Examples of Application
OIL AND GAS
the PMRSE technology in oil and gas projects has
demonstrated that the use of the technology can exclude or reduce the number of
empty exploration and production wells drilled outside the boundaries of
deposit; additional PMRSE survey conducted at the explored deposits can
show new locations for drilling production wells and discover new
productive horizons missed or not tested during the deposit exploration, etc.
Below is a summary of some oil and gas projects implemented using the PMRSE
Survey of natural gas resources in
coal-bearing deposits of a dome structure, Donetsk coal basin, Ukraine.
The PMRSE survey
was conducted at the worked-out coal minefields with the total area of 23 sq.km.
and had a goal to determine the natural gas resources below the worked out
horizons. Earlier in the 1960-70s at the area there was a recovery of the
natural gas from the depths not exceeding 1000 m. The PMRSE survey was performed
from a car following a grid of routes with a more detailed survey performed at the
areas of most interest. Driving along the routes the maximum methane content in
geological section was measured every 10-20 m without specifying
the bedding depth of gas saturated rocks. To determine the bedding depth of gas
saturated rocks in a geological section within the anomalies found three
soundings were performed to the depth of 2600 m. The results of the
areal survey (PMRSE mapping) showed three dome structures with the anomalous
gas saturation of rocks. The map of the anomalous methane content is shown on
the left. In the depth interval from 1000 to 2600 m the results of soundings
showed several gas saturated horizons with the total effective thickness from
160 to 350 m in different locations. The gas
saturated were found to be sandstone, calcareous sandstone and Carbonic
limestone. In the detected hydrocarbon deposits an estimated correlation between
the natural gas and liquid hydrocarbons was also calculated based on the sounding
– Exploration of an oil field in the Crimea, Ukraine.
The object of investigations was
one of small-scale oil fields at Kerch Peninsula (eastern part of
the Crimea) coinciding with anticlinal structures in the formations of the
Oligocene period. The productive horizons are usually observed in packages of
siltstones and sandstones inside the clay mass and are often controlled by
tectonic fractures. The deposit was discovered using
and explored by drilling. From many wells drilled at the site only well No.18
produced oil. At present it is still in use. The rest wells produced water.
The goal of the PMRSE
investigations was to determine the boundary of oil-saturated rocks in plan and
suggest a location for drilling a new production well.
Thus, in the vicinity of
areal survey was conducted afoot
using a grid of profiles located every 100-200 m and two soundings were
performed within the anomaly mapped to the depth of 900 m looking at the lithologic composition of oil-saturated and watered rocks in the cross-section.
The soundings were performed with the step of 0.5 m. Sounding No.1 at the well
No.18 was conducted as a test and sounding No.2 was targeted for drilling
another production well. The PMRSE survey determined a boundary of oil saturated
rocks which formed an anticline structure, recommended a location for drilling a
new production well and indicated depth intervals with expected oil inflow. At present the
well recommended from the PMRSE survey is drilled and produces oil.
Exploration of oil and gas fields at Poltava and Sumy regions, Ukraine.
investigations performed at the explored oil and gas fields confirmed the
available information about the boundaries, composition, spatial variability of
hydrocarbon deposits and location of water-oil contacts as well as provided some
new conclusions about the structure of the deposits. The PMRSE findings were of
special value when the decisions had to be taken about putting into operation
the existing wells and selecting locations for drilling new ones. The PMRSE
soundings confirmed the location of all productive horizons tested in the
exploration wells. Besides, some soundings detected new hydrocarbon horizons
missed during the deposit exploration.
1999 – Oil survey in
the Western Siberia, Russia, from board of a helicopter.
The PMRSE survey was conducted at three oil fields with the total area of 800
sq.km. in Mesozoic formations of the sedimentary cover of the Western Siberian
Plate for Lukoil Company. The main target was to test the technology for mapping
oil fields from the air. The survey was performed at the control areas of Lukoil
company using a helicopter MI-8 along east-west striking profiles located every
2 km from each other. Based on the survey results a map of hydrocarbon anomalies
was plotted. A fragment of the map is shown on the left. The PMRSE air survey
results were confirmed by inclusion of the oil production wells inside
the boundaries of the PMRSE mapped anomalies. A positive reference was
provided by the Client for application of the technology in oil and gas
exploration from air.
1997 – Oil and gas
survey at the Black Sea shelf, Ukraine, from board of a research vessel.
investigations were performed by the order of the Cabinet of Ministers of
Ukraine in the Northwestern sector of the Black Sea shelf. Hydrocarbon anomalies
detected from board of a research vessel confirmed the oil and gas prospectivity of
a number of structures known from the findings of traditional geophysics. The
survey results were confirmed by the exploration drilling.
1995 – Oil and gas
survey at Odessa region, Ukraine.
Based on the PMRSE
survey conducted at Burnasskaya area it was concluded that the area had no
prospects. A well drilled later according to a positive recommendation by Unical company produced no oil what confirmed the PMRSE field findings obtained