1. ONGC’s Feedback for POSC
P.K. Mittal
GM-Head EPINET Project
Oil & Natural Gas Corporation Ltd
India
P.Mittal, Head EPINET, ONGC

2. 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

3. Softwares FINDER LOGDB SEISDB DRILLDB ASSETDB GEOFRAME GEOLOGY
GEOFRAME PETROPHYSICS
DECISION POINT DATA ACCESS
P.Mittal, Head EPINET, ONGC

4. Databases & Their Integration
1. Corporate Server Dehradun
KDMIPE, IDT, GEOPIC, E&D Dte & Frontier Basin
2. Regional Server Panvel
3. Regional Server Baroda
4. Regional Server Jorhat
5. Regional Server Chennai
7. Regional Server Kolkata
Western Offshore Basin
IOGPT
Western Onshore Basin
A&AA Basin
Cauvery Basin
CBM-BPM Basin
9. Ahmedabad
Site Server
IRS
A’Bad Asset
6. Rajahmundry
Site Server
14. Nazira
Site Server
10.Mehsana
Site Server
Assam Asset
KG Basin
Rajahmundry Asset
Mehsana Asset
8. Vasudhara Site Server
17 Karaikal
Site Server
15. Agartala
Site Server
11.Ankleshwar
Site Server
Mumbai High Asset
Neelam Asset
Bassein Asset
Uran plant
Hazira plant
Tripura Asset
Karaikal Asset
Ankleshwar Asset
12. Cambay
Site Server
16. Silchar
Site Server
Cambay FB
13. Jodhpur Site Server
Cachar FB
P.Mittal, Head EPINET, ONGC
Jodhpur FB

5. 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 (Field code=’M-B-126’, Well no=’5’)
P.Mittal, Head EPINET, ONGC

6. UWI- Well Type Codes Well Type Code codes are
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

7. 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

8. On land Seismic Survey Name
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
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

9. 2D Seismic EBCDIC Header
C 1 CLIENT: OIL AND NATURAL GAS CORPORATION LIMITED. 2D SEISMIC DATA
C 2 LINE: M SURVEY: xxxxxxxxxxxxxxxx AREA:xxxxxxxxxxxxxxxxxx
C 3 SPHEROID: EVEREST PROJECTION:UTM CM : CP2: XX
C 4 FSP: IS AT LAT: N LON: E
C 5 LSP: IS AT LAT: N LON: E
C 6 FCDP: SP ON FCDP: LCDP: 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: AGENCY:ONGC VESSEL/PARTY:GP-29
C12 SYSTEM:DFS-IV REC FORMAT:SEG-B LOW/HIGHCUT: 8/128 HZ
C13 NO OF CHANNELS: FOLD: 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: 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 text fields are left justified and 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
P.Mittal, Head EPINET, ONGC

10. Issues for DBAs Multiple accounts for single user Assigning privileges
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
Remote Users
P.Mittal, Head EPINET, ONGC

11. 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

12. 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

13. Thank You
P.Mittal, Head EPINET, ONGC