Περιγραφή της προμήθειας
A. The Technical Studies shall include the following:
1) Geological data review and analysis
Review and analysis of available geological data including well logs, cuttings and core data (analyses and core photos). The main activities included (but not limited to) are the following:
(i) regional geological study;
(ii) structural geology to investigate the structure of the field;
(iii) stratigraphy and sedimentology based on rock and electric log data Identify geological units and stratigraphic correlation charts;
(iv) reservoir zones: critical input to static modelling and further reservoir performance analysis.
2) Petrophysics
South Kavala has 8 wells (five vertical and three deviated) two of which provide reservoir characterisation just outside the original gas water contact at about 1723 mss. The main petrophysical study elements required are, inter alia, the following:
(i) compilation and preparation of wireline log data;
(ii) review of core data to ensure consistency;
(iii) interpretation;
(iv) uncertainty modelling.
3) Seismic
Both 2D and 3D seismic data are expected to be available as regards the almost depleted natural gas field of South Kavala. Interpretation of available 2D and 3D SEGY seismic to produce a well-tied structural surface at top porosity and any mappable intra-reservoir layers in Two-Way Time and Depth using a data-based velocity model for depth conversion.
4) Reservoir engineering data analysis
Reservoir engineering data analysis to be performed to understand dynamic aspects of the reservoir and prepare dynamic modelling inputs.
5) Static modelling
The preparation for static modelling shall include, inter alia, review of the available data and data conditioning, the development of an environment of deposition model to predict facies trends, fault and depth structural modelling and property modelling.
6) Dynamic modelling
The objective of this task is to estimate the dynamic capacity of the reservoir for underground gas storage (UGS) and investigate production and injection cycles. The main steps to be taken include (but are not limited to):
(i) preparation;
(ii) history matching;
(iii) scenario simulation.
7) Geomechanics
Assessment of containment (cap rock integrity) and storage adequacy issues, fracture pressure gradient and borehole stability. Based on these outcomes a fit for purpose 1D or 3D geomechanical model will address the issues above in addition to any potential fault instability analysis in more details using industry standard software. The regional setting within a seismically active zone will be taken into consideration.
B. The main Deliverables include:
1) Geological analysis report;
2) Petrophysical analysis report and LAS files;
3) Seismic processing and interpretation report (if required) as well as grids and fault stick in an industry standard software format (preferably Petrel or Kingdom or equivalent);
4) Reservoir engineering data analysis report;
5) Static modelling report and model in an industry standard software format (preferably Petrel project or equivalent);
6) Dynamic modelling report, Simulation files (Eclipse or equivalent) and simulation results in an industry standard software format (preferably Petrel or equivalent);
7) Geomechanical analysis report and model files in an industry standard software.