DEPROIL - Your Partner in Complex Geological Settings

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82% OUT OF 164 PERFORMED SURVEYS, CONDUCTED IN 80 NEWLY DRILLED WELLS HAVE CONFIRMED PRESENCE OF GAS IN PREVIOUSLY MAPPED GAS RESERVOIRS BASED ON THE 3D GRAVITY SURVEY RESULTS 

 

MEANINGFUL & ROBUST 3D MODEL OF OIL & GAS RESERVOIRS -
THE RESULT OF UNIQUE JOINT 3D INVERSION OF GRAVITY,
SEISMIC AND WELL LOG DATA

Defining the optimal contour for the licensing based on the results of mapping oil and gas prospects within hydrocarbon-bearing basins

Identification of oil-and-gas prospects with different morphological type and defining the priority of its exploration within the license

Mapping the distribution of oil- and gas-bearing reservoirs within producing and prospective horizons; substantiation an optimal placing for new prospecting and production wells

Creating 3D models of porosity, gas saturation, the spatial density of recoverable hydrocarbon resources and initial flow rates in wells

Mapping of production-induced changes within oil and gas reservoirs: pressure drop, gas saturation change, gas-water contact rise, localization of unswept zone

Creating 4D dynamic model of underground gas storage in progress based on results of 4D gravimetric data acquisition and 4D gravity inversion

Mapping of artificial gas pools

30+ years of
research

20+ years of
production
experience

89+ successful
E&P projects

80+ newly drilled wells
checked 3D models and
prognosis of HC saturation

164+ well tests

82% of well tests
confirmed a horizon-
oriented prognosis of
gas- and oil-
producing potential  

18% - actual risk of
drilling wet / dry well,

prowen by drilling results

4 oil and gas
field discoveries

 

 
DENSITY
AS FUNDAMENTAL
ROCK PROPERTY

 
CRITICAL FACTORS FOR EXPLORATION & PRODUCTION SUCCESS, WHEN APPLYING GRAVITY DATA

3D joint inversion of gravity, seismic, well log, petrophysical and geological information is the only way to obtain meaningful information from gravimetric data.

Implication of additional geological and geophysical data into gravity inversion allows to impose geologically reasonable constraints on the variations of parameters within the model (rock density, bedding depth) and to parametrize the inversion algorithm for obtaining a unique geologically meaningful 3D model out of the multiple possible solutions which correspond to the observed gravity.

Gravity inversion comprises 3D density model of the entire geological section - from the land surface to the crystalline basement or mantle (in case of regional exploration).

Using complete Buguer anomaly for inversion does not require to separate it into single components or extract gravity anomalies which correspond to structures and local objects. 3D gravity inversion provides compensation of obtained gravity by changing the entire 3D density model.

Using actual rock density allows to calculate 3D models of density with 60-85% correlation between actual and modelled data, as well as 3D models of petrophysical parameters such as porosity, hydrocarbon (HC) saturation, hydrocarbons in-place per rock volume and predicted total amount of hydrocarbon resources and reserves.

 
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