Analysis. Expert Review. Interpretation. Simulation/Modelling. Monitoring.
Making exploration strategy. Preparation of tender documents Seismics (acquisition, processing, interpretation, supervising).
In order to solve the main tasks of exploration and prospecting (namely: studies of formation conditions and structural features of pay intervals; prediction of leads; fields development), the professional planning of the forthcoming seismic operation is of great importance.
Selection of acquisition systems should be selected with particular care, and informed choice of seismic sources should be made.
When planning geological and geophysical works and designing surveys, the additional advanced features are included with provision for the future (in 4-5 years) data re-processing and re-interpretation.
In the course of building seismic information processing and interpretation flows, the emphasis is laid on application of modern methods and technologies, which will be most efficient in geoseismic settings of study area.
Interpretative support of seismic data processing.
The main task of processing is to obtain geologically adequate, laterally and vertically resolved, high-quality seismic data for building structural and tectonic framework and prediction of reservoir properties in the cross-borehole space.
The task is solved by means of supervising of processing in relation to the subsequent interpretation.
Every processing stage is under control of seismic modelling over the wells, calculation and analysis of slices corresponding to sedimentation units in the target interval for a number of attributes, including coherence.
Software used: SeisEarthXV, Vanguard, Stratimagic (Paradigm)..
In-depth interpretation of seismic and well log data.
The optimal solution of problems related to traps geometrisation, prediction of reservoir properties in pay zone, reconstruction of depositional environment is achieved through focusing on and analysis of all available geological and geophysical information.
Interpretation in 3D volume of 2D and 3D seismic data allows building consistent structural and tectonic models. For this purpose we widely use modern procedures of automated and semi-automated tracing of reflection horizons and tracking of fault planes, their reconciliation, and various mathematical algorithms, including geostatistics used to create final maps.
The following techniques are used in the stage of amplitude interpretation: 3D attribute analysis; seismic facies analysis; seismic inversion, including acoustic, elastic, simultaneous (stratigraphic) inversion using a set of common offset cubes, and neural inversion.
Well log data interpretation is carried out in both pointwise and interval modes; these works are accompanied by reservoir identification, evaluation of saturation behaviour, determination of porosity, substantiation of fluid contacts.
Clustering of well logs and petrophysical calibration of seismic inversion are conducted.
The following software is used for interpretation: SeisEarthXV, Vanguard, Stratimagic 2D/3D, VoxelGeo, Geolog (Paradigm); GeoTeric (ffa); KINGDOM (IHS); TechLog (Schlumberger); GeoOffice Solver (Tvergeofizika LLC).
Building geological and technological models. Reserves assessment. Assessment of risks and uncertainties.
Various approaches are widely used to build field geological models, including stochastic methods. But depositional model of reservoir is always the base; it is supported by integrated facies analysis of regional data, seismic information, well logs, and core data.
Deterministic and probabilistic approaches are used for reserves assessment. Selection of the optimal field development option relies on hydrodynamic simulations.
The following software is used: Petrel (Schlumberger); Irap RMS, Tempest More (Roxar); Isoline.
Reservoir engineering in brown fields is carried out on the basis of in-depth field geological analysis of all available data.
Planning of field development on the basis of sector modelling taking into account features of development and misfits of historic databases allows to minimize risks and plan activities for optimization of production potential.