1. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE Geophysical Data Systems Ltd. Address:117198, RUSSIA, Moscow, Leninsky avn. 113/1, Park Place Moscow, office E-321 Phone:+7 (495) 234 27 94Fax:+7 (495) 956 52 37E-mail: info@gds.ru Geophysical Data Systems Ltd.

2. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE Geophysical Data Systems Ltd. W E P R E S E N T Address:117198, RUSSIA, Moscow, Leninsky avn. 113/1, Park Place Moscow, office E-321 Phone:+7 (495) 234 27 94Fax:+7 (495) 956 52 37E-mail: info@gds.ru Q UANTITATIVE Q UALITY C ONTROL of S EISMIC D ATA ON BASIS OF WINDOWS ® SOFTWARE PACKAGE S E I S W I N - Q C

3. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE FIELD OPERATOR (Seismic Crew) CUSTOMER (Oil Company) CONTROL of QUALITY CRITERIAS SPECIFIED IN CONTRACT BY CUSTOMER CRITERIAS of SPOILAGE CONTROL UNCONDITIONAL : Inactive channels Lack of shot break Short records and so on… CONDITIONAL : Attributes and integrated quality coefficient calculation CONTROL of FIELD SEISMIC DATA QUALITY ON STAGE OF THEIR ACCEPTANCE FOR NEXT STAGE of PROCESSING SUPERVISOR

4. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE SOME ASPECTS of QC CALCULATION SOME ASPECTS of QC CALCULATION

5. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE COMPONENTS of SEISMIC DATA QUALITY TECHNICALSEISMO-GEOLOGICALMETHODICAL STATE of : Seismic registrator; Seismic registrator; Vibrators; Vibrators; Geophone; Geophone; Seismic cable; Seismic cable; and so on… and so on… INFLUENCE of : Upper part of the section; Upper part of the section; Deep conditions; Deep conditions; Tectonic conditions; Tectonic conditions; and so on… and so on… PARAMETERS of : Lay-out; Lay-out; Sourse; Sourse; Geophone array; Geophone array; and so on… and so on…

6. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE A T T R I B U T I E S 1.SPECTRAL attributes of seismic records: - dominant frequency (MSP); - low cut frequency (LCUT); - high cut frequency (HCUT); - spectral width (WSP) 2.Signal/noise ratio 3.Velocity of direct (V D ) or refraction (V R ) wave, as an upper part of the geological section characterization 4.Relative energy of reflections 5.Integrated quality coefficient of seismic record

7. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE AMPLITUDE-FREQUENCY ATTRIBUTS MSP- dominant frequency ; LCUT- low cut frequency; HCUT- high cut frequency; WSP- spectral width

8. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE SIGNAL/NOISE RATIO MEASUREMENT S/N - signal/niose ratio - normalized CCF S/NS/N

9. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE DIRECT WAVE VELOCITY (V D ) MEASUREMENT x – distance between seismic traces t – time shift by the CCF

10. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE INTEGRATED QUALITY COEFFICIENT is a FUNCTION of a few main ATTRIBUTES SN- signal/noise ratio; WSP- spectrum width; MSP- dominant frequency; E- reflections energy; E avg - average reflection energy; k- calibrating coefficient. where QC = SN WSP 70 MSP 35 E E avg +++ 0.7 + + + k Signal/Noise measurement Spectral attributes measurement Relative energy measurement

11. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE QC DEPENDENCE on ATTRIBUTE VALUE QC 200 % Standard quality 1-parameter changed 4- parameter changed 100 % 25 % Good quality Excellent quality Bad quality Spoilage quality Parameter value relative to standart

12. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE ILLUSRATIONS of QC PROCESS ILLUSRATIONS of QC PROCESS

13. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE FLOW CHART of QC process INPUT, GEOMETRY CONTROL, LAY-OUT & DATA VISUALISATION WINDOWS & PARAMETERS DEFINITION ATTRIBUTES & INTEGRATED QC CALCULATION REPORT PRINT OUT INTERACTIVE ATTRIBUTES & QC VISUALISATION

14. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE DATA INPUT, QUALITY & GEOMETRY VISUAL CONTROL

15. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE ANALYSIS PARAMETERS SETTING

16. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE ATTRIBUTES & QC CALCULATION RECORDS ATTRIBUTE SHEET STRUCTURE ENERGY attributes SRECTRAL attributes SIGNAL/NOISE ratio INTEGRATED QC

17. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE STATISTICAL CHARACTERISTICS used for QC ESTIMATION

18. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE QC-COEFFICIENT VISUALISATION along 2D seismic line on map Low quality 2D line position Low quality seismic record Y X High quality Seismic record

19. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE SEISMIC RECORD VISUALISATION Low quality seismic record High quality seismic record

20. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE Low quality seismic record High quality Seismic record High quality Low quality QC-COLOR VISUALISATION on the area of 3D survey

21. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE INTERACTIVE BOND PROGRAMM WINDOWS

22. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE SELECTION of LOW QUALITY RECORDS using STATISTICAL BAR CHART

23. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE SELECTION of HIGH QUALITY RECORDS using STATISTICAL BAR CHART

24. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE SUMMARY of STATISTICAL DATA for 2-D Line/ 3-D area

25. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE LET US PRESENT SOME RESULTS ON THE BASE MAP LET US PRESENT SOME RESULTS ON THE BASE MAP

26. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE DOMINANT FREQUNCY (MSP attribute) MAP

27. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE SIGNAL/NOISE RATIO (S/N-attribute) MAP

28. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE REPLACEMENT VELOCITY MAP

29. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE INTEGRATED QC MAP

30. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE P R O D U C T I V I T Y KIND of PROCESSING QC-attributes calculation for 2-D line QC-attributes calculation for 3-D line 2D control Stack : amplitude recovery filtering static & NMO correction migration visualisation 3D - strip Stack INPUT DATA VOLUME 500 records by 240 channels Daily portion: 500 records by 1500 channels 10 000 records by 1500 channels: 200 sq. км 500 records by 240 channels 500 records by 1500 channels: one 3-D stripe TIME EXPENDITURE 10 min 1 hour less then 20 hour 15 min 1,5 hour

31. Geophysical Data Systems Ltd. S E I S W I N O N B A S I S O F WINDOWS ® SOFTWARE PACKAGE Address:117198, RUSSIA, Moscow, Leninsky avn. 113/1, Park Place Moscow, office E-321 Phone:+7 (495) 234 27 94Fax:+7 (495) 956 52 37E-mail: info@gds.ru THANKS FOR YOUR ATTENTION ! PLEASE, DONT FORGET TO TAKE OUR FAIR BROCHURE TO CONTACT TO US LATER…