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1.发明申请公开(公告)号：US20110242936A1
公开(公告)日：2011-10-06
申请号：US12752122
申请日：2010-04-01
IPC分类号： G01V1/48
CPC分类号： G01V1/50
摘要： Methods and apparatus to identify layer boundaries in subterranean formations are described. An example method of identifying a layer boundary of a subterranean formation includes transmitting an acoustic signal from a transmitter into a borehole of the subterranean formation and receiving the acoustic signal at a receiver coupled to the downhole tool and spaced from the transmitter. Additionally, the example method includes logging an energy value associated with the acoustic signal received by the receiver as the downhole tool is moved in the borehole and identifying a change in the logged energy value associated with an impedance change in the subterranean formation to identify the layer boundary.
摘要翻译： 描述了确定地层中层间边界的方法和装置。 识别地层的层边界的示例性方法包括将声信号从发射机传输到地下井的井眼中，并在耦合到井下工具并与发射器间隔开的接收器处接收声信号。 此外，示例性方法包括：当井下工具在钻孔中移动时，记录与接收器接收的声信号相关联的能量值，并且识别与地下地层中的阻抗变化相关联的记录能量值的变化，以识别层 边界。
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公开(公告)号：US20120298421A1
公开(公告)日：2012-11-29
申请号：US13115988
申请日：2011-05-26
申请人： RICHARD T. COATES , BENOIT FROELICH , ERIC LAVRUIT
发明人： RICHARD T. COATES , BENOIT FROELICH , ERIC LAVRUIT
IPC分类号： E21B47/00
CPC分类号： E21B47/182 , E21B47/101
摘要： An influx of gas into a borehole can be detected by deploying a string of acoustic sensors along a drill string or other conduit to monitor an acoustic characteristic, such as velocity or attenuation, of the drilling fluid present in the borehole. In response to detection of acoustic pulses propagating in the drilling fluid, the acoustic sensors generate signals that are representative of acoustic characteristics if the drilling fluid. Based on the generated signals, a data acquisition system can determine whether a change in the monitored acoustic characteristic is indicative of a gas influx.
摘要翻译： 可以通过沿着钻柱或其他导管部署一串声学传感器来监测气体涌入钻孔中以监测钻孔中存在的钻井液体的声学特性，例如速度或衰减。 响应于在钻井液中传播的声脉冲的检测，声传感器产生代表声学特性的信号，如果钻井液。 基于生成的信号，数据采集系统可以确定监测的声学特性的变化是否表示气体涌入。
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