公开(公告)号：US10451769B2

公开(公告)日：2019-10-22

申请号：US15005666

申请日：2016-01-25

Applicant: Schlumberger Technology Corporation

Inventor： John C. Rasmus ,  Christopher E. Morriss ,  Koji Ito ,  Hui Xie ,  Roger Griffiths ,  Shahzad A. Asif ,  David Maggs

IPC: G01V11/00

Abstract: A method for transforming a 2D or 3D earth volume geometry into a 1D earth volume geometry includes performing a measurement using the measurement sensor in a wellbore. A layer boundary in the 2D or 3D earth volume geometry that is nearest to the measurement sensor is identified. A vector from the measurement sensor is generated toward the nearest layer boundary. A first intersection is identified between the vector and the nearest layer boundary, and a second intersection is identified between the vector and another layer boundary. Simulated boundaries that extend through the first and second intersections and are perpendicular to the vector are generated. The 1D earth volume geometry that is bounded by the first and second intersections is identified. A property value is extracted from the 2D or 3D earth volume geometry between the first and second intersections. The property value is assigned to the 1D earth geometry.

公开(公告)号：US09945977B2

公开(公告)日：2018-04-17

申请号：US15026234

申请日：2014-10-02

Applicant: Schlumberger Technology Corporation

Inventor： Keli Sun ,  Roger Griffiths ,  Steve Crary ,  Christopher Morriss ,  Koji Ito

IPC: G01V3/00 ,  G01V3/28 ,  G01V3/30 ,  G01V3/38

CPC classification number: G01V3/28 ,  G01V3/30 ,  G01V3/38

Abstract: Embodiments set forth in this disclosure providing techniques for determining formation parameters, such as horizontal resistivity (Rh), vertical resistivity (Rv), and dip, in high angle and horizontal wells using non-directional resistivity measurements. For example, a method is provided that may include using an electromagnetic logging tool to acquire non-directional resistivity measurements in a wellbore of a high angle or horizontal well. The method may also include defining a processing window that corresponds to a measurement point of the electromagnetic logging tool along a well trajectory that intersects a at least one bed boundary between two layers of a subsurface formation. The method may also include defining a formation structure and defining an initial set of formation parameters for each layer in the formation structure. Furthermore, the method may include inverting the formation parameters for each layer.

公开(公告)号：US11774631B2

公开(公告)日：2023-10-03

申请号：US17250041

申请日：2019-05-10

Applicant: Schlumberger Technology Corporation

Inventor： Joan Abadie ,  Mohammad Taghi Salehi ,  Koji Ito ,  John Rasmus ,  Xiao Bo Hong

IPC: G01V5/10

CPC classification number: G01V5/107

Abstract: A method can include receiving neutron data and density data for a borehole in a geologic formation; determining a migration length value for a layer of the geologic formation based at least in part on the neutron data; forward modeling at least the layer based at least in part on the migration length value and the density data; and outputting, based at least in part on the forward modeling, modeled neutron data for the layer.

公开(公告)号：US20210124082A1

公开(公告)日：2021-04-29

申请号：US16663988

申请日：2019-10-25

Applicant: Schlumberger Technology Corporation

Inventor： Gong Li Wang ,  Koji Ito ,  Xiao Bo Hong

IPC: G01V3/38 ,  G01V3/30

Abstract: Properties of a geological formation, such as vertical resistivity values, horizontal resistivity values, dip, and azimuth may be determined by inverting electromagnetic (EM) well log data based at least in part on an anisotropic formation model and a cost function. The cost function may include a data misfit term, a smoothness term, and an entropy term. In some embodiments, one or more of the data misfit term, the smoothness term, and the entropy term may be represented as functions of vertical conductivity and horizontal conductivity. The cost function may include one or more regularization parameters that are based at least in part on the data misfit term. Further, the cost function may include one or more relaxation factors that are based at least in part on a ratio of the Hessians of the smoothness term and the data misfit term.

公开(公告)号：US10323498B2

公开(公告)日：2019-06-18

申请号：US15026232

申请日：2014-10-01

Applicant: Schlumberger Technology Corporation

Inventor： Keli Sun ,  Koji Ito ,  Christopher E. Morriss ,  Roger Griffiths ,  Steve F. Crary ,  Shahzad A. Asif

IPC: E21B44/00 ,  E21B7/06 ,  E21B47/02 ,  E21B47/12 ,  E21B49/00

Abstract: Methods, computer-readable media, and systems are disclosed for applying 1D processing in a non-1D formation. In some embodiments, a 3D model or curtain section of a subsurface earth formation may be obtained. A processing window within the 3D model or curtain that is suitable for 1D inversion processing is determined, and a local 1D model for the processing window is built. A 1D inversion is performed on the local 1D model, and inverted formation parameters are used to update the 3D model or curtain section.

公开(公告)号：US20160370480A1

公开(公告)日：2016-12-22

申请号：US15122376

申请日：2015-02-27

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Sushil Shetty ,  John Rasmus ,  Christopher Edward Morriss ,  Koji Ito ,  Shahzad Asif ,  Vittorio Picco

IPC: G01V1/30 ,  G01V1/34

CPC classification number: G01V1/30 ,  G01V1/34 ,  G01V1/50 ,  G01V3/18 ,  G01V5/04

Abstract: A method for automatic interpretation of bulls-eye and sinusoidal features observed in LWD images is disclosed. In some embodiments, the method includes an automatic workflow for extracting smooth contours from images that demarcate boundaries of structural features, followed by projection of the contours to three-dimensional (3D) point clouds in the well coordinate system for structural interpretation. The method may characterize both sinusoidal features and bulls-eye features, taking into account variations of formation dip/azimuth, or well inclination/azimuth, on the topology of a structural feature. The disclosed method may be sufficiently fast for use in real-time analysis and interpretation, or to provide constraints for physics-based data inversion processing.

Abstract translation: 公开了一种用于自动解释LWD图像中观察到的多眼和正弦特征的方法。 在一些实施例中，该方法包括用于从划分结构特征的边界的图像提取平滑轮廓的自动工作流程，随后将轮廓投影到用于结构解释的井坐标系中的三维（3D）点云。 考虑到结构特征的拓扑结构的地层倾斜/方位角或井倾角/方位角的变化，该方法可以表征正弦特征和公牛眼特征。 所公开的方法可以足够快以用于实时分析和解释，或为基于物理的数据反演处理提供约束。

公开(公告)号：US11255994B2

公开(公告)日：2022-02-22

申请号：US16345806

申请日：2017-10-25

Applicant: Schlumberger Technology Corporation

Inventor： Koji Ito ,  Xiao Bo Hong ,  Keli Sun ,  Aria Abubakar

IPC: G01V1/28 ,  E21B47/16 ,  G01V1/50 ,  G01V11/00 ,  G01V99/00 ,  E21B17/02

Abstract: A method includes receiving information for a subsurface region; based at least in part on the information, identifying sub-regions within the subsurface region; assigning individual identified sub-regions a dimensionality of a plurality of different dimensionalities that correspond to a plurality of different models; via a model-based computational framework, generating at least one result for at least one of the individual identified sub-regions based at least in part on at least one assigned dimensionality; and consolidating the at least one result for multiple sub-regions.

公开(公告)号：US11204438B2

公开(公告)日：2021-12-21

申请号：US16663988

申请日：2019-10-25

Applicant: Schlumberger Technology Corporation

Inventor： Gong Li Wang ,  Koji Ito ,  Xiao Bo Hong

IPC: G01V3/38 ,  G01V3/30 ,  G01V99/00

Abstract: Properties of a geological formation, such as vertical resistivity values, horizontal resistivity values, dip, and azimuth may be determined by inverting electromagnetic (EM) well log data based at least in part on an anisotropic formation model and a cost function. The cost function may include a data misfit term, a smoothness term, and an entropy term. In some embodiments, one or more of the data misfit term, the smoothness term, and the entropy term may be represented as functions of vertical conductivity and horizontal conductivity. The cost function may include one or more regularization parameters that are based at least in part on the data misfit term. Further, the cost function may include one or more relaxation factors that are based at least in part on a ratio of the Hessians of the smoothness term and the data misfit term.

公开(公告)号：US20190265373A1

公开(公告)日：2019-08-29

申请号：US16345806

申请日：2017-10-25

Applicant: Schlumberger Technology Corporation

Inventor： Koji Ito ,  Xiao Bo Hong ,  Keli Sun ,  Aria Abubakar

IPC: G01V1/28 ,  G01V1/50 ,  E21B47/16

Abstract: A method includes receiving information for a subsurface region; based at least in part on the information, identifying sub-regions within the subsurface region; assigning individual identified sub-regions a dimensionality of a plurality of different dimensionalities that correspond to a plurality of different models; via a model-based computational framework, generating at least one result for at least one of the individual identified sub-regions based at least in part on at least one assigned dimensionality; and consolidating the at least one result for multiple sub-regions.

公开(公告)号：US20160252643A1

公开(公告)日：2016-09-01

申请号：US15026234

申请日：2014-10-02

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Keli Sun ,  Roger Griffiths ,  Steve Crary ,  Christopher Morriss ,  Koji Ito

IPC: G01V3/28

CPC classification number: G01V3/28 ,  G01V3/30 ,  G01V3/38

Abstract: Embodiments set forth in this disclosure providing techniques for determining formation parameters, such as horizontal resistivity (Rh), vertical resistivity (Rv), and dip, in high angle and horizontal wells using non-directional resistivity measurements. For example, a method is provided that may include using an electromagnetic logging tool to acquire non-directional resistivity measurements in a wellbore of a high angle or horizontal well. The method may also include defining a processing window that corresponds to a measurement point of the electromagnetic logging tool along a well trajectory that intersects a at least one bed boundary between two layers of a subsurface formation. The method may also include defining a formation structure and defining an initial set of formation parameters for each layer in the formation structure. Furthermore, the method may include inverting the formation parameters for each layer.

Abstract translation: 在本公开中提出的实施例提供了使用非方向电阻率测量来确定高角度和水平井中的地层参数（例如水平电阻率（Rh）），垂直电阻率（Rv）和倾角的技术。 例如，提供了一种方法，其可以包括使用电磁测井工具在高角度或水平井的井眼中获取非方向电阻率测量。 该方法还可以包括定义对应于电磁测井工具的测量点的处理窗口沿着与地下地层的两层之间的至少一个床边界相交的井轨迹。 该方法还可以包括限定地层结构并且为地层结构中的每个层定义初始的地层参数集合。 此外，该方法可以包括颠倒每层的地层参数。