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61. 发明专利

CA2579982A1 ANISOTROPY MEASUREMENT WHILE DRILLING 未知
公开(公告)号：CA2579982A1
公开(公告)日：2007-09-06
申请号：CA2579982
申请日：2007-02-28
申请人： SCHLUMBERGER CA LTD
发明人： SINHA BIKASH K , HSU CHAUR-JIAN , PABON JAHIR
IPC分类号： G01V1/50 , E21B47/12 , E21B47/14
摘要： Methods and apparatus facilitating measurement of anisotropy are disclosed . According to some aspects, anisotropy can be determined while drilling. Monopole/quadrupole interactions, as well as monitoring dipole excitations a nd other methods, may be used to find the principal shear directions of a formation while drilling or during wireline or other operations.

62. 发明专利

CA2542531A1 STONELEY RADIAL PROFILING OF FORMATION SHEAR SLOWNESS 未知
公开(公告)号：CA2542531A1
公开(公告)日：2006-11-10
申请号：CA2542531
申请日：2006-04-10
申请人： SCHLUMBERGER CA LTD
发明人： PABON JAHIR , SINHA BIKASH K , YAMAMOTO MARE
IPC分类号： G01V1/40 , G01V1/50
摘要： Methods and apparatus facilitating radial profiling of shear slowness or she ar modulus c66 in the cross-sectional plane of a borehole in an anisotropic formation with the vertical X3-axis are disclosed. According to some aspects of the invention, sonic tool bias is accounted for and removed from radial profiles. According to some aspects, sonic tool bias is accounted fox by modeling the sonic tool as a heavy- fluid.

63. 发明专利

CA2438732A1 ACTIVE REDUCTION OF TOOL BORNE NOISE IN A SONIC LOGGING TOOL 未知
公开(公告)号：CA2438732A1
公开(公告)日：2004-02-26
申请号：CA2438732
申请日：2003-08-25
申请人： SCHLUMBERGER CA LTD
发明人： PABON JAHIR
IPC分类号： G01V1/52 , G10K11/178 , G01V1/44 , G01V1/48
摘要： A sonic logging tool that can be positioned within a fluid-filled borehole includes an axially distributed active vibration control system to reduce tool borne noise. The tool includes an acoustic transmitter, an axial array of acoustic receivers, and actuator assemblies that are coupled to cancel tool mode vibrations at stations along the receiv er section of the tool. In a preferred embodiment, force is applied in feedback mode based on tool mode vibrations sensed at each station. The force at each station is applied by a real-time computational algorithm using feedback. The feedback includes weighting to accommodate monopole or dipole tool mode vibration. The computational algorithm includes FIR processing of signals received from a vibration sensor assembly. The force applied at a given station is a function of tool mode vibration measured at that station and th e predetermined values of a set of FIR filter coefficients associated with the given station . The predetermined FIR filter coefficients are determined by an iterative optimization techniqu e. Alternatively, the force at each station may be applied using feed-forward.

64. 发明专利

CA2429182A1 SONIC LOGGING TOOL INCLUDING RECEIVER AND SPACER STRUCTURE 未知
公开(公告)号：CA2429182A1
公开(公告)日：2002-05-23
申请号：CA2429182
申请日：2000-11-16
申请人： SCHLUMBERGER CA LTD
发明人： SUGIYAMA HITOSHI , PABON JAHIR , TASHIRO HITOSHI , OTSUKA AKIRA , HOYLE DAVID
IPC分类号： G01V1/52
摘要： A formation logging tool having a substantially continuous central mandrel with regularly spaced mass blocks disposed thereon, at least some of the mas s blocks carrying sensors such as receivers. By adopting this structure, the tool can be made to behave as a mass-spring structure and its flexural and extensional behaviour controlled such that its dispersion curve does not extend into the dispersion curve of the formation to be logged. The structur e can be applied to the whole of the logging tool or just to the receiver section and/or any spacer section between the receiver and the transmitter section.

65. 发明专利

GB2487151B Drill bits and methods of drilling curved boreholes 未知
公开(公告)号：GB2487151B
公开(公告)日：2013-10-30
申请号：GB201205958
申请日：2010-09-08
申请人： SCHLUMBERGER HOLDINGS
发明人： PAFITIS DEMOSTHENIS , PABON JAHIR , SIHLER JOACHIM
IPC分类号： E21B7/06 , E21B10/42 , E21B10/62
摘要： The invention provides drill bits and methods of drilling curved boreholes. One aspect of the invention provides a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths. Another aspect of the invention provides a method for drilling a curved borehole. The method includes: providing a drill string including a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths; rotating the drill string; and selectively actuating the one or more blades to a plurality of cut depths; thereby drilling a curved borehole.

66. 发明专利

GB2429289B Methods for processing dispersive acoustic waveforms 未知
公开(公告)号：GB2429289B
公开(公告)日：2008-09-03
申请号：GB0623555
申请日：2005-05-12
申请人： SCHLUMBERGER HOLDINGS
发明人： SAIKI YOSHIYUKI , SKELTON OLIVER , PABON JAHIR , SINHA BIKASH K
IPC分类号： G01V1/48 , G01V1/28 , G01V1/36
摘要： A method for processing acoustic data comprising applying a dynamic filter band. The method and apparatus may be particularly adapted to processing sonic data to measure formation slowness in a borehole.

67. 发明专利

GB2429289A Methods for processing dispersive acoustic waveforms 未知
公开(公告)号：GB2429289A
公开(公告)日：2007-02-21
申请号：GB0623555
申请日：2005-05-12
申请人： SCHLUMBERGER HOLDINGS
发明人： SAIKI YOSHIYUKI , SKELTON OLIVER , PABON JAHIR , SINHA BIKASH K
IPC分类号： G01V1/48 , G01V1/28 , G01V1/36
摘要： A method for processing acoustic data comprising applying a dynamic filter band. The method and apparatus may be particularly adapted to processing sonic data to measure formation slowness in a borehole.

68. 发明专利

GB2426052A Method for estimating the horizontal shear modulus of a formation while taking into account the presence of an acoustic tool in the borehole. 未知
公开(公告)号：GB2426052A
公开(公告)日：2006-11-15
申请号：GB0606938
申请日：2006-04-06
申请人： SCHLUMBERGER HOLDINGS
发明人： SINHA BIKASH K , PABON JAHIR , YAMAMOTO MARE
IPC分类号： G01V1/50
摘要： Methods and apparatus facilitating radial profiling of shear slowness or shear modulus c66 in the cross-sectional plane of a borehole in an anisotropic formation with the vertical X3-axis are disclosed. According to some aspects of the invention, sonic tool bias is accounted for and removed from radial profiles. According to some aspects, sonic tool bias is accounted for by modeling the sonic tool as a heavy-fluid.

69. 发明专利

GB2421079A Acoustic waveform processing using dispersion curves based on a borehole-formation model having a set of borehole-formation parameters 未知
公开(公告)号：GB2421079A
公开(公告)日：2006-06-14
申请号：GB0523882
申请日：2005-11-24
申请人： SCHLUMBERGER HOLDINGS
发明人： WU PETER T , PABON JAHIR
IPC分类号： G01V1/48
摘要： A method of processing waveforms (e.g. dispersive waveforms from a monopole Stonley mode, dipole, quadrupole or higher order mode) includes: (a) transforming at least a portion of the waveforms to produce frequency domain signals 223; (b) obtaining a model dispersion curve 225 based on a borehole-formation model 226 having a set of borehole-formation parameters (e.g. shear slowness, compressional slowness, mud slowness, formation density, mud density, borehole diameter, signal time support window, signal frequency range); (c) adjusting phases of the frequency domain signals according to the model dispersion curve to produce back-propagated signals 224; (d) computing coherence of the back propagated signals 228; (e) repeating steps (b) to (d) varying values of the set of borehole-formation parameters until the coherence reaches a selected criterion; and (f) outputting 240 at least a portion of the set of borehole-formation parameters (e.g. formation shear slowness). Also disclosed is a method of determining formation anisotropy by determining elastic shear constants from acoustic waveforms corresponding to the monopole Stoneley mode and the dipole or quadrupole mode.

70. 发明专利

GB2381847B Structures and methods for damping tool waves particularly for acoustic logging tools 未知
公开(公告)号：GB2381847B
公开(公告)日：2003-12-24
申请号：GB0224621
申请日：2002-10-23
申请人： SCHLUMBERGER HOLDINGS
发明人： HSU CHAUR-JIAN , PABON JAHIR , JOYCE RICHARD D , D ANGELO RALPH M , ARON JEFFREY B , CAMPANAC PIERRE , REID LENNOX , STRAUB H CHARLES , ESMERSOY CENGIZ , GRIGOR DARRYL
IPC分类号： G01V1/52
摘要： In one aspect, the invention involves an acoustic logging tool for performing acoustic investigations of subsurface geological formations. In one embodiment, the tool comprises a generally longitudinally extending tool body adapted for positioning in a borehole. At least one transmitter is mounted on the tool body to emit acoustic energy. At least one receiver is also mounted on the tool body at a location axially displaced from the at least one transmitter. The receiver is adapted to receive acoustic energy. An attenuator is also positioned along the body and includes at least one cavity having a plurality of particles disposed therein. The attenuator as disclosed herein may be applied to other logging tools for protecting tool components and enhancing measurement quality. Methods for attenuating acoustic energy transmitted through the body of an acoustic logging tool or other logging tools are also disclosed.

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