： G01V11/00
摘要： Resistivity data acquired at two different epochs using different types of tools are jointly inverted. For example, a multiple propagation resistivity (MPR) tool is run first, preferably at several frequencies and several transmitter-receiver spacings. At a later epoch, an induction tool may be run, preferably on a wireline. The joint inversion process identifies bed boundaries based on inflection points in the propagation resistivity and induction logging raw data. An initial guess for an uninvaded earth model is generated using the selected bed boundaries and the apparent raw resistivity values. An inversion run using shallow measurements of propagation resistivity logging data is performed to estimate a resistivity structure representative of the near borehole zone resistivity (invaded zone). The bed boundary positions of the layers are also updated as part of the inversion process. Synthetic data for both the shallow and deep measurements are generated to delineate the invasion zones. If the data match is good for both shallow and deep subarrays, then the model obtained from the shallow data is used as the final model for the inversion. In the event the data match is good for short subarrays and not for long subarrays, a final inversion run is performed by introducing invasion in the earth model. The method may be used for inverting data obtained from wireline, MWD or permanently implanted sensors at two or more epochs.
摘要翻译：使用不同类型工具在两个不同时期获取的电阻率数据被共同反转。例如，首先运行多传播电阻率（MPR）工具，优选地在几个频率和几个发射器 - 接收器间隔处运行。在稍后的时代，可以运行感应工具，优选在有线上运行。联合反演过程基于传播电阻率和感应测井原始数据中的拐点识别床边界。使用选定的床边界和表观原始电阻率值产生无侵蚀地球模型的初始猜测。进行使用传播电阻率测井数据的浅测量的反演运行，以估计代表近钻孔区电阻率（入侵区）的电阻率结构。层的床边界位置也作为反演过程的一部分被更新。产生浅和深测量的合成数据，以描绘入侵区。如果数据匹配对浅层和深层子阵列都有好处，则从浅层数据获得的模型被用作反演的最终模型。如果数据匹配对于短的子阵列而言不利于长的子阵列，则通过在地球模型中引入入侵来执行最终的反演运行。该方法可以用于在两个或更多个时期反转从有线，MWD或永久植入的传感器获得的数据。

2. 发明授权

US5784333A Method for estimating permeability of earth formations by processing stoneley waves from an acoustic wellbore logging instrument 失效
标题翻译：通过加工来自声井测井仪的石英波来估算地层的渗透率的方法
公开(公告)号：US5784333A
公开(公告)日：1998-07-21
申请号：US861263
申请日：1997-05-21
申请人： Xiaoming Tang , Stephan Gelinsky , Raghu K. Chunduru , Arthur C. H. Cheng
发明人： Xiaoming Tang , Stephan Gelinsky , Raghu K. Chunduru , Arthur C. H. Cheng
IPC分类号： G01V1/50 , G01V1/40 , E21B49/00
CPC分类号： G01V1/50
摘要： A method for determining the permeability of earth formations penetrated by a wellbore from acoustic signals measured by an acoustic wellbore logging instrument. The method includes separating components from the measured acoustic signals which represent Stoneley waves propagating through the earth formations. Signals representing Stoneley waves propagating through the same earth formations are synthesized. The separated acoustic signal components and the synthesized Stoneley wave signals are compared. The permeability is determined from differences between the synthesized Stoneley wave signals and the separated acoustic signal components. In a preferred embodiment, the step of calculating the permeability includes inversion processing a wave center frequency shift and a wave travel time delay with respect to the permeability of the earth formations.
摘要翻译：一种通过声井测井仪测量的声信号来确定井眼渗透的地层的渗透率的方法。该方法包括从表示通过地层形成的斯通利波的测量声信号中分离成分。代表通过相同地层传播的斯通利波的信号被合成。比较分离的声信号分量和合成的斯通利波信号。磁导率由合成的斯通利波斯信号与分离的声信号分量之间的差异确定。在优选实施例中，计算磁导率的步骤包括相对于地层的磁导率的波中心频率偏移和波浪时间延迟的反演处理。

3. 发明授权

US5712829A Method for determining earth formation shear wave anisotropy parameters by inversion processing of signals from a multiple-component dipole array acoustic well logging instrument 失效
标题翻译：通过对来自多组分偶极阵列声测井仪器的信号的反演处理确定地层剪切波各向异性参数的方法
公开(公告)号：US5712829A
公开(公告)日：1998-01-27
申请号：US696668
申请日：1996-08-14
申请人： Xiaoming Tang , Raghu K. Chunduru
发明人： Xiaoming Tang , Raghu K. Chunduru
IPC分类号： G01V1/44 , G01V1/52 , G01V1/40 , G01V1/28
CPC分类号： G01V1/52 , G01V1/44
摘要： A method for determining orientations and velocities of slow and fast waves in an anisotropic earth formation. Signals are used from an acoustic logging tool including dipole transmitters and receiver arrays. An initial value of angle subtended between orientation of the fast wave and one of the transmitters is selected. A waveform of a fast principal wave and slow principal wave at first and second selected receiver positions are calculated from received signals at each of these positions and the selected subtended angle. A derivative waveform with respect to subtended angle is calculated for both fast and slow principal waves. An initial velocity of slow waves is selected and the calculated waveforms of the slow principal wave and its derivative waveform at the first position are time shifted by a time corresponding to distance between first and second receiver positions and the selected value of velocity. A value of difference in velocity between slow waves and fast waves is selected, and the time-shifted slow principal wave and its derivative waveform are adjusted by a time corresponding to the value of difference in velocities. Differences between the time-adjusted wave and its derivative waveform are determined between the calculated fast principal wave and its derivative waveform calculated at that receiver position. The value of velocity, value of difference in velocity and subtended angle are adjusted and calculating waveforms and derivative waveforms, time shifting and time adjusting are repeated until the difference between waveforms reaches a minimum.
摘要翻译：一种用于确定各向异性地层中慢波和快波的方向和速度的方法。信号用于包括偶极发射器和接收器阵列的声学测井工具。选择快速波的方向与发射机之一对准的初始角度值。在这些位置和所选择的对置角度的接收信号中计算第一和第二选择的接收机位置处的快速主波和慢主波形的波形。针对快速和慢速主波计算相对于对角的导数波形。选择慢波的初始速度，并且将第一位置处的慢主波及其导数波形的计算波形时间移位一个对应于第一和第二接收器位置之间的距离和所选择的速度值的时间。选择慢波和快波之间的速度差值，并将时移慢主波及其导数波形调整到与速度差值相对应的时间。在计算的快速主波及其在该接收机位置处计算的导数波形之间确定时间调整波及其导数波形之间的差异。调整速度值，速度和对角度差值，并重复计算波形和导数波形，时移和时间调整，直到波形之间的差值达到最小值。

4. 发明授权

US5740124A Method for determining acoustic velocity of earth formations by simulating receiver waveforms for an acoustic array well logging instrument 失效
标题翻译：通过模拟声阵列测井仪器的接收器波形来确定地层声速的方法
公开(公告)号：US5740124A
公开(公告)日：1998-04-14
申请号：US752327
申请日：1996-11-19
申请人： Raghu K. Chunduru , Xiaoming Tang
发明人： Raghu K. Chunduru , Xiaoming Tang
IPC分类号： G01V1/46 , G01V1/40 , G01V1/36
CPC分类号： G01V1/46
摘要： A method of determining the acoustic propagation velocities of earth formations using signals generated by an acoustic array well logging instrument. The method includes generating a model of the acoustic velocities including a value of velocity for each propagation mode for which the velocity is to be determined Acoustic waveforms are synthesized for a plurality of receiver locations on the acoustic logging instrument by using the values of the acoustic velocities in the model. A difference is determined between the synthesized waveforms and measured waveforms generated by acoustic energy detected at corresponding receiver locations on the acoustic logging instrument. The model is adjusted and the waveforms are resynthesized until the difference is determined to be at a minimum. The step of adjusting the model is performed by very fast simulated annealing.
摘要翻译：使用由声阵列测井仪产生的信号来确定地球地层声传播速度的方法。该方法包括生成声速模型，其包括要为其确定速度的每个传播模式的速度值。通过使用声速的值，在声学测井仪器上为多个接收器位置合成声波形在模型中。在声波测井仪器上的相应接收器位置处检测到的声能产生的合成波形和测量波形之间确定差异。调整模型，并重新合成波形，直到将该差值确定为最小值。通过非常快速的模拟退火进行调整模型的步骤。

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