sea geophysical studies

JSC «Rusgeology»

Khersonskaya st. 43, bld. 3, Moscow, RF 117246E-mail: info@rusgeology.ruT: +7 (495) 988-58-07, +7 (495) 988-58-09F: +7 (499 ) 271-97-60

www.rosgeo.com

The Holding has a number of specialised companies with their own fl eet and know-how allowing them to deliver the most complex surveys in various latitudes: Sevmorgeo, Dalmorneftegeofi zika, Sevmorneftegeofi zika, Yuzhmorgeologiya, Polar Marine Geosurvey Expedition, Soyuzmorgeo, Arctic Marine Engineering-Geological Expeditions.The companies conduct the full range of offshore geological-geophysical works offshore, as well as in the World Ocean, including on normal profi les, 2D & 3D seismic surveys in transit zones, seismic-acoustic surveys, soil vapour testing,

gravimetric and magnetic surveys, electromagnetic surveys, as well as processing and interpretation of the gathered geophysical data.Deep-sea drilling is a special fi eld of activity for which the Holding companies have developed and are still refi ning methodologies and engineering facilities.The Holding companies perform engineering and geological surveys for offshore facility construction and in transit zones, deliver geotechnical expertise of all scales, as well as specialised hydrometeorological surveys, and develop technologies and equipment for geophysical exploration in the World Ocean.

Offshore operations –one of Rosgeologia’s core activities

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Rosgeologia companies perform the full range of services, associated with organisation and performance of comprehensive marine geophysical works, processing and geological interpretation of the gathered geophysical data:Rosgeologia possesses modern seismic survey vessels with competent and trained crews. Survey vessel equipment allows them to carry out the full range of geophysical surveys, including gravity and magnetic prospecting, 2D and 3D seismic surveys.The Holding companies operate and discover offshore oil and gas fi elds on the Far East shelf, East-Arctic and West-Arctic Russian shelves, as well as in various offshore areas of the World Ocean.

2-D and 3-D seismic worksin transit zonesA TRANSIT ZONE IS A SHALLOW TRACT OF WATER IMMEDIATELY ADJACENT TO THE COASTLINE, INACCESSIBLE FOR BOTH SEA AND LAND GEOPHYSICAL SURVEYS.UP TO 20% (24.4 BN T OF FUEL OIL EQUIVALENT) OF THE HYDROCARBON DEPOSITS ARE LOCATED IN THE TRANSIT ZONES OF THE RUSSIAN FEDERATION,(95% OF THESE ARE LOCATED IN THE TRANSIT ZONES OF ARCTIC SEAS).

Rosgeologia companies conduct geophysical activities for oil and gas in transit zones and under the conditions of marginal shallow water (inundated-marshy areas). One of Rosgeologia’s marine companies – Sevmorgeo, the leader in shallow water surveys in Russia, was the fi rst to apply the advanced hardware-methodological complex (BOX radiotelemetry seismic data acquisition system produced by Fairfield Ind.) for seismic surveys in shallow water. CMP refl ection seismic surveys in 2D and 3D modifi cations have been performed in the Caspian and the Volga, along the coast of the Pechora Sea and Kara Sea (approximately 8,500 lkm and 1,000 sq. km) and in many other offshore areas in Russia and abroad.The company has conducted research, e.g., in the offshore areas of the Gulf of Ob and Taz Bay, which made it possible, on the

basis of a closed network of regional lines joining the territories of the Yamal and Gydan peninsulas split by the bays, to fi nalise the global geological maps of the Northern part of the West-Siberian megafi eld, and has provided more reliable resource estimates of the region’s hydrocarbon potential. In the area of the Ob-Taz shallow waters, on the basis of the results of the surveys conducted, localised forecast gas resources are estimated in a volume of over 5 bn cubic metres. As a result of regional seismic surveys in the offshore area of the Khalmyer Bay and the southern part of the Kara Sea shelf, a seismic structural model has been created of the Paleozoic and Mesozoic-Cainozoic shelf complexes of the given area and the adjacent ground. Forecast resources of D1l category hydrocarbon gas have been assessed at 2.5 bn cubic metres.

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Since 2010, JSC Sevmorgeo has used the Z700 seismic data collection system made by Fairfield. Having such a fl exible structure, the system of bottom stations is free from defects associated with the presence of a fl oating telemetering buoy and enjoys a number of other advantages. The system was used in the operations on the Khalmyer Bay, in Turkmenistan for offshore CMP refl ection-2D-4С seismic survey works.Currently, JSC Sevmorgeo has 1,500 similar stations and is performing works on the shelf of the Republic of Ecuador.

Equipment and observation system parameters

Observation system: Fixed point receiver arrangement ejected by a migrating source array.

OBSERVATION SYSTEM PARAMETERS:

Reception interval ........50m Number of channels ...4,000Fold ............................................96

Source array BOLT 2800 L L-X volume – 12.2 l.

Projects delivered in the transition zone Pechora Sea transition zone

Caspian Sea transition zone

Volga river transition zone

Kara Sea transition zone

APPROX. 10,000 LKM 2D AND APPROX. 2,000 SQ. KM 3D SURVEYS PERFORMED

Results of the works: a reserve increment and forecast resource localisation by category С2 – 200 bn cubic metres (Antipayutinskoe fi eld)and 450 bn cubic metres of category D1l resources (Yurkharovskoe fi eld)

LOCALISED FORECAST GAS RESOURCES DETECTED DURING WORKS IN 2004-2010 ARE ESTIMATED AT OVER 7 BN CUBIC METRES.

Comprehensive geological and geophysical surveys with a national grid of normal profi les

Owing to the extensive combination of geophysical measurements according to the methodology unique in the country, during processing of the normal profi le data of various seismic survey modifi cations (refl ection survey, refraction survey, deep seismic sounding, multicomponent measurements), shipboard magnetometer surveys, shipboard gravity measurements, as well as regional geochemical prospecting are integrated.Since 1995, the comprehensive methods has been used to fi nalise normal profi les 1-АР, 2-АР, 3- АР, 4-АР on the West-Arctic shelf, as well as 2-DV-М & 1-ОМ lines in the Sea of Okhotsk region. The Programme for the East-Arctic shelf was launched by works on 5-АР line in the East-Siberian sea. The total length of the created calibration line grid has exceeded 8,000 km.

As a result of the works in the Barents-Kara region, a joint depth model of the geological structure of the Earth’s crust was developed that has allowed the hydrocarbon raw materials resources of the RF West-Arctic shelf to be clarifi ed and the main spheres of geological prospecting works to be planned for the short and medium terms.In the Sea of Okhotsk and the East Siberian Sea new data have been obtained of the utmost importance for validation of the outer limits of the Russian Federation’s continental shelf.Extensive geological and geophysical data on the continental shelf’s deep structure gathered during geological exploration works offer an opportunity for enhancing the hydrocarbon saturation forecast methodology.

THE COMPANY HAS DEVELOPED CORE ELEMENTS OF THE OFFSHORE, SPATIAL, MULTICOMPONENT, DEEP SEISMIC SOUNDING TECHNIQUE AND HAS CREATED A HARDWARE-METHODOLOGICAL COMPLEX ON THE BASIS OF AUTONOMOUS BOTTOM THREE-COMPONENT SEISMIC STATIONS.

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SEISMIC WORKS

continuous seismoacoustic shooting – for studying the upper part of the sedimentary cover;

2D CMP refl ection survey seismic works for clarifying the sedimentary cover section at full capacity and the consolidated crust section at a depth of at least 8–10 km;

2D refraction survey, deep seismic sounding seismic works for clarifying the lower part of the sedimentary cover section and the consolidated crust section at a depth to the Mohorovicic discontinuity in the 3-component variant.

GRAVITY MAGNETOMETRIC MEASUREMENTS

above-water gravity meter measurements for integrated interpretation, defi nition of the upper boundary foundation depth, identifi cation of plicative and disjunctive structures, and tracking of the boundaries of the rocks of different formations;

hydromagnetometric surveys for identifying the primary structures of the base plate, large disjunctive forms and magmatic formation in the sedimentary cover Soil vapour testing;

seafl oor sampling and soil vapour surveys for making geological interpretation more reliable and improving the hydrocarbon content forecast.

Marine companies of Rosgeologia perform engineering-geological surveys of petroleum bearing reservoirs, prepare decisions for locating offshore drilling rigs, make on-site surveys for organising and drilling deep depth exploration oil and gas wells, carry out offshore engineering and geological research for underwater pipeline laying, exploration of sites intended for construction and arrangement of coast-sea communications (terminals, portals, dams, barrages), etc.Geotechnical and survey geophysical works are carried out for both Russian and foreign customers in various parts of the World Ocean.

The company has its own engineering fl eet. For example, the AMIGE fl eet consists of 3 specialised vessels, two of which are assigned to exploratory boring and geotechnical works and the third - primarily for geophysical surveys. Various fl oating craft are available for engineering surveys in shallow waters. In transit areas modern small boats operate, including aircushion vessels, with crews consisting of competent and specially trained professionals. The available equipment allows the full range of seismic 2D/3D surveys to be performed in transit areas.

Composition of the geological and geophysical survey complex for creating the grid of marine calibration lines:

Geological and engineering exploration

ROSGEOLOGIA COMPANIES PERFORM VARIOUS TYPES OF ENGINEERING SURVEY OFFSHORE, AS WELL AS IN TRANSIT ZONES:

engineering-geological;

engineering-geophysical;

engineering geodetic;

engineering-hydrometeorological.

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Active exploration of the shelf, construction of ports and hydroengineering structures in areas of previous military actions promote active use of geophysical techniques for resolving safety matters and environmental conservation during engineering surveys. YMG develops technologies for seeking unexploded ordnance (UXO) on the basis of sensitive magnetometer surveys. The technique we have developed on the basis of mapped anomalies allows repositories of bottommines, shells, air bombs, anchors, metal work and reinforced concrete structures, sunken ships with a maximum size of 1 m and a minimum magnetic mass about 20 kg to be pinpointed precisely.

DURING RESOLUTION OF ENGINEERING-GEOLOGICAL PROBLEMS, USE IS ALWAYS MADE OF AN INTERCONNECTED, INTEGRATED APPROACH USING MODERN TECHNOLOGIES AND TECHNICAL EQUIPMENT. ENGINEERING AND GEOLOGICAL EQUIPMENT

3D-seismic survey – 2 Floating geological laboratory – 1

2D-seismic survey – 8 Technical watercraft – 2

Scientifi c research – 8 Boats – 3

Drilling – 3 Motor boats – 1

Geological and Engineering – 2 Multi-purpose module – 1

Echo survey – 2 Transport unit – 1

Shooting vessel – 1

Seismic FleetThe Rosgeologia fl eet consists of 35 vessels performing the following activities:

The Rosgeologia fl eet provides an average annual performance in the Northern latitudes of up to 2,500 km2 of 3D seismic surveys, as well as up to 50,000 lkm of 2D seismic surveys

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DMNGThe Department of offshore DMNG operations possesses modern seismic survey vessels. The survey vessels’ equipment allows the full range of geophysical surveys including gravity and magnetic prospecting, 2D/3D seismic surveys to be carried out.

3D seismic vessel Orient Explorer

2D seismic vessels Zephir 1 and Academic Fersman

Vessel-source Iskatel 4

YMGYMG currently possesses 3 research vessels fi tted with modern exploration equipment allowing for effective accomplishment of surveys in virtually any part of the World Ocean.Gelendjik, uzhmorgeologiya, Akvamarin – versatile and multipurpose research vessels.

AMIGEResearch vessel Bavenit. Ice-class vessel Project P-2790, with DYNPOS-2 classifi cation, which is currently one of the best equipped engineering-geological vessels in the world.Research vessel Kimberlit. This vessel is designed for drilling exploratory wells and performing geoengineering works. The survey area is unlimited.

Currently, SMNG has a special purpose fl eet consisting of four deep-sea research vessels and two shallow-water vessels. Deep-sea vessels have a reinforced ice class, and shallow-sea ones – ice class.

DEEP-SEA RESEARCH VESSELS: research vessel Academic Nemchinov (3D vessel); research vessel Academic Shatskiy (2D vessel); research vessel Academic Lazarev (2D vessel); research vessel Geo Arctic (2D vessel).

SHALLOW-WATER RESEARCH VESSELS: research vessel Professor Ryabinkin (2D vessel); catamaran Iskatel-5 (2D vessel).

Shallow-water research vessels can also operate in deep sea and at depths of up to 5 metres.

Research vessel Kern. Multitask vessel designed for a complex of engineering surveys. It is equipped with the complete set of instruments for seismoacoustic shooting, side-view submarine sound ranging, multipath acoustic sounding, magnetometry and phreatic sampling.

THE COMPANIES ALSO POSSESS A NUMBER OF LOW-TONNAGE VESSELS, FLOATING AND SUBMERGING RESEARCH FACILITIES OF IN-HOUSE PRODUCTION.

For more specifi cations of the vessels, see the websiterosgeo.com.

The capacities of Rosgeologia processing and computing centres situated in Moscow, Gelendzhik, Murmansk, St Petersburg and Yuzhno-Sakhalinsk suffi ce almost to cover the full demand for data processing and interpretation for all planned 2D and 3D seismic works in the Russian Federation

up to 2025. In addition, the Processing and computing centre’s free capacity makes it possible to process up to an additional 1 m lkm for onshore 2D seismic surveys up to 2025. Foreign representations of the Processing and computing centre: Oslo, Singapore, Mumbai.

COMPUTING CENTRE CAPACITY (LKM (KM2)/YEAR) 2D 3D

JSC Dalmorneftegeofi zika 250,000 17,000

JSC Sevmorneftegeofi zika 100,000 3,000

GNTs FGUGP Yuzhmorgeologiya 25,000 1,000

JSC Sevmorgeo 15,000 0

TOTAL 390,000 21,000

Geophysical data processing and interpretation

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Works on validation the outer limits of the Russian Federation’s continental shelf

In the Arctic Ocean, in the area of Mendeleev Rise and other areas of Central-Arctic rises, comprehensive geological-geophysical surveys have been conducted, including seismic operations (CMP refl ection surveys, refl ection survey-refraction survey soundings, DSS soundings), as well as geological studies of the bottom of the Arctic Ocean.During the expedition, seismic lines were developed by the CDP seismic refl ection method with a streamer cable with a total length of over 4,500 lkm. For the purpose of studying subsurface velocity distribution, the complex was supplemented by the seismic soundings seismic-refl ection method – seismic-refraction method.The deep-sea crust architecture from the Mendeleev Rise to the Chukchi Plateau

is examined by autonomous seafl oor boomerang stations, for the fi rst time in such northern latitudes (circa 770 n.l.) a seismic line refraction survey – deep seismic sounding over 480 lkm has been performed.Geological investigations performed during the expedition are of exceptional interest. Segments of the Ocean bed outlined on the basis of the preceding work materials were surveyed in detail by submersible craft for the purpose of choosing phreatic sampling stations and deep-sea drilling sites.In one of the chosen sampling loops (830 n.l.), deep-sea drilling to a depth of 1.95 m in 2,600 m of water depth has been carried out. A bedrock core sample was extracted that may serve as one piece of evidence of the continental nature of the Mendeleev Rise.

In total during the work more than 20 stations of complex (grab bucket, drag-bucket, tube) sea-bed samplings were carried out.Many of the organisational and technological solutions at high latitude were employed for the fi rst time in Russia and the world:

For the fi rst time, deep seismic sounding 2D-surveys with multicomponent autonomous seafl oor boomerang seismic stations have been performed in the Arctic Ocean.

For the fi rst time, drilling with the GBU-2/4000L deep-sea drilling rig for seafl oor deployment, made by JSC Sevmorgeo, has been carried out in the Arctic Ocean.

Underwater drilling sites have been detected using a manned submersible vehicle – research submarine – equipped with a high-resolution seismoacoustic profi lograph, side-scan sonar and television equipment.

For the fi rst time, such a great volume of bottom rock material (BRM) was collected in the course of a single expedition. The BRM samples collected during the Arctica-2012 expedition totalled 21,731 in number.

GEOLOGICAL AND GEOPHYSICAL RESEARCH ON THE PROBLEM OF THE OUTER LIMITS OF THE CONTINENTAL SHELF IN THE ARCTIC OCEAN ARE CONDUCTED IN COMPLIANCE WITH A RESOLUTION OF THE RUSSIAN GOVERNMENT.

The new geological and geophysical data collected during the fi eld operations on the Mendeleev Rise provided proof of its continental nature.

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