ONGC’s Feedback for POSC
P.K. Mittal
GM-Head EPINET Project
Oil & Natural Gas Corporation Ltd
India
P.Mittal, Head EPINET, ONGC
EPINET
• Exploration and Production Information Networking
project
• Distributed databases involving 18 servers
• A 3-Tier database approach for data flow:
– Field level : Asset/Forward Base Database
– Regional level : Basin Database
– Corporate level : Corporate Database
• Covers Well, Production, Drilling, Seismic, Logging &
Physical Asset data utilizing
– Online Master Database
– Log Archival Database
– Seismic Archival Database
P.Mittal, Head EPINET, ONGC
Softwares
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FINDER
LOGDB
SEISDB
DRILLDB
ASSETDB
GEOFRAME GEOLOGY
GEOFRAME PETROPHYSICS
DECISION POINT DATA ACCESS
P.Mittal, Head EPINET, ONGC
Databases & Their Integration
1. Corporate Server Dehradun
•KDMIPE, IDT, GEOPIC, E&D Dte & Frontier Basin
2. Regional
Server Panvel
3. Regional
Server Baroda
•Western Offshore Basin
•IOGPT
•Western Onshore Basin
4. Regional
Server Jorhat
•A&AA Basin
5. Regional
Server Chennai
7. Regional
Server Kolkata
•Cauvery Basin
•CBM-BPM Basin
9. Ahmedabad
Site Server
•IRS
•A’Bad Asset
10.Mehsana
Site Server
14. Nazira
Site Server
•Assam Asset
6.
Rajahmundry
Site Server
•KG Basin
•Rajahmundry Asset
•Mehsana Asset
8. Vasudhara
Site Server
•Mumbai High Asset
•Neelam Asset
•Bassein Asset
•Uran plant
•Hazira plant
11.Ankleshwar
Site Server
•Ankleshwar Asset
12. Cambay
Site Server
•Cambay FB
13. Jodhpur
P.Mittal, Head EPINET, ONGC
Site Server
•Jodhpur FB
15. Agartala
Site Server
•Tripura Asset
16. Silchar
Site Server
•Cachar FB
17 Karaikal
Site Server
•Karaikal Asset
ONGC’s UWI Policy
• Maximum Character size is 20.
– 2 characters are reserved for the Region Code
– 5 characters are reserved for the Field/Structure
Code
– 13 characters are reserved for the Well_No and the
Well_Type_Code.
• Some of the examples of the UWI generated
are:
– W-AMBD-20 (Western Region, Ahmedabad , Well no
20)
– M-B-126-5 (Field code=’M-B-126’, Well no=’5’)
P.Mittal, Head EPINET, ONGC
UWI- Well Type Codes
• Well Type Code codes are
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Horizontal………………..(H)
Drain Hole……………….(DH)
Sub sea Completion …...(SS)
1st SideTrack……….…. (Z)
2nd Side Track……….….(Y)
3rd Side track ……….…..(X)
Multilateral ……….
(ML)
First Multilateral……... (ML1)
Second Multilateral….…..(ML2)
• Examples: M-B173A-A6-H (Horizontal well A6
of B173A Structure)
P.Mittal, Head EPINET, ONGC
Seismic Data Management Issues
• Location data & trace data stored
separately
• Viewing data is through different S/W
applications
• Near line storage
• Aggregation/Merging
• Reloading (?)
• Need for a separate SIG (?)
P.Mittal, Head EPINET, ONGC
On land Seismic Survey Name
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Survey name will be of max 20 characters as shown below :Basin Code –Four Characters as followed in Finder
For Onshore-Two Characters i.e. ON
Separator-One Character
Block Code-Three characters
2D or 3D-Two characters
Separator-One Character
State Code-Max two Characters (As mentioned in Annexure-II)
Investigation No-Max five characters
Example-CMBYON-MEH2D-G401
CMBYON-ANK3D-G423
CMBYON-ANK3D-MERGE1
MERGE1 should indicate the seismic investigation
numbers considered for the merging, the details of which
should be given in C19 of Annexure IV.
P.Mittal, Head EPINET, ONGC
2D Seismic EBCDIC Header
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C 1 CLIENT: OIL AND NATURAL GAS CORPORATION LIMITED. 2D SEISMIC DATA
C 2 LINE: M125-02
SURVEY: xxxxxxxxxxxxxxxx AREA:xxxxxxxxxxxxxxxxxx
C 3 SPHEROID: EVEREST75
PROJECTION:UTM-44
CM : 81
CP2: XX
C 4 FSP:
74
IS AT LAT: 11 12 18.12 N LON: 79 30 29.01 E
C 5 LSP: 1088
IS AT LAT: 11 01 26.84 N LON: 79 20 42.52 E
C 6 FCDP:
1
SP ON FCDP: 1 LCDP: 1088 SP ON LCDP: 1088
C 7 ADDITIONAL SP CDP RELATION PAIRS FOR CROOKED PROFILE (OTHERWISE BLANK)
C 8 ADDITIONAL SP CDP RELATION PAIRS FOR CROOKED PROFILE (OTHERWISE BLANK)
C 9 BLANK
C10 ACQUISITION PARAMETERS
C11 RECORDING YEAR: 2004 AGENCY:ONGC
VESSEL/PARTY:GP-29
C12 SYSTEM:DFS-IV
REC FORMAT:SEG-B
LOW/HIGHCUT: 8/128 HZ
C13 NO OF CHANNELS: 96 FOLD: 48
SOURCE: VIBROSEIS
C14 SAMPLE INTERVAL: 2MS REC LENGTH: 5000 MS
REC START TIME: 0MS
C15 SHOT INTERVAL: 100 M GROUP INTERVAL: 100 M
NEAR OFFSET: 200 M
C16 LAYOUT:SPLITSPREAD BACK CHANNELS: 72
FORWARD CHANNELS: 24
C17- C18 ENTER ADDITIONAL INFORMATION HERE
C19 BLANK
C20 PROCESSING PARAMETERS AGENCY: RCC, CHENNAI, ONGC BASIC/REPROCESSING
C21 to C35 PROCESSING STEPS
C36 PROCESSED OUTPUT STORED IN THIS TAPE:DMOSTK/MISTK/PSTM/PSDM
C37 DOMAIN:TIME/DEPTH
REC LENGTH: 4000 MS
SAMPLE INTERVAL: 4 MS
C38 ADDITIONAL INFORMATION
C39 BLANK
C40 END EBCDIC
REMARKS:
1.All textHead
fieldsEPINET,
are left justified
P.Mittal,
ONGCand numeric values are right justified as shown
2.C1 TO C6,( also C7 & C8 for Crooked Lines ) & C36 AND 37 ARE MANDATORY FOR LOADING OLD DATA
Issues for DBAs
• Multiple accounts for single user
– Unix Accounts
– Application wise Accounts
– Finder & DPDA
• LogDB, Geoframe
• SeisDB
• AssetDB
– Remote Login accounts
• Assigning privileges
– Over 300 tables
– Role based or Oracle based
– Dynamic assignment
P.Mittal, Head EPINET, ONGC
– Remote Users
Data Flow Issues
• Online replication/Synchronization yet to
be achieved
• Insert, Update, Delete Transactions
Management
• Time series data (Nlist Files)
merging/Reloading (?)
P.Mittal, Head EPINET, ONGC
Challenges
• Data aggregation
• Merging of Seismic Trace Data from Basin
servers to Corporate server
• Interface between SAP and EPINET for
transfer of Drilling and Production data
P.Mittal, Head EPINET, ONGC
Thank
You
P.Mittal, Head EPINET, ONGC