公开(公告)号：US06703606B2

公开(公告)日：2004-03-09

申请号：US09929680

申请日：2001-08-14

申请人： Robert A. Adolph

发明人： Robert A. Adolph

IPC分类号： G01V510

CPC分类号： G01V5/107 ,  G01V5/104

摘要： A method is disclosed for measuring neutron interaction properties of an earth formation. The method includes irradiating the formation with bursts of high energy neutrons. The bursts have a duration selected to enable detection of short duration burst related phenomena. After at least one of the bursts, short duration burst related phenomena are measured. After a selected number of the bursts, long duration neutron burst-related phenomena are detected. In some embodiments, the short duration burst related phenomena include at least one of inelastic gamma ray related phenomena, neutron slowing down related phenomena and short capture cross section related phenomena.

摘要翻译： 公开了一种用于测量地层的中子相互作用特性的方法。 该方法包括用高能中子的脉冲辐射地层。 脉冲串具有选择的持续时间以便能够检测短时间脉冲串相关现象。 在至少一个脉冲串之后，测量短时间脉冲串相关现象。 在选定数量的脉冲串之后，检测到长时间中子爆发相关现象。 在一些实施例中，短持续时间脉冲串相关现象包括非弹性γ射线相关现象，中子减慢相关现象和短捕获截面相关现象中的至少一个。

公开(公告)号：US06552333B1

公开(公告)日：2003-04-22

申请号：US09639556

申请日：2000-08-16

申请人： Bruce H. Storm ,  Larry L. Gadeken ,  Ward E. Shultz

发明人： Bruce H. Storm ,  Larry L. Gadeken ,  Ward E. Shultz

IPC分类号： G01V510

CPC分类号： G01V5/12

摘要： Apparatus and method for determining the integrity or quality of a gravel pack positioned between the casing and gravel pack screen of a subterranean borehole, with the method including azimuthally scanning the gravel pack for radiation, with detection of the radiation limited to a limited angular arc of the gravel pack at any one time, with the apparatus including shielded or collimated radiation source and/or detector.

公开(公告)号：US06285026B1

公开(公告)日：2001-09-04

申请号：US09281403

申请日：1999-03-30

申请人： Michael L. Evans ,  David L. Best

发明人： Michael L. Evans ,  David L. Best

IPC分类号： G01V510

CPC分类号： E21B47/082

摘要： A system for measuring the size of a borehole penetrating an earth formation is disclosed. The system uses a neutron source and a least one neutron detector. The neutron detector responds primarily to the composite hydrogen content of material within the borehole and formation upon irradiation by the neutron source. A partition response function is used to delineate the portion of the detector response resulting from borehole and from the formation. Since the detector response from the borehole can be isolated using the partition function and the hydrogen content of the borehole fluid is generally known, the size of the borehole can be determined from borehole response portion of the composite detector response if combined with a neutron porosity measurement of the formation. The neutron porosity measurement can be obtained independently, or by combining the neutron detector response with the response of a second neutron detector at a different axial spacing from the neutron source. The system is applicable in both logging-while-drilling and wireline logging operations.

摘要翻译： 公开了一种用于测量穿透地层的钻孔尺寸的系统。 该系统使用中子源和至少一个中子探测器。 中子检测器主要响应于钻孔内的材料的复合氢含量和中子源照射时的形成。 分区响应函数用于描绘由井眼和地层产生的检测器响应的部分。 由于来自钻孔的检测器响应可以使用分隔功能隔离，并且钻孔流体的氢含量通常是已知的，所以如果与中子孔隙度测量结合，可以从复合探测器响应的钻孔响应部分确定钻孔的尺寸 的形成。 可以独立地获得中子孔隙度测量，或通过将中子探测器响应与第二个中子探测器在与中子源不同的轴向间距上的响应相结合来获得。 该系统适用于钻井日志和有线日志记录操作。

公开(公告)号：US06815665B2

公开(公告)日：2004-11-09

申请号：US10419554

申请日：2003-04-21

申请人： Bruce H. Storm ,  Larry L. Gadeken ,  Ward E. Shultz

发明人： Bruce H. Storm ,  Larry L. Gadeken ,  Ward E. Shultz

IPC分类号： G01V510

CPC分类号： G01V5/12

摘要： Apparatus and method for determining the integrity or quality of a gravel pack positioned between the casing and gravel pack screen of a subterranean borehole, with the method including azimuthally scanning the gravel pack for radiation, with detection of the radiation limited to a limited angular arc of the gravel pack at any one time, with the apparatus including shielded or collimated radiation source and/or detector.

摘要翻译： 用于确定位于地下钻孔的套管和砾石包装屏幕之间的砾石包装的完整性或质量的装置和方法，其中所述方法包括方位扫描用于辐射的砾石包，同时检测到限于有限角弧的 砾石包装在任何一个时间，该设备包括屏蔽或准直的辐射源和/或检测器。

公开(公告)号：US06747270B2

公开(公告)日：2004-06-08

申请号：US09950951

申请日：2001-09-12

申请人： Charles Alexander Pereira ,  James Roger Samworth

发明人： Charles Alexander Pereira ,  James Roger Samworth

IPC分类号： G01V510

CPC分类号： G01V5/125 ,  G01V5/104

摘要： A method, of logging a borehole, for use in a cased oil well for detecting the gas/oil or water/oil contact in a hydrocarbon reservoir, using a neutron capture technique to detect one or more properties of fluid includes comparing the count rates from two or more radiation detectors spaced at respective first and second distances from an isotopic source of continuous neutron radiation. The contact detection criteria are arranged to be substantially independent of borehole fluid characteristics. Apparatus (10) for carrying out the method includes a logging tool (10) having an isotopic source (16) and two spaced detectors (17,18).

摘要翻译： 一种记录钻孔的方法，用于套管油井中，用于检测油气藏中的气/油或水/油接触，使用中子捕获技术检测流体的一种或多种性质，包括将来自 两个或更多个辐射检测器，在与连续中子辐射的同位素源相距的第一和第二距离处间隔开。 接触检测标准被布置为基本上独立于钻孔流体特性。用于执行该方法的装置（10）包括具有同位素源（16）和两个间隔开的检测器（17,18）的测井工具（10）。

公开(公告)号：US06639210B2

公开(公告)日：2003-10-28

申请号：US09805798

申请日：2001-03-14

申请人： Richard C. Odom ,  Donald E. Tiller ,  Robert D. Wilson

发明人： Richard C. Odom ,  Donald E. Tiller ,  Robert D. Wilson

IPC分类号： G01V510

CPC分类号： G01T3/06

摘要： An improved fast neutron detector fabricated with alternating layers of hydrogenous, optically transparent, non scintillating material and scintillating material. Fast neutrons interact with the hydrogenous material generating recoil protons. The recoil protons enter the scintillating material resulting in scintillations. The detector is optically coupled to a photomultiplier tube which generates electrical pulses proportional in amplitude to the intensity of the scintillations, and therefore are an indication of the energy of the fast neutrons impinging upon the detector. Alternating layers of materials are dimensioned to optimize total efficiency of the detector, or to optimize the spectroscopy efficiency of the detector. The scintillating material is preferably ZnS, and the hydrogenous material is preferably plastic. The detector is ideally suited for well logging applications and fast neutron monitor applications.

公开(公告)号：US06825459B2

公开(公告)日：2004-11-30

申请号：US09949596

申请日：2001-09-10

申请人： Ronald E. Bothner

发明人： Ronald E. Bothner

IPC分类号： G01V510

CPC分类号： G01V5/125

摘要： A well logging tool has a neutron source for irradiating formation surrounding a borehole. Two detectors are mounted in a spaced-apart vertical relationship within the tool pressure-resistant housing. Each detector detects capture gamma radiation across the entire gamma ray energy spectrum, windows are set in this spectrum to separate two distinct energy ranges, thereby generating a total of four independent sets of signals, two for each detector. One set of signals is indicative of the hydrogen content and insensitive to the chlorine content of the irradiated formation. The second set of signals is indicative of the hydrogen plus the chlorine content of the irradiated formation. By comparing the sets of signals in two proportional energy ranges, the logging tool allows to generate a log that helps determine the presence or absence of hydrocarbon or salt water in the formation.

摘要翻译： 测井工具具有用于照射钻孔周围的地层的中子源。 两个检测器以工具耐压壳体内的间隔开的垂直关系安装。 每个检测器检测整个伽马射线能谱的捕获伽马辐射，在该光谱中设置窗口以分离两个不同的能量范围，从而产生总共四个独立的信号组，每个检测器两个。 一组信号指示氢含量并且对被照射的地层的氯含量不敏感。 第二组信号指示氢气加照射的地层的氯含量。 通过比较两个比例能量范围的信号组，测井工具允许产生有助于确定地层中碳氢化合物或盐水的存在或不存在的对数。

公开(公告)号：US06738720B2

公开(公告)日：2004-05-18

申请号：US09997134

申请日：2001-11-29

申请人： Richard C. Odom ,  Robert D. Wilson

发明人： Richard C. Odom ,  Robert D. Wilson

IPC分类号： G01V510

CPC分类号： G01N9/24

摘要： A system for measuring density of material which can be embodied to measuring bulk density of material penetrated by a borehole. The probe component of the system comprises a source of neutron radiation and preferably two gamma ray spectrometers. The neutron source induces gamma radiation with energies up to about 10 MeV within the material being measured. Formation bulk density is determined by combining spectra of the induced gamma radiation with preferably two gamma ray spectrometers at differing axial spacings from the source. The high energy and dispersed nature of the induced gamma radiation yields greater radial depth of investigation than that obtainable with prior art backscatter density systems, which typically use gamma ray sources local to a probe and of energy about 1.3 MeV or less. The system can alternately be embodied to measure other material properties and to measure density of materials not penetrated by a borehole.

摘要翻译： 一种用于测量材料密度的系统，其可以体现为测量钻孔渗透的材料的堆积密度。 该系统的探针部件包括中子辐射源，优选两个伽马射线光谱仪。 在测量的材料中，中子源引发能量高达约10MeV的γ辐射。 通过将诱导的γ辐射与来自源的不同轴向间隔的优选两个伽马射线光谱仪的光谱组合来确定形成堆积密度。 诱导伽马辐射的高能量和分散性质比现有技术的反向散射密度系统可获得更大的径向深度，其通常使用探针局部的伽马射线源和约1.3MeV或更小的能量。 该系统可以替代地体现为测量其他材料性质并测量未被钻孔渗透的材料的密度。

公开(公告)号：US06207953B1

公开(公告)日：2001-03-27

申请号：US09066729

申请日：1998-04-24

申请人： Robert D. Wilson

发明人： Robert D. Wilson

IPC分类号： G01V510

CPC分类号： G01V5/104

摘要： Methods and apparatus are disclosed for determining gas saturation, liquid saturation, porosity and density of earth formations penetrated by a well borehole. Determinations are made from measures of fast neutron and inelastic scatter gamma radiation induced by a pulsed, fast neutron source. The system preferably uses two detectors axially spaced from the neutron source. One detector is preferably a scintillation detector responsive to gamma radiation, and a second detector is preferably an organic scintillator responsive to both neutron and gamma radiation. The system can be operated in cased boreholes which are filled with either gas or liquid. Techniques for correcting all measurements for borehole conditions are disclosed.

摘要翻译： 公开了用于确定井眼穿透的地层的气体饱和度，液体饱和度，孔隙率和密度的方法和装置。 测定由脉冲快中子源引起的快中子和非弹性散射γ辐射的测量。 该系统优选地使用与中子源轴向间隔开的两个检测器。 一个检测器优选地是响应于γ辐射的闪烁检测器，并且第二检测器优选地是响应于中子和γ辐射两者的有机闪烁体。 该系统可以在充满气体或液体的套管钻孔中操作。 公开了用于校正钻孔条件的所有测量的技术。