GEOCHEMICAL PROSPECTING IN OIL & GAS EXPLORATION INNOVATIVE EXPLORATION OF OIL AND GAS FOR MORE THAN...

GEOCHEMICAL PROSPECTINGIN OIL & GAS EXPLORATION

INNOVATIVE EXPLORATION OF OIL AND GAS FOR MORE THAN 15 YEARS

YUGRANEFTEGASResearch Center

http://www.geochemistry.ru

Yugraneftegas Research Center is a service company offering a wide range of services and solutions in oil and gas industry. The Company has been in the market since 1998.

Customers of the Company include the leading enterprises of the Russian Federation – Gazprom, Rosneft, Lukoil and a number of state institutions.

Presentation Outline: What is Geo-chemical prospecting?

How our Geo-chem surveys help in various stages of

hydrocarbon Exploration

Sampling methods & Laboratory investigations/analysis

Cluster Analysis & Geochemical Play Model

Integration and Interpretation of studies

Some successful case histories

Our credentials


What is Geochemical prospecting?

Geochemical prospecting is an innovative and cost effective

technology which incorporates analyses of adsorbed gases of

subsoil rock samples, gas concentration anomalies as well as

changes in surface gas compositional effects in hydrocarbon

prospective areas.The manifested anomalies vis-à-vis background effects are

mapped to bring out anomalous areas increasing the

probability of success in hydrocarbon discovery.


How our Geo-Chem studies help in various stages:

Frontier Basinal areas:

Reduce the risk of acquiring Seismic data in non-productive parts

To delineate the focus areas for further seismic data acquisition

Through Isotopic analysis , understand Maturity of basin /possible migration paths

Exploration stage :

To know if the delineated prospect is adequately charged

To validate and evaluate concentration clusters within the exploration area

Optimize seismic data acquisition

Play models and refinements:

Integration with Seismic data Play concepts in understanding the structural models drawn vis-à-vis

Geochemical anomalies observed Isotopic studies to aid sourcing of hydrocarbons –thus to evaluate hydrocarbon

path ways


Pre-Survey Designing 1. Obtaining geographic boundaries/block coordinates from the Clients.

2. Geologic mapping of the area on topographic maps.

3. Geomorphological survey of the block area.

4. Drawing the design of field work integrating the Satellite Remote sensing data,

Geologic data.

5. Selecting the method ( complex of methods) of geochemical surveys on site.

6. Establishment of Onsite Laboratory for sample collection

7. Endorsement of logistics issues.

8. Endorsement of contractual terms of Project.

Sampling methods and field surveys

Sampling pattern & Grids:

The field surveys will be undertaken based on geomorphology and geological aspects of the study area.

It is proposed to study the satellite imagery of the study area to facilitate designing of the sample sites and pattern.

The components of any other available data (wells, Seismic, Geological mapping) would also be integrated to design the pattern of sampling


Sampling Methods /Technology

1 – tube produced from inert aggregate, 2 – funnel,3 – filter, 4 – capsules filled with sorbent, 5 – sealing rings, 6, 10 – packer rubbers, 7 – screw with a connection piece, 8 – vacuum pipe, 9 – holder, 11 – blind joint.

Devices to Conduct Surveys Using the Technology of Passive/Active Adsorption of Gaseous Soils


Gas obtained by means of thermovacuum degassing is sucked through the sorbent tube

Advantage: Concentration, thus, sensitivity grows depending on the volume of sucked out gas

Free pore gas migrating from the depth is collected

Advantage: Funnel size covers considerably greater surface leading to higher concentration, thus, sensitivity

PASSIVE ACTIVE

2. Active free pore gas sampling

on sorbent (artificial) - collection

of free pore gas by means of its

pumping on sorbent

.

OUR SURVEY Sampling Methods

Auger drilling to collect samples of surface sediments (soils) or pore

gases in summer


1. Passive free pore gas sampling –

collection of migrating free pore gas on sorbent.

Sorbents can be:

on artificial sorbent;

on natural sorbent

The device used by YUGRANEFTEGAS Research Center consists of a tube produced from inert aggregate (stainless steel, plastic), where two capsules filled with a sorbent are placed parallel to each other, with a seal to avoid the possibility of the gas flow from the earth interior going past the capsules with sorbent. A filter is placed under the capsules with sorbent to absorb water vapor.

A sealed funnel is attached to the lower end of the tube to direct the gas flow from the earth interior passing through the surface sealed with such funnel to the tube.

The device may be installed at the needed point.

Atmogeochemical survey using passive adsorption method with the collection of the samples for sorbent

The sensitivity of the method used by YUGRANEFTEGAS Research Center exceeds the sensitivity of foreign counterparts more than 1,000-fold not only because of drain area but also because of enrichment of gas volumes

The method used by YUGRANEFTEGAS Research Center is also used to control the sealing of underground gas storage facilities (UGSF).


COMPARISON OF SAMPLING METHODS FABRIC UNIT AND YUGRANEFTEGAS UNIT AT PASSIVE ADSORPTION

HC flow HC flowd=5 mm d=60mms=19,6mm2 s=2826 mm2

Horizontal change of pressure and, subsequently, horizontal filtration is inexistent as a phenomenon.

HD filtration only takes place vertically

The surface of fabric unit is approximately 19,6mm2 whereas Yugraneftegas tool surface ranges between 1589-2826 mm2 .


Laboratory research investigations include the following analytical studies:

- chromatographic analysis of free gases(С1-С6, Н2, Не, СО2, N2+О2);

- chromatographic analysis of light hydrocarbons (liquid С7 – С9, including aromatic);

- chromatographic analysis of heavy hydrocarbons (С10 – С20);

- litho-geochemical study of elements;

- isotopic analysis of Random Samples .http://www.geochemistry.ru

Types of gas geochemical surveys conducted by YUGRANEFTEGAS Research Center

- Geochemical survey with the collection of samples of rocks (soils), snow or water with their further degassing and chromatographic study of the liberated gas content.

- Geochemical survey with the collection of samples of free pore gas from surface sediments, snow cover or air samples from near-surface layers of the atmosphere.

- Geochemical survey using active adsorption method with the collection of the same gas samples on sorbent.

- Geochemical survey using passive adsorption method for hydrocarbon gases coming from the earth interior on sorbent.Mapping of Geochem anomalies in the designated area superimposed on Geologic maps/Seismic map(if available)


Pore gas samples obtained by degassing of the samples of soils, drilling liquid, snow or water or directly obtained from the pore space of soils or snow are analyzed using gas chromatographs with flame ionization detectors (FID)

Such detectors have the sensitivity of up to 10-6, i.e. one hydrocarbon molecule per one million of air molecules

Saturated and unsaturated hydrocarbons from methane to hexane are determined, in particular in background and anomalous fields

Heavier hydrocarbons in free gases of pore spaces and near-surface layers of the atmosphere are usually present in the quantities which may not be directly determined using gas chromatography methods

Classic Geochemical Survey


Comparison of Geochemical Survey Methods

No

Geochemical Survey

Method

Yugraneftegas Research Center Geochemical Survey Methods

Soil, Water, Snow, Free Pore Gas and Air

Sampling Passive Sorption

MethodActive Sorption

Method

1 Sampling Method modulesSamples: soil, water,

snow, gas Yugraneftegas

Research Center modules

Free pore gas samples for sorbent

2 Sampling Time 17-20 and more days 10-20 min 20 days 25 min

3 Hydrocarbons Identified С2 – С20 С1 – С6 С2 – С46 С2 – С46

4

Sensitivity of Hydrocarbon Identification Method

1*10-9

1*10-12

1*10-12

1*10-12

5 Laboratory Research Methods TD-GC–MS TD, gas chromatography TD-GC–MSGas

chromatography, GC–MS

6 Detection of Background and Anomalous Fields available available available available

7Integrated Interpretation of

Geochemical, Geophysical, Geologic, and Drilling Data

available available available available

10 Adverse Environmental Impact none none none none

• Sensitivity of our technology is 1000 times higher than the ones applied by other companies due to the method of sample enrichment;

• Sample design is based on geologic and Satellite Remote sensing data- in particular Lineament patterns , Geomorphology and subsurface geology

• Mapping of geochem anamoly areas help in prioritisation of integrated seismic data acquisition in focus areas.This would reduce cost of exploration by a factor of 20-30%

• Availability of own laboratory in the territory of India/ at the site

OUR Advantages

YUGRANEFTEGAS Testing Laboratory received technical competency and independence accreditation from the Federal

Accreditation Service:


HC Chromatogram (C2-C24) for an area in Komi

HC Chromatogram (C2-C24) for an area in Komi


Время, мин

Компонент Группа Площадь Высота Концентрация Ед. концентрации

Детектор

6.979 n-бутан 0.981 0.151 1.0941777201519 -н ПИД-2

7.758 Oc5-3 25 С5" 0.069 0.162 0.0745451565114 ПИД-2

8.927 n-пентан 0.199 0.103 0.2206421307045 +н ПИД-2

20.165 t-гептен-2 23 С7' 0.584 0.131 0.6294249094868 ПИД-2

20.761 о/г 1 о/г 2.649 0.174 3.9732661111993 ПИД-2

28.458 толуол Б+Т 6.875 0.547 6.9509576850988 + ПИД-2

33.568 2,4-диметилгептан 08 иС9 200.131 30.897 219.1437636606090 ПИД-2

34.028 1,1,4-триметилциклогексан

09 цС9 5.704 0.751 6.1431616419081 ПИД-2

35.704 этилбензол 07 аС8 1.914 0.250 1.9507562134384 +н ПИД-2

36.269 m-ксилол 07 аС8 10.023 1.127 10.2139344839888 ПИД-2

36.915 4-метилоктан 08 иС9 13.529 2.162 14.8146576272366 ПИД-2

37.595 o-ксилол 07 аС8 17.856 2.122 18.1955116102389 +н ПИД-2

39.940 Ic10-3 12 иС10 0.757 0.109 0.8268676899014 ПИД-2

40.202 Ic10-4 12 иС10 22.789 3.509 24.8856557946333 ПИД-2

40.773 Ic10-5 12 иС10 135.216 20.955 147.6556848401660 ПИД-2

40.983 5-метилнoнан 12 иС10 3.183 0.520 3.4759857406268 ПИД-2

41.244 3-этилоктан 12 иС10 1.496 0.240 1.6332785041235 ПИД-2

41.530 Ic10-8 12 иС10 217.055 31.931 237.0240754939380 ПИД-2

42.488 1,3,5-триметилбeнзол 10 аC9 1.988 0.220 2.0381497526515 ПИД-2

42.911 Ac10-3 13 аC10 10.008 1.573 10.3083916306189 ПИД-2

43.131 Nc10-12 11 цС10 7.235 1.137 7.7924931385105 ПИД-2

43.428 Ic11-6 14 иС11 2.912 0.503 3.1796027719995 ПИД-2

43.513 3-этилнoнан 14 иС11 3.071 0.490 3.3538161577321 ПИД-2

43.757 Nc10 11 цС10 3.290 0.492 3.5434932752615 ПИД-2

45.185 Ac9-1 индан инд 27.596 4.083 35.8471000988751 ПИД-2

45.817 Ic11-16 14 иС11 2.821 0.377 3.0804934216005 ПИД-2

45.955 Ac10-11 13 аC10 2.681 0.405 2.7616867715843 ПИД-2

47.009 Ac11-4 18 аC11 0.930 0.103 0.9614681397463 ПИД-2

47.593 Ic12-2 16 иС12 3.156 0.620 3.4431273415683 ПИД-2

47.654 Ac11-6 18 аC11 5.298 0.637 5.4785456587942 ПИД-2

49.694 Ac11-20 18 аC11 1.513 0.218 1.5646423882196 ПИД-2

49.816 Ac12-3 19 аC12 0.208 0.111 0.2156930562397 ПИД-2

50.311 нафталин нафт 2.002 0.258 2.4668864711425 ПИД-2

50.807 Ac11-17 18 аC11 6.956 0.644 7.1924623584231 ПИД-2

51.125 Ac11-21 1ЭИ инд 5.777 0.473 7.2209074756549 ПИД-2

51.951 n-додекан С11+выше 0.608 0.106 0.6628559358478 + ПИД-2

52.511 Ac11-25 18 аC11 2.288 0.245 2.3660307379574 ПИД-2

53.286 Ac11-28 2,4 ДМИ инд 0.679 0.112 0.8488313779065 ПИД-2

53.483 Ac11-29 1,3 ДМИ инд 1.831 0.219 2.2893457219384 ПИД-2

53.821 Ac12-11 19 аC12 6.394 0.524 6.6370810726339 ПИД-2

54.373 Ac11-30 5,6ДМИ инд 2.891 0.344 3.6132152562176 ПИД-2

55.129 Ac12-14 19 аC12 3.587 0.291 3.7233527194209 ПИД-2

55.667 Ac12-15 19 аC12 1.541 0.288 1.6000402468261 ПИД-2

55.859 Ac11-33 19 аC12 5.267 0.468 5.4671646218637 ПИД-2

57.274 Ac12-20 19 аC12 12.049 0.925 12.5068236627906 ПИД-2

57.928 Ac11-35 18 аC11 1.662 0.296 1.7185591649981 ПИД-2

Legend of the HC chromatogram (C2-C24) for an are in Komi

Case Studies

Distribution of licensed area on the basis of geo-chem surveys conducted by “Yugraneftegaz”

Contours of licensed blocks and geochemical anomalies

The map of the volumes of geochemical surveys on the

sections of seismic lines (on the topographic base)

Sredne - Hylumskya lisenced area

• In the process of drilling of the exploration wells we mainly used the results of seismic exploration works.

• Worked out geochemical profile and its number


Map of complex geochemical anomalies superimposed on the

structural seismic map Ач2

Sredne - Hylumskya licensed area. Geo-chemical survey


Geochemical anomalies

Map of complex geochemical anomalies superimposed on the

structural seismic map Ач2

Sredne - Hylumskya licensed area.


Graphic symbols:

" Geochemical points

Complex geochemical anomalies

Seismic profiles

Seismic profile

Geo-chemical survey + seismic survey

Map of complex geochemical anomalies superimposed on the structural seismic map

Ач2

Sredne - Hylumskya licensed area


Fluid saturated:

Oil

!< Oil and Water

Water

Dry

Graphic symbols:

" Geochemical points

Complex geochemical anomalies

Seismic profiles

Wells drilled within geochemical anomalies were productive

Geo-chemical survey + seismic survey + drilled wells

Comparison of the map of complex geochemical anomalies

with the map of prospective targets layer Ач2

The wells, drilled within geochemical anomalies brought the

oil

Sredne - Hylumskya lisenced area


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GEOCHEMICAL PROSPECTING IN OIL & GAS EXPLORATION INNOVATIVE EXPLORATION OF OIL AND GAS FOR MORE THAN...

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