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Direct imaging of simultaneous-source data

Introduction

Simultaneous-source acquisition technology can obtain better spatial-sampled blended seismic data with significantly faster efficiency in field survey. However, the strong cross-talk noise would be introduced in the final image by directly imaging of blended data. To solve this problem, I propose three direct imaging methods of blended-data.

This part of work is my research study at PhD period.

Prerequisites

The source code is developed based on Magdagscar, which is an open-source software package for multidimensional data analysis and reproducible computational experiments.

You can read the installtion guide of Magdagscar.

Source Description

The file tree is as follow:

── README.md
├── example
│   └── SConstruct
├── images
│   └── lsrtm_fig9.png
└── pzhang
    ├── Mlsprertm2d.c
    ├── Mlsrtmse.c
    ├── Mlsrtmwp.c
    ├── Mmod2refl.c
    ├── Mprertm2d_v03.c
    ├── Mprertm2d_v04.c
    ├── Msetspk.py
    ├── SConstruct
    ├── dbg.c
    ├── laplac2.c
    ├── lsprertm2d.c
    ├── lsrtmsr.c
    ├── prertm2d_v03.c
    └── prertm2d_v04.c
  1. README.md : The file you are reading.
  2. example : Demo example
  3. images : images folder
  4. pzhang : source code folder

Compile

  1. Install Magdagscar
  2. cp pzhang folder to path_to_madagascar/user/
  3. cd into path_to_madagascar folder and execute follow command:
$ scons -Q
$ make install

The Magdagscar construct program will automatic generate the header file, compile and link the source file and move your executable file to $RSF_ROOT/bin folder.

Example

In this example, The SConstruct file will download the Marmousi model from internet, then generate the common-shot-gather data using finite-difference method.

After that, the blended-data will be simulated using zero-delay encoding strategy.

In the migration imaging process, this example will generate three difference migration results:

  1. RTM result of conventional acquisition
  2. RTM result of simultaneous-source acquisition
  3. LSRTM result of blended-data after 5 iterations
  4. SE-LSRTM result of blended-data after 5 iterations
  5. WSE-LSRTM result of blended-data after 5 iterations

results

The corresponding relationships in the above figure are as follows:

(a) true reflecitity

(b) -> 1

(c) -> 2

(d) -> 3

(e) -> 4

(f) -> 5