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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
Prediction of the most promising areas within oil and gas basins for licensing and exploration activities Prospects identification and their priority ranking within license area Location of reservoir distribution within proved deposits, saturation evaluation and optimization of appraisal and production drilling Prediction of porosity, gas saturation, bulk density of hydrocarbon resources per reservoir volume, initial flow rates in new wells Mapping of artificial gas pools 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	30+ years of research 20+ years of production experience 89+ successful E&P projects 80+ newly drilled wells checked 3D models 164+ well tests 82% of well tests confirmed 3D models 18% risk of drilling wet well and dry well 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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