is designed for hydrodynamic logging (GDK) and formation testing (OPK) in open hole. Depth points reference is according to GR data by means of a module comprised in AGIP-K equipment.
Geological problems to be solved
• reservoir identification by influx presence;
• geophysical properties boundary values determination for further reservoir identification by log data;
• effective productive thickness value determination;
• reservoir pressure, permeability estimation, seal-strata insulation properties determination;
• fluid sampling for reservoir saturation nature;
• reservoir pressure profiling and permeability profiling for identification of abnormal high and low pore pressure zones in exploratory holes and for low pore pressure depletion zones, water breakthrough area in production wells;
• well flow-rate and productivity estimation;
• correction of fluid contacts and water to oil areas;
• hydrodynamic conditions determination in different section of a developed pool.
Equipment configuration
The equipment consists of a downhole tool and a surface unit. The downhole tool consists of the functional units, joined by thread elements and plug-in connectors. The surface unit consists of a power and control unit and a recorder (PC – lap-top with relevant software).
Features
Due to module configuration AGIP-K tool provides one fluid sample taking (formation testing OPK) as well as multiple rock properties per trip (hydrodynamic logging GDK).
OPK mode consists in one sealed fluid sample (7-14 liters) taking per trip and further sample retrieving to the surface for laboratory analysis. The OPK mode requires double module configuration (electromechanical module and sample chamber module).
GDK mode consists in multiple reservoir and reservoir sections measurements per trip. The GDK mode requires triple module configuration: electromechanical module, tester module (a sample receptacle) and sample chamber module (a sampler).
The fluid is swabbed into the tester consisting of three chambers of 100, 450 and 200 ml filled up at different pressure conditions. If the flow rate is low, the fluid is swabbed into a small chamber of 10 ml located in a drain channel section. The reduces stationary time and provides low-permeability hydrodynamic properties.
Depth reference is performed according to GR data. The downhole tool includes the GR tool, too.
Tool conveyance and data transmission are performed trough a triple-core logging cable and logging truck hoist.
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Max. hydrostatic pressure, MPa |
60 |
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Max. operating temperature, oC |
120 |
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Diameter of test wells, mm |
140-280 |
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Standard volume for fluid filtration rate determination (GDK mode), sm3 |
10, 100, 450, 200 |
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Reservoir fluid sample volume vs pipe buildup number n, liter |
7 xn |
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Initial pressure for inflow stimulation, MPa |
0.1 |
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Test number (GDK model) per trip · two chambers · small chamber |
no less than 10 up to 60 |
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Samples number (OPK mode) per trip |
1 |
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Measurements range: · pressure, MPa · natural radioactivity, micro-roentgen/hour · temperature, °C |
0.1-60 0-200 5-120 |
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Diameter of apparatus by casing , mm |
100±5 |
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Length, mm · electromechanical drive module · tester module · sample chamber module · electronics module |
1559 790 up to 3383 893 |
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Weight, kg · electromechanical drive module · tester module · sample chamber module · electronics module |
65 30 up to 62 23 |
The results of hydrodynamic logging and sampling of formations by AGIP tool.