A Forward Modeling Method Based on Data Segmentation of Arranged Slices in 3D Observation System
An observation system and forward modeling technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of extremely time-consuming, large amount of data, and inability to realize large amount of model data, so as to improve computing efficiency. Effect
Active Publication Date: 2016-10-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
Three-dimensional numerical simulation is very important, but it is very difficult to implement, mainly due to the large amount of data and calculation. One construction requires thousands of shots, each shot requires thousands of passes, and each pass has thousands of data points
Single computer, because of the large amount of model data cannot be realized
If a multi-node computer is simply parallelized by pressing the gun, it will not be able to simulate the actual production process
Data input and output are difficult to manage and time-consuming
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[0036] A forward simulation method based on the data segmentation of array slices in the 3D observation system, where the array slices are fired and the data is received on each node; firstly, the model and the 3D observation system are designed, and then the beamline number and the array slice number are transmitted at the master node, After other nodes receive the beamline number and array number, they first call the model data cutting function to obtain the model data corresponding to the array, and then call the 3D finite difference forward modeling function to calculate the wave field. In the 3D finite difference forward modeling function A cycle of gun platoon and shot point number is added to realize the forward simulation of multiple guns or multiple gun lines in a single array.
[0037] Basic principle of the present invention is:
[0038] In 3D forward modeling, starting from the 3D wave equation of heterogeneous and isotropic media, the widely used staggered grid hi...
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The invention discloses a forward simulation method based on data segmentation of array slices of a three-dimensional observation system, which is characterized in that the firing and data reception of array slices are performed on each node; firstly, the model and the three-dimensional observation system are designed, and then the beamline is transmitted at the main node number and arrangement piece number, after other nodes receive the beamline number and arrangement piece number, first call the model data cutting function to obtain the model data corresponding to the arrangement piece, and then call the three-dimensional finite difference forward modeling function to calculate the wave field. This function adds a cycle of gun platoons and shot point numbers to realize the forward modeling of multiple guns or multiple gun lines in a single array. The invention realizes the parallel calculation method of the three-dimensional forward modeling simulation of the model through the data segmentation strategy based on the array slices, which can greatly improve the calculation efficiency of the simulation based on the three-dimensional observation system compared with the traditional parallel mode of the shot record, and is feasible through preliminary verification.
Description
technical field [0001] The invention belongs to the field of seismic numerical forward modeling for oil and gas exploration, and is an efficient forward modeling method based on data segmentation of array slices of a three-dimensional observation system. Background technique [0002] Many scholars have done relevant research on the numerical forward modeling method of the two-dimensional cave model. For example, Min Xiaogang et al. (2006) derived the staggered grid finite difference scheme for the two-dimensional elastic wave equation under the condition of heterogeneous media, and carried out the forward simulation calculation of the fracture-vug model in Tahe Oilfield; Dong Liangguo et al. (2010) adopted The high-order finite-difference seismic wave propagation numerical simulation method, which can change the spatial grid size and time step size arbitrarily, carried out seismic wave numerical simulations with different main frequencies for cave series models of different ...
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IPC IPC(8): G06F19/00G01V1/30
Inventor 张军华吴成李军张在金黄广谭肖文张明张秋范腾腾李宇航
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)