presentation geopro

GeoPro GmbHBillhorner Rhrendamm 820539 Hamburg | GermanyTel: +49(0)40 303 99 576Fax: +49(0)40 303 99578email: [email protected]

World WideGeophysicalExploration

GeoPro GmbH | St.Annenufer 2 | 20457Hamburg | Germany | Tel:+49(0)40 303 99 576 | Fax:+49(0)40 303 99 578email:[email protected] | www.geopro.com

The Company GeoPro is an international operating exploration company that offers a variety of geophysical services to the oil industry. The head office and processing centre is located in Hamburg, Germany.

GeoPro employs an experienced staff of geophysicists and instru-ment engineers, who are supported by a team of qualified field technicians. The company was established in 1994, and has since concentrated on providing a range of world-wide seismic services for both off- and onshore data acquisition and processing.

Data processing, modelling, and seismic analysis are undertaken in the Hamburg office using state-of-art software. Our seismic re-search group is developing innovative seismic techniques and newhardware for the acquistion of seismic data. Our engineering group is optimizing the capacity and reliability of GeoPro's proprietary instrumentation. Among the new and developing technologies that GeoPro is currently pursuing are the development of new Ocean Bottom Seismographs (nodes) for 4D data acquisition, the imple-mentation of OBS technology with vertical hydrophone arrays in deep water and of horizontal arrays for shallow water and transition zones, 3D refraction migration and the application of PS converted waves in exploration are further issues of our interest. GeoPro is known to the industry for its ability to innovate and respond quickly to new developments, for added benefit to its clients.

GeoPro's key service is Wide Aperture Reflection/Refraction Pro-filing (WARRP). The WARRP technology developed by GeoPro can image subsurface structures by wide aperture arrays in areas with penetration problems, such as salt layers or diapirs, complicated thrust belts or basalt flows. WARRP surveys can be conducted onshore or off-shore using the Ocean Bottom Seismometers (OBS) nodes, or within transition zones. Data is recorded using SEDIS technology, which is a light-weight, robust, autonomous data digi-tizer and recorder that can continuously record six channels over a period of up to 28 days at a sampling period of 2 milliseconds. A stable temperature-controlled crystal-oscillator clock provides accu-rate timing for the recording unit, and this internal clock is calibrated against GPS-derived time before and after the recording period.

Data Acquisition Processing & Interpretation

GeoPro GmbH | Billhorner Rhrendamm 8 | 20539 Hamburg | Germany | Tel:+49(0)40 303 99 576Fax:+49(0)40 303 99 578 | email: [email protected] | www.geopro.com

Onshore, the WARRP surveys are very effective in regions where logistic diff iculties or seismic penetration problems limit the use of standard seismic instrumentation and techniques. The SEDIS instruments are extremely portable and their autonomous recording ability can reduce operational costs and provide maximum flexibility for acquisition in rugged terrains. The WARRP technique is also ideal for reconnaissance surveys. The WARRP data provide high-resolution and accurate velocity models that can be used in standard processing and in pre-stack time and depth migration.

Marine surveys using the OBS instruments (node technology) can aquire high quality compressional and shear wave data, either in connection with a standard marine reflection survey (in a piggy-back arrangement), or as a WARRP survey. The SEDIS V recording unit is at the heart of the Ocean Bottom Seismograph (OBS), which is designed to record a hydrophone and 3 geophones on the seafloor at depths down to 6000 meters. The advantage of using OBS technology is the excellent noise to signal ration and the independence of weather conditions. Also the ability to record both P and S waves using 3-component seismometers is a technical advantage of the system. OBS units also record converted PSdata that permit to develop Vs-velocity models.

GeoPro GmbH Data Acquisition Processing & Interpretation

Premises of GeoPro in the Speicherstadt Hamburg


Reference List

CLIENT BUSINESS AREA OF STUDY2nd Institute of Oceanography, China Research China

Amoco, USA Oil Company Red Sea

Alfred Wegener Institute, Germany Polar and Marine Research Germany

Baubehrde Hamburg, Germany Construction Authority Germany

B.E.B., Germany Oil Company North Germany

BP Amoco, USA Oil Company Gulf of Mexico

BP, UK Oil Company North Atlantic

BP, UK Oil Company Papua New Guinea

BP, Canada Oil Company Arctic, Beaufort Sea

British Geological Survey Government Research West of Shetland

Buried Hill, Canada Oil Company Caspian Sea

Cambridge University University Research Shetland / Faroer

Conoco, USA Oil Company Texas, USA

CSA, Ireland Natural Resources Company North Atlantic Ocean

Devon (formaly OceanEnergy), USA Oil and Natural Gas Company Gulf of Suez

Deminex, Germany Oil Company Gulf of Suez

DEPA, Greece Gas Authority Greece

Dublin University College, Ireland Geology Department North Atlantic Ocean

Electricity Authority of Cyprus Power Supply Authority Cyprus

ENI, Italy Oil Exploration Australia

Electricity Authority of Cyprus Power Supply Authority Cyprus

Enterprise Oil, England Oil Company South Italy

European Union Government Research Nisyros Volcano, Greece

European Union, SEAHELLARC Government Research Mediterranean Sea

FINA, Italia Oil Company South Italy


Reference List(continued)

CLIENT BUSINESS AREA OF STUDYFina, UK Oil Company North AtlanticFusion Oil, Australia Oil Company AustraliaGEMS, Belgium International Research Company Kenya

GEMS, Belgium International Research Company Nigeria

GEMS, Belgium International Research Company South AfricaGEMS, Belgium International Research Company Surinam

Geological Survey of Cyprus Government Research CyprusGeological Survey of Greece Government Research GreeceGeological Survey of Ireland Government Research IrelandGeoskopio, Greece Geotechnical Research Greece

German Geophysical Society, Germany Government Research Marmara Sea, Turkey

German Navy Government Authority Germany

GKSS, Germany Research Centre Germany

GX Corporation, Texas Seismic Technology Gulf of Mexico

Hamburger Wasserwerke Water Supply Organization Germany

Hamburg University, Germany Geophysics Institute Iceland

IMAR, Ireland Survey Contractors IndiaInstitute of Geodynamics Government Research Saronikos Gulf, GreeceInter Oil, Australia Oil Company Australia, Papua New GuineaKampfmittelrumdienst, Hamburg Fire Department, Germany UXO Detection Authority Germany

Kiel University, Germany Geological Sciences Institute Baltic Sea

Lorax Consultores, Mexico Enviromental Studies Mexico

MAVEG, Germany Equipment Consultation Company Germany

MIM, Australia Oil Company Papua New Guinea

Mobil Oil North Sea Ltd. Oil Company North Sea, North AtlanticMobil Oil, USA Oil Company Peru


Reference List(continued)

CLIENT BUSINESS AREA OF STUDYMobil Oil, Norway Oil Company Barents Sea

Mauritius Oceanographic Inst Government Research Central Indian Ocean

Naples University, Italy Physical Sciences Department Southern Italy

National Observatory of Athens Geodynamics Institute Greece

NCMR Athens Government Research Greece

Nestor Institute, Greece Physics Research Greece

NGRI Government Research India

NIOC, Iran Oil Company Iran

Novus, Oman Oil Company Oman

Osservatorio Vesuvio, Italia Government Research Gulf of Naples, Italy

OETR, Canada Government Research Nova Scotia, CanadaPremier Oil, UK, Indonesia, Pakistan Oil Company India

Public Petroleum Corporation of Greece Oil Company Western Greece

Roc Oil, Australia Oil Company AustraliaRWE Dea Hamburg Oil Company Iran

Saga, Norway Oil Company North Atlantic

Santos, Australia Natural Gas Company Australia

Shell, Netherlands Oil Company North Atlantic

Shell, EPE, England Organizational Development Company England

Southampton University Oceanography Centre Egypt, Black Sea

Svitzer, UK Exploration Company Central Indian Ocean

Trieste University, Italy Geophysical and Oceanography Institute Italy

Umweltbehrde, Hamburg Environmental Authority GermanyUniversity of Bristol, England Government Research Montserrat, AntiguaUniversity of Texas, Austin Government Research USAWesternGeco, UK Government Research AngolaWTD71, Kiel Government Research Germany


SEDIS V is a lightweight (1.5 Kg) seismic recorder offering various options for seismic surveys, namely Wide Aperture Reflection / Refraction Seismic Profiling (WARRP), passive seismic studies, and conventional reflection seismic surveys.The instrument can be used offshore (inte-grated in an Ocean Bottom Seismograph (OBS) or as a stand-alone seismic unit on-shore. It is a perfect tool to obtain accurate seismic data in 2D and 3D. It can record continuously for 25 days on flash memory. Timing is recorded by a GPS receiver and it has an inbuilt quartz clock.

Main-processor Processor: 200 MHz ARM9 CPU Onboard memory: 64 Mbytes SDRAM Data Storage Interface: SD Card, USB Storage Devices Communication Interfaces: LAN, WLAN, Bluetooth, Serial Port Variable sampling rate

Input Channels 6 differential analogue inputs Input signal range +/- 4.5V Overvoltage protection +/- 40V

onshore offshore

SEDIS VA Compact Digital Recorder for Seismic Surveys


GPS Unit Trimble embedded GPS receiver SveeSix-CM3

Compass module Vector 2X, 2-axis compass

(2 accuracy, 1 resolution) Temporary recording possible

Power supply unit Voltage: 9-36 VDC Power consumption:

- standby ~ 1.3 W- 1.8 W for 4 channels- 2.2 W for 6 channels

Data processing LINUX platform

Data storage up to 32 GB SD flash memory card

Aquisition unit

Analogue input,

pre-amplifier, filter

24 bits A/D converters

Digital Filters

Aquisition unit

Analogue input,

pre-amplifier, filter

24 bits A/D converters

Digital Filters

Main processor unit

Intel X Scale PXA 255

Main processor unit

Intel X Scale PXA 255

GPS unitGPS unit

Power supply unitPower supply unit

DataUp to 32 GB SD flash

memory card

DataUp to 32 GB SD flash

memory card

Digitizer High performance Delta-Sigma A/D converter CS5321 on each channel Sampling rates: 62.5, 125, 250, 500 sps Digital filter CS5322, cut-off frequencies: 25.7 Hz, 51.5 Hz, 102.9 Hz, 205.9 Hz Dynamic range: 120 dB @ 250 Hz sample rate Clock oscillator: Mxa 37/8 1*10-8 Temperature measurement on quartz Recording of supply battery voltage


Data acquisition

Analogue inputs 4 differential channels

Supported sampling intervals* 0,25; 0,5;1ms 1000 ms

Power consumption ~1.65 W @ 15 MHz~ 1.85 W @ 166 MHz

Size and weight 133 * 105 * 85 mm1.0 kg

ADC board specificationsA/D converter Cirrus Logic CS5371A Digital filter Cirrus Logic CS5376AAmplifiers 2x CS3301 Geophone Amplifier

2x CS3302 Hydrophone Amplifier

GPS Unit Trimble embedded GPS receiver SveeSix-CM3 with power-off control

Clock oscillator: Mxa 37/8 1*10-8

Built-in sensors 1 x Compass Module, 1 x Battery Level Sensor, 1 x Temperature Sensor

Embedded Linux PC specificationsMain processor 200 MHz ARM9 with scalable working freq Working modes Data acqusition @ 15 Mhz

Data backup @ 166 MhzData storage interface SDHC Card USB-Stick, SCSIPower supply Voltage: 9-36 VDCData storage 32 Gb SDHC Card

2x USB-Stick of 64Gb eachOperating temperature -40 C to +70 C

* For 1 msec sampling interval only 3 channels can be used.

SEDIS VIA Compact Digital Recorder for Seismic Surveys


Glass sphere housing 17 withstanding pressure to 6000m water depth

Weight: 30 kg, with anchor: 47 kg 6 channel availability with recording

choice of 1 to 6 - 3 C-geophones gimbal mounted- 1 deep-sea hydrophone- Optional 6-channel hydrophone

array possible 120 dB dynamic range, 24 Bit A/D

converter Variable sampling rate Data download wireless Acoustic and time release Integrated compass Located by radio transmission and Light

indicator Rechargeable Batteries Nickel-Metal

Hydride, Type VH D 9500 or Lithium-Polymer

Single OBSOcean Bottom Seismograph Seismic Node

Arrangement of OBS Components


Single OBS with Vertical and Horizontal Streamer

For shallow water operations transitional zones, a hydrophone streamer with 6 channels was developed, as presented below.

OBS with horizontal streamerHorizontal Streamer for Transitional Zones

Vertical Streamer for Deep Water OperationsFor deep water operations we developed a vertical streamer with 6 channels that can be connected to the Ocean Bottom Seismograph (OBS). The 6 hydrophone channels are equidistantly distributed along the streamer. Separation of the channels is in the order of 25 to 50 meters. Other separation offsets are possible, depending on the requirements of the project. Recording examples are presented below

Example of a Common Station Gather


Double OBSOcean Bottom Seismograph for long time recording

GeoPro's double-sphere Ocean Bottom Seismograph (OBS) has the capacity to record up to one year continuously, depending on battery configuration and sensor type. It is applied in micro-zonation studies for engineering purposes, in seismicity surveys and active / passive tomography.

It can also be applied in oil field services for reservoir monitoring. Recording is obtained by a SEDIS V or VI recorder.

Sensors can be variable, depending on the problem to be addressed.

Battery Types and performance:- Procell D-size MN 1300 (LR20) 1.5 V ~ 70 days- Lithium-Polymer Rechargeable ~ 70 days- Lithium-Thionyl Chloride ~ 400 days with SEDIS VI

For Single OBS 40% of performanceas given above

Version for one years deployment


Buoy for Seismicity and Tsunami Telemetry

GeoPro's second generation permanent marine seismological station has a new type of buoy build of yellow Polyethylene with 8mm thickness which has a buoyancy of 2.4t.It contains the SEDIS seismic processor unit, the radio transmitter and modem and the power supply of the system. Four 12V gel batteries provide the station with the necessary power which is renewed by solar panels.The robust construction requires minimum of maintenance and the station can be serviced also by a small boat since the instrumental container is easy to remove and support.The broadband sensor is placed at the sea bottom in a glass sphere housing and can be removed from the sea floor without having to lift the buoy. The system can be also used for meteorological, oceanographic and Tsunami observations.

Technical specifications: Dimensions (w*l*h):

1.8m * 1.8m * 1.3m(~ 4mwith antenna and mast)

Weight: < 500kg Buoyancy: 2400kg Power consumption: ~6W Data Transmission Speed:

57.6 kbaud/ 7200 bytes/s Data Transmission protocol:

XMODEM Seismic Data Acquisition:

variable Sampling Rates andup to 6 channels


GeoProGeophysical Applications

Node Technology

Deployment and Recovery of an Ocean Bottom Seismograph (OBS)

Microseismicity & Seismic Tomography

Velocity Modeling and Migration

Microseismicity from an on/offshore local array in SW Greece (left). P- and S-wave velocity distribut-ion at 2, 4, 8 and 12 km depth after a 3D simultaneous inversion (FP6 SEAHELLARC Project).

Sub-Basalt Mapping

Mapping of a Salt Dome

Mapping of a Thrust Belt

Velocity ModelingExamples of Velocity Models with WARRP (wide Azimuth data)


Velocity Model Shetland Basin

Velocity Model Barents Sea

Velocity Model Western Greece


Deep seismicity, extending to 100 Km depth is linked to the subduction of the oceanic Ionian lithosphere below the

Aegean microplate.

Monitoring seismicity with local on/offshore seismic networks is an important tool for seismic hazard estimation and preparation of microzonation maps for engineering studies. The distribution of hypocenters allows the identification of active faults and their mechanism, and help to understand active tectonic process.

10 local on/offshore seismic arrays using the SEDIS recorder, Cyprus - East Mediterranean Sea

3D-distribution of seismicity indicating the position of active faults Recorded seismicity correlates with active faults

associated with large scale convergence of the Anatolian and the African plates.

Distribution of Seismicity including the Paphos 95/96 and the Troodos 98 Earthquakes

Correlation of Seismicity with Active Faults in the Saronikos gulf, Athens, Greece

3D distribution of seismicity indicating the subduction of the Ionian lithosphere

On/offshore seismic array consisting of 43 3-C stand-alone digital stations using the SEDIS recorder,

Saronikos gulf Athens - Greece

Aegina

Pendeli Mt.

Immitos Mt.

Parnis Mt.

Athens

SARONIKOS GULF

CORINTHIAKOS GULF

CORINTHIA

ATTICA

Megara

Methana

Angistri

Epidaurus

Salamis

EVIA

Corinth

OroposThiva

Sousak iIsth mus

Aegean Sea

Poros

Loutraki

Spata

Pelop onnese

(Fili)

Passive Seismic Monitoring for engineering and velocity tomography hydrocarbon exploration dExamples from Eastern Mediterranean Sea


3D Potential Field Modeling

GeoPro has developed a gravity and magnetic modeling tool that can handle models of any complexity. It is based on a full 3-D grid approach with the model space being discriminated by rectangular prisms of constant size. Geological or geophysical information can easily be incorporated into the model. GeoPro offers acquisition and interpretation of marine, land and airborn gravity and magnetic data.

Definition of Initial ModelA set of main surfaces is imported into a 3-D grid. The algorithm used allows a time efficient develop-ment of complex models.The first run computation of the potential field presented below requires 5 minutes on a Pentium II 400, and decreases to 1-2 minutes for subsequent model modifications.

Vertical model slices with observed and calculated potential fields along different profiles and a simple view of the model are shown.


3D Potential Field Modeling3D Density Model Cyprus

The modeling result can be pre-sented in many forms, e.g. as 3-D volumes, a sequence of slices in arbitrary directions, isosurfaces or 3-D displays of the main inter-faces.

Observed and Calculated Gravity Fields

Final presentation of the main surfaces

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