摘要:
A method is disclosed and includes receiving a seismic cube. The seismic cube includes a three-dimensional image of a portion of a subsurface area. The method further includes providing the seismic cube to a machine learning process. The machine learning process includes one or more neural networks used for predicting a location of a subsurface seismic layer in the received seismic cube. The method also includes receiving, from the machine learning process, the prediction of the location of the subsurface seismic layer in the seismic cube.
摘要:
The present invention discloses a method for overall exploration of a mature exploration area of oil-rich sags, the method including the following steps: building an area-wide seismic sequence framework for a study area based on uniform 3D seismic data of the study area; determining the spatial distribution characteristics of sedimentary reservoirs in the study area by sequence based on the area-wide seismic sequence framework; grading source rocks in the study area by sequence based on the area-wide seismic sequence framework: counting the spatial distribution characteristics of caprocks in the study area; determining a transporting system for the study area based on the unified 3D seismic data of the study area; classifying potential trap areas in the study area based on the spatial distribution characteristics of the sedimentary reservoirs and the spatial distribution characteristics of the caprocks; and deploying the overall exploration of the study area based on the classification of the potential trap areas, grading of the source rocks and the transporting system of the study area.
摘要:
A method (1310) for attributing a systems tract to a geological environment, including computing (1314) a shelf break for a geologic environment based at least in part on implicit function values associated with the geologic environment; identifying (1318) sea level variations with respect to geological time for the shelf break; and assigning (1322) at least one systems tract to the geologic environment based at least in part on the sea level variations.
摘要:
A system and method may model physical geological structures. Seismic and geologic data may be accepted. A three-dimensional (3D) transformation may be generated between a 3D present day model having points representing present locations of the physical geological structures and a 3D past depositional model having points representing locations where the physical geological structures were originally deposited. An indication may be accepted to locally change the 3D transformation for a subset of sampling points in a first model of the models. The 3D transformation may be locally changed to fit the updated subset of sampling points. A locally altered or updated version of the first model and, e.g., second model, may be displayed where local changes to the first model are defined by the locally changed 3D transformation. The transformation may also be used to extract geobodies in the past depositional model.
摘要:
A method and system are described for creating a subsurface model. In this method, a watertight framework may be adjusted to lessen the ill-formed mesh elements. The method collapses mesh elements and/or eliminates nodes enhance the watertight framework and subsequent subsurface model. The resulting subsurface model may be used in reservoir simulations and hydrocarbon operations.
摘要:
A method for editing a volume-based model imaging geological structures. An initial volume-based model comprising a volumetric mesh and updated geological data defined within a region of the model is received. The volume-based model is decomposed by converting the volumetric mesh into surface meshes linked by stratigraphic fibers to generate a surface-based model. The defined region of the surface-based model is edited by editing positions of control nodes of the surface meshes along the stratigraphic fibers in the defined region of the model so as to fit the updated geological data. The plurality of stratigraphic fibers are updated based on the edited positions of the control nodes so as to fit the updated geological data. The edited surface-based model is meshed to generate an updated volume-based model comprising a volumetric mesh defined by the edited positions of the control nodes. The updated volume-based model is stored and/or displayed.
摘要:
Disclosed are an automatic focus identification method and a system for a Karst cave reservoir. According to the method, velocity replacement is performed based on a pre-stack time migration velocity model to obtain a plurality of replacement migration velocity volumes; pre-stack time migration is performed based on the plurality of replacement migration velocity volumes to obtain a plurality of post-stack seismic data volumes; a three dimensional cube window is selected based on a seismic response characteristic of the Karst cave reservoir; sparse statistical data of a seismic trace or sparse statistical data of a seismic trace attribute of each of the post-stack seismic data volumes in the three dimensional cube window are obtained respectively; and an optimized migration velocity and an optimized seismic trace are obtained through optimization determination.
摘要:
The invention comprises a method of imaging a volume of the earth's subsurface. A selected volume of the earth's subsurface is divided into a three-dimensional grid of voxels. Seismic signals representing seismic energy emanating from the earth's subsurface and detected by sensors deployed in proximity to said selected subsurface volume and conducted to a recorder for recording. The recorded signals are transformed into a grid of discrete voxel signals representing energy emanating from voxels included in said three-dimensional grid of voxels in the earth's subsurface. A smooth analytic function is defined in three dimensional space based on the grid of discrete voxel signals; and fracture surfaces are derived from the smooth analytic function.
摘要:
Seismic stratigraphic features may be enhanced using orientation vectors. In one example, a process includes converting a seismic attribute section from a spatial domain to a spatial-frequency domain using a Fourier transform. For each filter in an orientation filter array, the seismic attribute section is convolved with a filter in the spatial-frequency domain. The convolution result is converted back to the spatial domain by inverse Fourier transform. For each point in the seismic section an orientation filter having a response with a maximum energy is found and the orientation is associated with the corresponding energy and the corresponding point.
摘要:
A method, apparatus and system for, in a computing system, perturbing an initial three-dimensional (3D) geological model using a 3D vector field. A coherent 3D vector field including 3D vectors may be generated where each 3D vector of the 3D vector field is associated with a node of the initial 3D geological model and has a magnitude within a range of uncertainty of the node of the initial 3D geological model associated therewith. The coherent 3D vector field may be applied to the initial 3D geological model associated therewith to generate an perturbed 3D model. The perturbed 3D model may differ from the initial 3D geological model by a displacement defined by the 3D vector field associated with nodes having uncertain values. The perturbed 3D model may be displayed.