Method for realizing pre-stack three-dimensional reverse time migration by utilizing checkpoint technology based on FPGA

A reverse time migration, three-dimensional technology, applied in the field of oil and gas exploration, can solve the problems of data interaction time submerged, FPGA resource utilization is not maximized, etc., to eliminate I/O bottlenecks, improve FPGA resource utilization, The effect of reducing computation time

Pending Publication Date: 2021-12-17
上海雪湖科技有限公司
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Problems solved by technology

In a recent study, it was found that when computing 3D-RTM on heterogeneous platforms through FPGA, different FPGA models have different chip memory resources, and the data interaction time cannot be fully submerged in the calculation proce

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  • Method for realizing pre-stack three-dimensional reverse time migration by utilizing checkpoint technology based on FPGA
  • Method for realizing pre-stack three-dimensional reverse time migration by utilizing checkpoint technology based on FPGA
  • Method for realizing pre-stack three-dimensional reverse time migration by utilizing checkpoint technology based on FPGA

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] 3D-RTM's computational and storage requirements make the computational cost of reverse time migration very high and cannot be used in industrial seismic imaging. The deep and ultra-deep exploration data and high-density seismic data currently faced by oil and gas exploration are very large in volume. Efficient and high-quality calculations are required for such large data volumes. Storage strategies such as wave field reconstruction can effectively solve th

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Abstract

The invention relates to the technical field of oil and gas seismic exploration, in particular to a method for realizing pre-stack three-dimensional reverse time migration by utilizing a checkpoint technology based on an FPGA. The method comprises the steps of setting checkpoint parameters on a CPU platform through software design according to 3D-RTM calculation tasks with different scales and the resource quantity of a selected FPGA chip; and enabling the wave field data calculation time and the required data transmission time to be dynamic so as to achieve the effect of eliminating the I/O bottleneck. The resource utilization rate of the FPGA is improved, the calculation time of the whole calculation task is greatly shortened, and then the acceleration efficiency of the whole heterogeneous calculation is improved. According to the invention, the optimal FPGA and CPU data interaction scheme is set according to the characteristics of data volumes with different scales, so that the whole computing resource utilization rate is optimal. Meanwhile, dynamic adjustment parameters are realized at a CPU platform end through a software architecture, so that the expansibility of the method is greatly enhanced, the utilization rate of computing resources of any FPGA selected for 3D-RTM computing tasks with different scales is improved, and higher compatibility is achieved.

Description

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Application Information

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Owner 上海雪湖科技有限公司
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