Abstract:
A system to provide on-demand fetching of sequential sets of seismic data to local memory from slower storage mediums prior to performing computing operations, such as horizon auto-tracking, amplitude extraction and seismic attribute generation. As a result, the performance of the storage infrastructure (e.g., hard drives, storage filer "file server" over network, etc.) is maximized and the local memory/cache speed is fully utilized to deliver optimal system performance even when working with large seismic datasets that exceed the storage capacity of the local memory.
Abstract:
An interpolated subsurface volume including control cells and derived cells is obtained, whereby the derived cells include attribute values derived from the control cells. A set of peak cells is selected according to attribute values. The attribute value from the derived cells or the control cells in the peak cell is a local extrema. A correlation coefficient is determined that characterizes a spatial relationship between the location of the peak cells and the location of the control cell. The correlation coefficient is presented.
Abstract:
A method for raycasting based on an irregular grid. The method includes raycasting, in a static mode, rays based on the irregular grid to generate a static image of a three dimensional (3D) volume dataset. The 3D volume dataset includes irregular grid cells based on the irregular grid. The method further includes reducing a tally of the rays to generate a reduced tally of rays based on a rendering time of the static image and an animation frame rate, and generating, in a dynamic mode, an animation of the 3D volume dataset at the animation frame rate by at least performing raycasting based on the reduced tally of rays.
Abstract:
A method is described for seismic imaging of complex subsurface volumes including an optimized partial stack based on ray coverage determined for vector image partition tiles. The method may be executed by a computer system.
Abstract:
A method for seismic geological lineation mapping, wherein a seismic dataset is collected, with information about minor lineations generated by subtle structural geological features in an underground earth formation. Seismic attribute volumes are identified in the seismic dataset, relating to trace continuity, amplitude, frequency and phase. The attribute volumes may have an insufficient resolution to display the minor lineations. A seismic multivolume lithological lineation map is generated, in which single attribute lineation maps generated for each of the identified seismic attribute volumes are combined to accurately display the minor lineations generated by the subtle geological features.
Abstract:
A system for manipulating an image of a three-dimensional data volume comprises a data processing system, a touch screen electrically connected to the processing system so as to recognize a plurality of gestures, and a visual representation of a three-dimensional data volume displayed on the touch screen, wherein the processing system is configured to allow a user to select, view, and move a cross-section of said data volume by tapping a desired portion of the visual representation twice with a contact device and moving the contact device across the touch screen while maintaining contact with the touch screen after the second tap.
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 (λ 1 , λ 2 , λ 3 ) 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:
Embodiments of a method for enhancing flat spots in 3D seismic interpretation are disclosed herein. Embodiments of the method generally involve an operation of horizontally stacking (summing) traces within a user defined elongate area. The user may define the size and shape of the elongate area. In addition, the elongate area may be automatically aligned to a user defined axis such as without limitation, the structure strike. By aligning an elongate area operator with a selected or user selected axis, and with appropriate choice of axis length, it is possible to constrain the stacking operation within geologic strata, allowing the user to image even narrow flat events that wrap around a subterranean structure. Further details and advantages of various embodiments of the method are described in more detail herein.
Abstract:
The present invention relates to a method to process a three dimensional seismic image. The method comprises, for a center point and for a plane comprising said center point, said plane defining a first connected set of points, a second connected set of points, determining a first maximal correlation between a first vector of the seismic values associated with at least a point of the seismic image having a distance to the center point below the predetermined distance and on a first line, said plane comprising said first line, and a second vector of the seismic values associated with points on a second line parallel to the first line, the second vector being shifted by a plurality of shifting distances; determining a second maximal correlation between the first vector, and a third vector of the seismic values associated with points on a third line parallel to the first line, the third vector being shifted by a plurality of shifting distances; and /e/ determining a difference value based on at least a difference between the first maximal correlation and the second maximal correlation.
Abstract translation:本发明涉及一种处理三维地震图像的方法。 该方法包括对于中心点和对于包括所述中心点的平面,所述平面限定第一连接的点集合,第二连通点集合,确定与在...相关联的地震值的第一矢量之间的第一最大相关性 所述地震图像的至少一点距离所述中心点的距离低于所述预定距离,并且在第一线上,所述平面包括所述第一线,以及与平行于所述第一线的第二线上的点相关联的地震值的第二矢量 所述第二矢量移位多个移动距离; 确定所述第一矢量与与所述第一线平行的第三线上的点相关联的地震值的第三矢量之间的第二最大相关性,所述第三矢量移位多个移动距离; 和/ e /至少基于第一最大相关和第二最大相关之间的差来确定差值。