公开(公告)号：US10481297B2

公开(公告)日：2019-11-19

申请号：US13752160

申请日：2013-01-28

Applicant: WESTERNGECO L.L.C.

Inventor： Oda Roaldsdotter Ravndal ,  Jarle Haukås ,  Bjørn Harald Fotland ,  Lars Sønneland

IPC: G01V1/24 ,  G01V99/00

Abstract: A method of determining a migration pathway of a subterranean fluid through a geological volume is provided. The starting object is located within the geological volume. The starting object defines an initial fluid boundary. Data points are distributed through the geological volume. The data points are associated with values of one or more geological attributes. The method includes the steps of: defining an expression which determines a change in position of the fluid boundary at the data points over an iteration based on the values of the one or more attributes; and applying the expression at the data points for successive iterations to evolve the fluid boundary over the successive iterations. The migration pathway of the subterranean fluid through the geological volume can then be determined from the evolution of the fluid boundary.

公开(公告)号：US09341728B2

公开(公告)日：2016-05-17

申请号：US13952831

申请日：2013-07-29

Applicant: WESTERNGECO L.L.C.

Inventor： Aicha Bounaim ,  Oda Roaldsdotter Ravndal ,  Jarle Haukås

IPC: G01V1/30 ,  G01V1/34

CPC classification number: G01V1/301 ,  G01V1/345 ,  G01V2210/66

Abstract: A method of analysing seismic data from a geological volume is provided. The geological volume is divided into a plurality of voxels. For each voxel a respective neighbourhood is defined which includes that voxel and a predetermined arrangement of neighbouring voxels. For each voxel, the respective normal vectors of a seismic attribute vector field derived from the seismic data are calculated. For each voxel, a respective local structure tensor based on the normal vectors of the voxels of the respective neighbourhood is calculated. For each voxel, the value of an expression which includes one or more of the eigenvalues (λ1, λ2, λ3) of the respective local structure tensor is calculated. The method can be used for seismic surveying, or to manage operation of or drilling of a subterranean well.

Abstract translation: 提供了一种从地质体积分析地震数据的方法。 地质体积分为多个体素。 对于每个体素，定义相应的邻域，其包括体素和相邻体素的预定排列。 对于每个体素，计算从地震数据导出的地震属性向量场的各自的法向量。 对于每个体素，计算基于相应邻域的体素的法向量的相应局部结构张量。 对于每个体素，计算包括各个局部结构张量的一个或多个特征值（λ1，λ2，λ3）的表达式的值。 该方法可用于地震测量，或用于管理地下井的作业或钻井。