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：US10450861B2

公开(公告)日：2019-10-22

申请号：US14957531

申请日：2015-12-02

Applicant: Schlumberger Technology Corporation

Inventor： Gong Li Wang ,  Tianxia Zhao ,  Keli Sun ,  Aria Abubakar

IPC: E21B49/00 ,  G01V3/28 ,  G01V3/38

Abstract: Identifying the dielectric constant and/or the electrical resistivity of part of a geological formation may reveal useful characteristics of the geological formation. This disclosure provides methods, systems, and machine-readable media to determine dielectric constant or electrical resistivity, or both, using contraction mapping. Specifically, contraction mapping may be used with a function of wavenumber k to iteratively solve for values of dielectric constant and electrical resistivity until convergence is achieved. This may allow for convergence to a solution without computing partial derivatives and/or with fewer iterations than previous techniques.

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：US10370963B2

公开(公告)日：2019-08-06

申请号：US15026230

申请日：2014-09-30

Applicant: Schlumberger Technology Corporation

Inventor： Keli Sun ,  Dzevat Omeragic ,  Steve F. Crary

IPC: G01V3/18 ,  G01V3/26 ,  G01V3/38 ,  E21B49/00 ,  G01V99/00 ,  E21B47/022

Abstract: Techniques for log squaring using both directional and non-directional electromagnetic measurements are disclosed. The techniques described herein can be used for determining bed boundary locations and assigning resistivity values to each layer in a layered earth model, regardless of well deviation. Potential bed boundary locations can be derived from both directional and non-directional electromagnetic measurement data. The bed boundary locations from the directional and non-directional measurements can then be consolidated using a weighted averaging scheme, where weight can be dependent based on apparent formation dip. By combining the results from both directional and non-directional measurements, the log squaring techniques described herein can be used in most wells regardless of the well angle (the angle can be arbitrary). Once bed boundaries are selected, formation properties, such as horizontal resistivity (Rh) and vertical resistivity (Rv) can be assigned to the model layers.

公开(公告)号：US10157167B2

公开(公告)日：2018-12-18

申请号：US14975620

申请日：2015-12-18

Applicant: Schlumberger Technology Corporation

Inventor： Gong Li Wang ,  Keli Sun ,  Aria Abubakar ,  Thomas D. Barber

IPC: E21B43/26 ,  G06F17/16 ,  G01V99/00 ,  G01V3/38 ,  G01V3/28

Abstract: A system and method discloses performing a fracture operation at a wellsite about a subterranean formation. The method involves, obtaining wellsite measurements by placing a downhole tool in a wellbore and using the downhole tool to acquire measurements of the subterranean formation, simulating the obtained wellsite measurements to determine formation parameters comprising conductivity tensors based on a formation model of the measured subterranean formation, validating the formation model by comparing the obtained wellsite measurements with the simulated wellsite measurements, generating fracture parameters and triaxiality indicators based on the validated formation model, and fracturing the subterranean formation based on the generated fracture parameters and triaxiality indicators.

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。

公开(公告)号：US09057797B2

公开(公告)日：2015-06-16

申请号：US13874275

申请日：2013-04-30

Applicant: Schlumberger Technology Corporation

Inventor： Dzevat Omeragic ,  Keli Sun ,  Qiming Li ,  Tarek M. Habashy

IPC: G01V3/26 ,  G01V3/40 ,  G01V3/20 ,  G01V3/28

CPC classification number: G01V3/20 ,  G01V3/28

Abstract: A multi-step electromagnetic inversion method is provided for determining formation resistivity, anisotropy and dip. An electromagnetic logging tool is used to obtain non-directional, anisotropy, and directional (including symmetrized and anti-symmetrized resistivity measurements) in a formation using an electromagnetic logging tool. Bed boundaries of the formation are first identified. A horizontal resistivity profile is obtained using the non-directional resistivity measurements, and a vertical resistivity profile is obtained using the anisotropy resistivity measurements. The vertical resistivity profile is improved using the directional resistivity measurements, while dip values are also obtained via an inversion using the directional resistivity measurements. Then, an inversion for each of vertical resistivity, horizontal resistivity, dip values, and bed boundaries is performed using all of the non-directional, anisotropy, and directional resistivity measurements to obtain a formation model.

Abstract translation: 提供了一种用于确定地层电阻率，各向异性和倾角的多步电磁反演方法。 电磁测井工具用于使用电磁测井仪在地层中获得无方向性，各向异性和方向性（包括对称和抗对称电阻率测量）。 首先确定地层的床边界。 使用非方向电阻率测量获得水平电阻率分布，并且使用各向异性电阻率测量获得垂直电阻率分布。 使用方向电阻率测量提高了垂直电阻率分布，而通过使用方向电阻率测量的反演也获得了倾角值。 然后，使用所有非方向性，各向异性和方向电阻率测量来执行垂直电阻率，水平电阻率，浸渍值和床边界中的每一个的倒置以获得形成模型。