公开(公告)号：US09348056B2

公开(公告)日：2016-05-24

申请号：US14453466

申请日：2014-08-06

Applicant: BP Corporation North America Inc.

Inventor： Joanne Fredrich ,  Nathan Lane ,  Julianna Toms

IPC: G06K9/00 ,  G01V8/00 ,  G01N33/24 ,  G06T7/00 ,  G01N23/04 ,  G06F17/50

CPC classification number: G01V8/00 ,  G01N23/046 ,  G01N33/24 ,  G06F17/5018 ,  G06T7/11 ,  G06T7/136 ,  G06T2207/10072 ,  G06T2207/10081 ,  G06T2207/20112 ,  G06T2207/30132

Abstract: A testing system for performing image based direct numerical simulation to characterize petrophysical properties of a rock sample under the simulated deformation condition, for example as representative of subsurface conditions. A digital image volume corresponding to x-ray tomographic images of a rock sample is segmented into its significant elastic phases, such as pore space, clay fraction, grain contacts and mineral type, and overlaid with an unstructured finite element mesh. A simulated deformation is applied to the segmented image volume, and the resulting deformed unstructured mesh is numerically analyzed, for example by way of direct numerical simulation, to determine the desired petrophysical properties.

Abstract translation: 一种用于进行基于图像的直接数值模拟以在模拟变形条件下表征岩石样品的岩石物理性质的测试系统，例如作为地下条件的代表。 对应于岩石样品的X射线断层图像的数字图像体积被分割成其显着的弹性相，例如孔隙，粘土分数，晶粒接触和矿物类型，并且覆盖有非结构化的有限元网格。 对分割的图像体积应用模拟变形，并且例如通过直接数值模拟来数值地分析所得到的变形的非结构化网格以确定期望的岩石物理性质。

公开(公告)号：US20180121579A1

公开(公告)日：2018-05-03

申请号：US15797121

申请日：2017-10-30

Applicant: BP Corporation North America Inc.

Inventor： Joanne Fredrich ,  Nathan Lane

IPC: G06F17/50 ,  G01V99/00

CPC classification number: G06F17/5009 ,  G01V99/005 ,  G06F2217/16 ,  G06T7/11 ,  G06T7/62

Abstract: A method for analyzing a rock sample includes segmenting a digital image volume corresponding to the rock sample, to associate voxels in the digital image volume with pore space or solid material. A distance transform is applied to each pore space voxel. The distance transform assigns a distance value to the pore space voxel specifying distance from the pore space voxel to a solid material voxel. Drainage is numerically simulated by, for a pore space, selecting each distance value assigned to a pore space voxel that is greater than a predetermined threshold value to represent a radius of a sphere of a non-wetting fluid introduced into the pore space. The sphere is centered at the pore space voxel corresponding to the distance value. The digital image volume is numerically analyzed to characterize a material property of the rock sample at a non-wetting fluid saturation produced by the drainage.

公开(公告)号：US10997327B2

公开(公告)日：2021-05-04

申请号：US15797121

申请日：2017-10-30

Applicant: BP Corporation North America Inc.

Inventor： Joanne Fredrich ,  Nathan Lane

IPC: G06F30/20 ,  G01V99/00 ,  G06T7/11 ,  G06T7/62 ,  G06F111/10

Abstract: A method for analyzing a rock sample includes segmenting a digital image volume corresponding to the rock sample, to associate voxels in the digital image volume with pore space or solid material. A distance transform is applied to each pore space voxel. The distance transform assigns a distance value to the pore space voxel specifying distance from the pore space voxel to a solid material voxel. Drainage is numerically simulated by, for a pore space, selecting each distance value assigned to a pore space voxel that is greater than a predetermined threshold value to represent a radius of a sphere of a non-wetting fluid introduced into the pore space. The sphere is centered at the pore space voxel corresponding to the distance value. The digital image volume is numerically analyzed to characterize a material property of the rock sample at a non-wetting fluid saturation produced by the drainage.

公开(公告)号：US11009497B2

公开(公告)日：2021-05-18

申请号：US16445773

申请日：2019-06-19

Applicant: BP Corporation North America Inc.

Inventor： Jennie Cook ,  Abdulla Kerimov ,  Nathan Lane

IPC: G06K9/00 ,  G01N33/24 ,  G06T7/136 ,  G06T7/11 ,  G06T7/00

Abstract: A method for analyzing a rock sample to determine a mechanical property of the rock sample includes (a) segmenting a digital image volume corresponding to an image of the rock sample. In addition, the method includes (b) partitioning the digital image volume to associate a plurality of voxels in the digital image volume with a plurality of grains of the rock sample. Further, the method includes (c) determining the voxels of the plurality of voxels that are adjacent to each other to identify a plurality of contact interfaces between the grains. Still further, the method includes (d) determining a contact area of each of the contact interfaces using adjacent voxels at the corresponding grain-grain interface. The method also includes (e) determining a number of contact interfaces that each grain of the plurality of grains has with each adjacent grain. Moreover, the method includes (f) determining the one or more mechanical properties of the rock sample based on the number of the contact interfaces of each of the plurality of grains and the contact area of each of the contact interfaces.

公开(公告)号：US20190391125A1

公开(公告)日：2019-12-26

申请号：US16445773

申请日：2019-06-19

Applicant: BP Corporation North America Inc.

Inventor： Jennie Cook ,  Abdulla Kerimov ,  Nathan Lane

IPC: G01N33/24 ,  G06T7/00 ,  G06T7/136 ,  G06T7/11

Abstract: A method for analyzing a rock sample to determine a mechanical property of the rock sample includes (a) segmenting a digital image volume corresponding to an image of the rock sample. In addition, the method includes (b) partitioning the digital image volume to associate a plurality of voxels in the digital image volume with a plurality of grains of the rock sample. Further, the method includes (c) determining the voxels of the plurality of voxels that are adjacent to each other to identify a plurality of contact interfaces between the grains. Still further, the method includes (d) determining a contact area of each of the contact interfaces using adjacent voxels at the corresponding grain-grain interface. The method also includes (e) determining a number of contact interfaces that each grain of the plurality of grains has with each adjacent grain. Moreover, the method includes (f) determining the one or more mechanical properties of the rock sample based on the number of the contact interfaces of each of the plurality of grains and the contact area of each of the contact interfaces.