公开(公告)号：US6069477A

公开(公告)日：2000-05-30

申请号：US994497

申请日：1997-12-19

Applicant: Songhua Chen ,  Daniel T. Georgi

Inventor： Songhua Chen ,  Daniel T. Georgi

IPC: G01R33/44 ,  G01V3/32 ,  G01V3/00

CPC classification number: G01V3/32 ,  G01N24/081

Abstract: The total porosity of a subterranean formation is calculated by summing the effective Porosity and the clay bound water (CBW) porosity. With the invention described in this patent, the distortion effects of clay bound water (CBW) porosity on the measurement of total porosity is filtered out. The effects will be more significant in slialy sand where the CBW porosity component of total porosity is abundant. The correct NMR transverse relaxation time (T.sub.2) spectra distribution is essential to a determination of capillary bound fluid (BVI) partial porosity and the Spectral Bulk Volume Irreducible (SBVI) model. The same data correction concept can be applied to make a meaningful comparison of well logs or laboratory core NMR data that are obtained with different interecho time (TE) sampling periods.

Abstract translation: 通过将有效孔隙度和粘土结合水（CBW）孔隙度相加来计算地层的总孔隙率。 利用该专利中描述的发明，滤除粘土结合水（CBW）孔隙度对总孔隙度测量的变形效应。 这种效应在总孔隙度的CBW孔隙度分量丰富的泥沙中更为显着。 正确的NMR横向弛豫时间（T2）光谱分布对于确定毛细血管结合流体（BVI）部分孔隙度和光谱体积不可约（SBVI）模型是必不可少的。 可以应用相同的数据校正概念，以便对不同间隔时间（TE）采样周期获得的测井数据或实验室核心NMR数据进行有意义的比较。

公开(公告)号：US6060886A

公开(公告)日：2000-05-09

申请号：US7159

申请日：1998-01-14

Applicant: Leonty A. Tabarovsky ,  Antonio Fabris ,  Alberto G. Mezzatesta ,  Gregory B. Itskovich

Inventor： Leonty A. Tabarovsky ,  Antonio Fabris ,  Alberto G. Mezzatesta ,  Gregory B. Itskovich

IPC: G01V3/24 ,  G01V3/18

CPC classification number: G01V3/24

Abstract: An apparatus for determining radial distribution of resistivity of earth formations surrounding a wellbore. The apparatus includes a sonde mandrel having an insulating exterior surface and electrodes disposed on the insulating surface at spaced apart locations. The electrodes are connected to circuits for measuring a focused current resistivity within a predetermined longitudinal span. The electrodes are also connected to circuits for measuring electrical impedance between pairs of electrodes spaced apart at a plurality of different longitudinal spacings. The preferred embodiment includes a voltage measuring circuit interconnected between a pair of electrodes which is positioned between a closest spaced pair of electrodes connected to the impedance measuring circuits, so that a vertical resolution of the impedance measurements can be limited to approximately the axial spacing of the pair of electrodes connected to the voltage measuring circuit. A method according to the invention for determining the distribution of resistivity of earth formations surrounding a wellbore includes the steps of measuring a focused current resistivity of the earth formations to determine a composite resistivity of an uninvaded zone, an invaded zone and a flushed zone. Impedance is measured between pairs of electrodes, each pair having a different longitudinal spacing, and resistivity of the flushed zone and the invaded zone are determined from the measurements of impedance. The resistivity of the uninvaded zone can then be determined from the measurement of focused current resistivity.

Abstract translation: 一种用于确定井筒周围的地层的电阻率的径向分布的装置。 该设备包括具有绝缘外表面的探头心轴和在间隔开的位置处设置在绝缘表面上的电极。 电极连接到用于测量预定纵向跨度内的聚焦电流电阻率的电路。 电极还连接到用于测量以多个不同纵向间隔间隔开的电极对之间的电阻抗的电路。 优选实施例包括互连在一对电极之间的电压测量电路，该对电极位于连接到阻抗测量电路的最近间隔的一对电极之间，使得阻抗测量的垂直分辨率可以被限制在近似于 一对电极连接到电压测量电路。 根据本发明的用于确定围绕井筒的地层的电阻率分布的方法包括以下步骤：测量地层的聚焦电流电阻率以确定未浸没区域，入侵区域和冲洗区域的复合电阻率。 电阻对之间测量阻抗，每对电极具有不同的纵向间隔，并且从阻抗的测量值确定冲洗区域和入侵区域的电阻率。 然后可以从聚焦电流电阻率的测量来确定非浸没区域的电阻率。

公开(公告)号：US6060885A

公开(公告)日：2000-05-09

申请号：US874218

申请日：1997-06-13

Applicant: Leonty A. Tabarovsky ,  Antonio Fabris ,  Alberto G. Mezzatesta

Inventor： Leonty A. Tabarovsky ,  Antonio Fabris ,  Alberto G. Mezzatesta

IPC: G01V3/22 ,  G01V3/18

CPC classification number: G01V3/22

Abstract: A differential array instrument for determining selected parameters of an earth formation surrounding a borehole, including an instrument mandrel carrying a single source electrode for injecting an electrical current of a predetermined value into the formation surrounding the borehole, and an array of a plurality of measurement electrodes uniformly and vertically spaced from said source electrode along the instrument mandrel. A predetermined group of the uniformly and vertically spaced electrodes are adapted to derive first and second difference potentials between the predetermined group of electrodes, wherein successive ones of a plurality of the predetermined group of selected measuring electrodes uniformly and vertically spaced at increasing distances from the source electrode axially of the borehole are adapted to derive a plurality of the first and second difference potentials between the predetermined group of electrodes. The first and second difference potentials are derived in response to current from the source electrode travelling generally vertically in an orientation generally parallel to the axis of the borehole in the formation to successive ones of the predetermined groups of selected measuring electrodes and which plurality of first and second difference potentials may be correlated to a plurality of values representative of the selected formation parameters. The plurality of values representative of the selected formation parameters may provide a profile of the selected parameters over an increasing radial distance from the borehole.

Abstract translation: 用于确定围绕钻孔的地层的选定参数的差分阵列仪器，包括承载用于将预定值的电流注入到钻孔周围的地层中的单个源电极的仪器心轴和多个测量电极的阵列 沿着仪器心轴与所述源电极均匀且垂直地间隔开。 均匀和垂直间隔开的电极的预定组适于导出预定电极组之间的第一和第二差电位，其中多个预定组的选定测量电极中的连续的电极以均匀且垂直方向间隔开距离源 钻孔轴向的电极适于导出预定电极组之间的多个第一和第二差电位。 第一和第二差异电位是响应来自源电极的电流导出的，所述电流大致垂直地沿着大致平行于地层中的钻孔的轴线的定向行进到所选择的测量电极的预定组中的连续的一个，并且多个第一和第 第二差分电位可以与表示所选择的地层参数的多个值相关。 代表所选择的地层参数的多个值可以在距钻孔的增加的径向距离上提供所选参数的轮廓。

公开(公告)号：US6044786A

公开(公告)日：2000-04-04

申请号：US702145

申请日：1996-08-23

Applicant: Timothy A. Dudley ,  Joseph R. Scarlett

Inventor： Timothy A. Dudley ,  Joseph R. Scarlett

IPC: H02G1/10 ,  B63B21/56

CPC classification number: H02G1/10

Abstract: An apparatus supported by a vessel for removing a seismic cable and attached buoy from water. A clamp for gripping the cable and attached buoy is connected to a boom. The boom manuevers the clamp into engagement with the floating buoy, lifts the buoy from the water, and moves the buoy horizontally relative to the vessel. A cable puller can cooperate with the boom to reel the cable from the water without requiring manual intervention. The boom can comprise an extensible, telescoping structure or an articulated structure. Multiple cable ends can be independently captured to permit cable installation or repair, and the operations can be facilitated with a control panel for operating the moving components.

Abstract translation: 由船舶支撑的装置，用于移除地震电缆并将浮标附着在水面上。 用于夹紧电缆和附接浮标的夹具连接到吊杆。 起重臂将夹具与浮动浮标接合，将浮标从水中提升，并使浮标相对于容器水平移动。 电缆拉拔器可以与起重臂配合以从水中卷起电缆而不需要手动干预。 吊杆可包括可伸缩的伸缩结构或铰接结构。 可以独立地捕获多个电缆端，以允许电缆安装或修理，并且可以通过用于操作移动部件的控制面板来促进操作。

公开(公告)号：US6038197A

公开(公告)日：2000-03-14

申请号：US115307

申请日：1998-07-14

Applicant: Gary A. Sitton ,  Zeljko Jericevic

Inventor： Gary A. Sitton ,  Zeljko Jericevic

IPC: G01V1/36 ,  G01V1/38

CPC classification number: G01V1/368

Abstract: A method for inverting a seismic signal, wherein an input seismic signal is represented as an input vector i(t) of length m+n-1, an output seismic signal is represented as an output vector o(t) of length m, and a finite impulse response filter is represented as a solution vector u(t) of length n, satisfying a convolutional equation i(t)Xu(t)=o(t). An m.times.n Toeplitz matrix T(t,.tau.) corresponding to i(t) is calculated, satisfying a matrix equation T(t,.tau.).multidot.u(t)=o(t). Both sides of the matrix equation are transformed to the frequency domain, to generate a transformed equation. Both sides of the transformed equation are spectrally pruned, to generate a pruned equation. The pruned equation is then solved.

Abstract translation: 一种用于反演地震信号的方法，其中输入地震信号被表示为长度为m + n-1的输入向量i（t），输出地震信号被表示为长度为m的输出向量o（t），以及 有限脉冲响应滤波器被表示为长度为n的解矢量u（t），满足卷积方程i（t）+ E，crc X + EE u（t）= o（t）。 计算对应于i（t）的m×n Toeplitz矩阵T（t，τ），满足矩阵方程T（t，τ）xu（t）= o（t）。 将矩阵方程的两边变换为频域，生成变换方程。 变换方程的两边被光谱修剪，以产生修剪方程。 然后解决修剪方程。

公开(公告)号：US6025722A

公开(公告)日：2000-02-15

申请号：US814753

申请日：1997-03-07

Applicant: Martin T. Evans ,  Andrew R. Burt

Inventor： Martin T. Evans ,  Andrew R. Burt

IPC: G01V3/20 ,  G01U3/18 ,  G01U3/02 ,  G01U3/06

CPC classification number: G01V3/20

Abstract: An instrument for measuring resistivity of earth formations within azimuthal segments. The instrument includes azimuthally separated measure electrodes placed in contact with the wall of a wellbore penetrating the earth formations. The electrodes are placed in contact with the wall by springs, hydraulics or similar mechanisms. A guard electrode surrounds each measure electrode. The instrument includes a booster current electrode axially spaced apart from the guard electrodes. An insulator axially separates the guard electrodes from the booster electrode. Monitor electrodes are disposed on the exterior of the insulator. A first bucking current circuit is connected to the guard electrodes. The first bucking current constrains the flow of measuring currents from each measure electrode to a path substantially perpendicular to the axis of the instrument. A booster current circuit is connected to the booster electrode. The booster current circuit is controllably operated to maintain substantially zero voltage drop across the monitor electrodes. The instrument includes first measuring current sources each connected to one of the measure electrodes, and circuits for measuring voltage and current emitted through each of the measure electrodes. The resistivity of the segment in contact with each measure electrode can be determined from the voltage and current. In a preferred embodiment, the lengths of the booster electrode, insulator and guard electrodes are selected to enable determination of resistivity without having symmetric flow of bucking currents about the axis of the instrument with respect to the measure electrodes.

Abstract translation: 测量方位角段内地层电阻率的仪器。 仪器包括方位角分离的测量电极，其放置成与穿透地层的井眼的壁接触。 电极通过弹簧，液压或类似的机构与壁接触。 保护电极围绕每个测量电极。 仪器包括与保护电极轴向间隔开的增压器电流电极。 绝缘体将保护电极与增压电极轴向分离。 监视电极设置在绝缘体的外部。 第一降压电流电路连接到保护电极。 第一降压电流限制来自每个测量电极的测量电流流到基本上垂直于仪器轴线的路径。 升压电流电路连接到升压电极。 升压电流电路被可控地操作以保持监视电极两端的基本零电压降。 仪器包括各自连接到测量电极之一的第一测量电流源，以及用于测量通过每个测量电极发射的电压和电流的电路。 可以从电压和电流确定与每个测量电极接触的段的电阻率。 在优选实施例中，增强电极，绝缘体和保护电极的长度被选择为能够确定电阻率，而不会相对于测量电极相对于仪器的轴线具有对称的降压电流。

公开(公告)号：US5987125A

公开(公告)日：1999-11-16

申请号：US990505

申请日：1997-12-15

Applicant: J. Haynie Stringer ,  Gary Lynn Fair

Inventor： J. Haynie Stringer ,  Gary Lynn Fair

IPC: G01V1/22 ,  H04L9/08 ,  H04L9/00

CPC classification number: G01V1/22 ,  H04L9/0827

Abstract: Seismic survey data is stored in encrypted format in a first memory. The first memory module is transferred to a first computer in a first location. A portion of the seismic survey data is selected using a second computer in the first location, wherein the second computer communicates with a second location. A request authorization is transmitted from the second computer to the second location. A decryption code is transmitted from the second location to the second computer. The decryption code is transferred from the second computer to the first computer. The decryption code is applied to the selected portion of seismic survey data in the first computer, making available seismic survey data in decrypted format.

Abstract translation: 地震测量数据以加密格式存储在第一个存储器中。 第一存储器模块在第一位置被传送到第一计算机。 使用第一位置中的第二计算机来选择一部分地震勘测数据，其中第二计算机与第二位置通信。 请求授权从第二台计算机发送到第二个位置。 解密码从第二位置发送到第二计算机。 解密码从第二计算机传送到第一台计算机。 解密码适用于第一台计算机的地震勘测数据的选定部分，以解密格式提供地震勘测数据。

公开(公告)号：US5979838A

公开(公告)日：1999-11-09

申请号：US791592

申请日：1997-01-31

Applicant: Richard Peter Romagnoli, Jr.

Inventor： Richard Peter Romagnoli, Jr.

IPC: F16L1/26 ,  G01V1/38 ,  F16L1/12

CPC classification number: G01V1/3843 ,  F16L1/26 ,  B63B2211/02

Abstract: An apparatus and method for retaining a seismic cable connector module to permit in-water repair of seismic cables. A clamp is supported by a vessel positioned over the submerged seismic cable. The seismic cable is raised above the water surface, and the clamp is attached to the exterior surface of the connector module. The clamp can include a lock for securing the connector module, and a swivel between the clamp and the vessel can permit movement of the connector module relative to the vessel as the vessel heaves due to wind and wave action. The clamp can release the connector module if the environmental forces acting on the connector module exceed a selected amount. The clamp can be attached to a separate vessel for in-water use or can be attached to the vessel deck. A clasp within the exterior surface of the connector module is detachably engagable with a clamp supported by the vessel.

Abstract translation: 一种用于保留地震电缆连接器模块以允许地震电缆的水中修复的装置和方法。 夹具由位于浸没地震电缆上方的容器支撑。 地震电缆在水面以上升起，夹具连接到连接器模块的外表面。 夹具可以包括用于固定连接器模块的锁，并且夹具和容器之间的旋转件可允许连接器组件相对于容器的移动，因为容器由于风和波浪作用而起伏。 如果作用在连接器模块上的环境力超过选定的量，则夹具可以释放连接器模块。 夹具可以连接到单独的容器用于水中使用或可以连接到容器甲板上。 连接器模块的外表面内的扣环可拆卸地与容器支撑的夹具接合。

公开(公告)号：US5973321A

公开(公告)日：1999-10-26

申请号：US873229

申请日：1997-06-11

Applicant: Mathew G. Schmidt

Inventor： Mathew G. Schmidt

IPC: G01V5/12 ,  G01V5/10

CPC classification number: G01V5/125

Abstract: A method for determining the fractional amounts of, and the thermal neutron capture cross-sections of, individual components which are included in the decay spectrum measured by a pulsed neutron well logging instrument. The instrument includes a pulsed high energy neutron source, and one or more gamma ray detectors spaced apart from the source. The method includes generating a data kernel which is made up of representors of decay components of the wellbore and of the earth formations in the vicinity of the instrument. The decay spectrum measured by the instrument is inverted to determine parameters by which the representors are scaled so that in combination the scaled representors most closely match the measured decay spectrum. The parameters represent the fractional amounts of each exponential decay component which makes up the measured exponential decay spectrum.

Abstract translation: 用于确定由脉冲中子测井仪测量的衰减光谱中包含的单个组分的分数量和热中子捕获截面的方法。 仪器包括脉冲高能中子源和与源间隔开的一个或多个伽马射线检测器。 该方法包括产生数据核心，该数据核心由仪器附近的井筒和地层的衰减分量的代表构成。 由仪器测量的衰减光谱被反转以确定用于缩放表示器的参数，使得缩放表示器与测量的衰减光谱最接近地匹配。 参数表示构成测量指数衰减光谱的每个指数衰减分量的分数。

公开(公告)号：US5903515A

公开(公告)日：1999-05-11

申请号：US832632

申请日：1997-04-04

Applicant: Craig J. Beasley ,  Everett C. Mobley

Inventor： Craig J. Beasley ,  Everett C. Mobley

IPC: G01V1/36 ,  G01V1/20 ,  G01V1/28

CPC classification number: G01V1/362 ,  G01V2210/522

Abstract: A method for generating an unaliased 3-D DMO operator using two dimensional sampling theory to the spatial traverse of the operator as well as to the temporal axis. First a continuous DMO operator is generated along the line segment connecting a source and a receiver directed at an arbitrary azimuth relative to a biaxial output grid. The operator is discretized at spaced-apart sample points along the DMO aperture segment, the spacing being equal to or less than the output grid dimensions. A exponentially tapered sinc filter function is applied to the samples which are then interpolated onto the output grid.

Abstract translation: 一种使用二维采样理论对运算符的空间遍历以及到时间轴生成未混叠的3-D DMO算子的方法。 首先，沿着连接相对于双轴输出网格的任意方位角的源和接收器的线段生成连续的DMO操作符。 操作者沿着DMO孔径段在间隔开的采样点离散，间距等于或小于输出格栅尺寸。 将指数渐变的sinc滤波器函数应用于样本，然后将其插值到输出栅格上。