1. Electrical prospecting Land works
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2. Talara Basin province (http://pubs.usgs.gov/bul/2206/A/b2206-a.pdf)
A north-south cross section of the offshore Talara and southernmost Progreso Basin provinces was marked mainly by terrigenous sedimentation.
Thickness of the combined Cretaceous through Tertiary stratigraphic sequences across the coastal basins varies from about 8,500 to 18,000 m (28,000 to 58,000 ft) (Zúñiga-Rivero and Hay-Roe, 1998).
Presence of granitoid intrusions as high-resistance disturbing objects is complicating factor.
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3. Examples of DNME works results in various geological-and-geophysical conditions
Siberian platform 2- CH
174- CH 1- CH 3- 1K
H, km 1 2
Deep wells:
With noncommercial HC influx and productive by GIS
with commercial HC influx
non-productive
Geoelectrical section of polarizability coefficient η distribution for survey line situated within Kovyktinskoye gas-condensate field illustrates the IP response intensity reduction moving away from the field.
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4. Examples of DNME works results in various geological-and-geophysical conditions
Siberian platform
Geological section of terrigenous sedimentation of Kovykta field
sandstone
dolomite
fields
mudstone
granite
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5. Examples of DNME works results in various geological-and-geophysical conditions
Tatarstan
Zones promising for discovery of hydrocarbon deposits has been allocated as a result of DNME works. One of the wells was located over the reef, which were considered no-prospect for oil and gas by seismic data. During drilling, the presence of deposits is confirmed. DNME-seismic complex has been regarded as an effective method searches of oil and gas.
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6. Examples of DNME works results in various geological-and-geophysical conditions
Rostov region
Producing well
Deep fault by magneto telluric sounding data
Geoelectric section of ρ distribution
Geoelectric section of η distribution
Isohypse of the roof of the carbonate rock by seismic data
IP anomaly
The depth of deposits is not critical for DNME. The IP anomaly was identified as a result of DNME works in the geoelectric layer at a depth of 150 m. It is concerned with the reservoir in reef carbonate sediments of Vise stage located at a depth of 3.5 km, later confirmed by the drilling.
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7. Examples of DNME works results in various geological-and-geophysical conditions
Siberian platform
IP anomalies concerned
with deposits of hydrocarbons.
The geoelectric properties of basaltic intrusions are high resistivity, but the increase of IP also can happened (A). This, changes of the time constant occurs along with
the increase of IP. It allows to separate IP anomalies that are not associated with deposits of hydrocarbons.
IP anomalies concerned with dolerite sill (Siberian formation of intrusions).
Characteristic changes of the time constant τ in the zone of IP anomalies concerned
with deposits of hydrocarbons.
Dolerite sill are characterized by high values of resistivity
Geoelectrical sections of parameters distribution:
А. polarizability η; Б. time constant τ; В. resistivity ρ
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8. Customers feedback for the DNME work
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9. Customers feedback for the DNME work
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10. Near-field transient EM sounding
Siberian platform
H, m
The complex of methods, DNME and Near-field transient EM sounding, well has proved.
In this complex technique Near-field transient EM sounding allows to more accurately determine the resistivity of various layers of the section, both terrigenous and carbonate deposits.
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11. Near-field transient EM sounding
Volgo-Uralskaya anteclise
There is artificially filled underground gas reservoir, where gas pipelines and a large number of wells create industrial noise.
Here the gas-water contact was determined using Near-field transient EM sounding after the gas injection.
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12. LLC «Siberian Geophysical Research e-mail: irkutsk@dnme.ru
Contacts
LLC «Siberian Geophysical Research
Production Company»
Russia, Irkutsk City
phone.: +7 (3952) ,
http:
General Director:
Sitnikov Alexander
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