data load bidyut

8/10/2019 Data Load Bidyut

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POST STACK DATA LOADING

First Create a Survey

Fig1 : OW Command Menu

In the OpenworksCommand Menu , Select

Data > Management > Seismic Data Manager

Fig2: Seismic Data Manager_3D Survey_General

In the Seismic Data Manager tab , Select 3D Survey

In 3D Survey Compute General and Grid Information

Fig3: Seismic Data Manager_3D Survey_Grid

Save the Survey ( Example Save as Miroli Survey)


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Post-Stack Data Loading Using Seismic Tools

Fig4: Using Seismic Tools


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Fig5: OW Command Menu

In the Openworks Command Menu , Select

Data > Management > Seismic Tools

Fig6: Seismic tools Command Menu

In the Seismic Tools Menu , Select

Seismic > Post Stack data loader > Input data:: Select SEGY and Select Parameters

Post stack Family R5000 window > Input Data > Select Disk > Analyze

(Before analyze check data attribute and domain type)

Fig7

SEGY Data Input tab will Open


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SEG-Y Data Input Window > Select Data Media Storage as Disk > Select Analyze tab

(Check Data Attribute, Domain, update from template etc)

Fig8

(SEGY analyzer window will open)

Fig9

In SEG-Y Analyzer Window select the Disk file name (File > Select > Select the .sgy file).

Select start bottom to start the Analyze ..........Remember It will take some time

Note: The data will shown in Disk File name area , then push the start bottom , it will take automatically the standard

default segy template in Template name area /other wise select the template name from interactive SEGY analyzer

window ( Interactive SEGY Analyzer window > Template > Select> Standard SEGY) and the start the Analyze Process


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Fig10

Fig:11

Fig:12

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The Analyzing Job is complete now. Now to check the template whether it is correct or any scaling factor is required

for CDPX and CDPY value.


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Fig14

Go to the Interactive SEGY Analyzer window and Show EBCIDIC Text header like Iline, X line, Shot Point, CDP

X Coordinate, CDO Y Coordinate etc.

Compare the EBCIDIC text header and BINARY trace heard of selected data whether binary trace header are

correct or any changes is required in In-line, X-line, Shot Point, CDP X and CDP Y Coordinate Position. The

value of CDPX and CDPY may check carefully whether any scaling factor is required or not.

To shoe the Binary Trace Header :: Interactive SEGY Analyzer > Trace > Header view

Fig15


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Fig16

Now Check the Trace header information ( Mainly Shot point, X Cord, Y Cord, #D Line and 3D Trace :: marked in blue

portion of Trace header view ) with EBCDIC Header Information (Which information we already got by clicking

Interactive SEGY Analyzer tab).

Fig:15 Fig16

Comparison Result:

Byte Information of Inline, X Line, CDPX and CDP Y indicated in EBCIDIC Text header is not match with Trace

header view and also digit of CDPX and CDPY is also not correct.

Note the header information in trace header view is showing the information from automatic selected

Standard_SEGY format.So the template format is required modification according the original EBCIDIC data

information.


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SEGY Analyzer browse > Edit template :: This template is the default template named as Standard_SEGY

intially for which wrong trace header fig 16 was shown , therefore modification and also save after this is

required for this template. Later using this modified template we will again analyze the input seismic .sgy

data to check whether the prvious problem byte location value of x y is showing correctly after scaling

factor. If it is shows ok then it will (this modified saved template will be used during our input data loading.

the standard SEGY template will open

SeG y Analyzer window > Browse / Edit template

Fig 17: Browse the default template, which need modification

accordingly EBCIDIC header data and scaling factor for X and Y

Figure18: Corrected teamplate

named as miroli_bidyut2


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Then save the new template after modification

After save ----plz check whether template is change and correct binary header is given for this again the data analyze

and check the x y factor, if it is ok, then save, your template is rready to use for data load


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Display the correct header view ...with cheking of x y factor


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Save the format ................ and this format is apply in template name ------------- and again analyze and see the

differenvce


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