MineaOil Limited offers exceptional expertise, in gas reservoirs consulting and trainings, with innovative solutions for the evaluation, design and planning the development of dry gas, wet gas and retrograde condensate gases.
Our associated consultants are expert evaluating, designing, planning and implementing gas fields, them have worked in North Sea, Latin America, Africa, and Australia.
We have experienced the evolution of new technologies and strategies to develop gas field since the decade of 1980 to 2020 which dramatically optimized the productivity.
Gas Condensate
Gas condensates are low-density mixture of hydrocarbons liquids present as gaseous components in the raw natural gas stream produced from gas fields, natural gas condensate condense to a liquid state if the temperature is reduced below the hydrocarbon dew point temperature at a set pressure.
Natural gas condensate is also referred as condensates or natural gasoline because it contains hydrocarbons within the gasoline boiling range.
Gas Wells and Completions
Currently, the gas well vertical completions (refers to image below) are designed to achieve high rates up to or above 250 mmscf/day for a single open or cased hole vertical well.
Horizontal sidetracked holes are useful to target the sands with better reservoir properties identified from petrophysics calibrated with seismic attributes.
Horizontal multilaterals completions (see image above) are used in unconventional tight gas sands.
Gas Fields Integrated Evaluations
MineaOil execute multidisciplinary evaluations of gas fields, integrating seismic, depositional environment, petrophysics interpretations, rock typing, fluids behavior, wells position, pressures and production tests.
The data is integrated and calibrated in numerical simulation models, then used to evaluate different development scenarios and to define the optimum developments.
Handling Condensate Banking in a Gas Well
The retrograde gas condensates change phases as the pressures reduces from the initial pressure to the bottom hole flowing pressure, passing from only gas phase flow (point A in the illustration), condensates build up (B), gas and liquid flow (C) and at the well perforations (D); in this trajectory a fraction of liquids is dropped out within the reservoirs, that fraction is the liquids drop out that does not flow because the gas moves faster because of its lower viscosity.
MineaOil Limited design programs to quantify the retrograde gas condensates banked in the wells, and well treatments to recover the trapped liquid volumes.
Gas Treatment: Modeling and Defining Uncertainties
The gas condensates stream is treated at the processing plant, where is dehydrated, and acid gases are removed. The ethane, propane, butanes, and pentanes and hexanes are recovered as by-products. The water removed from both the high- and low-pressure separators may need to be processed to remove hydrogen sulphide (H2S) before disposal or reuse.
The complete process is modelled (see image above) with appropriate combination of petroleum software, that allow the generation of Uncertainty charts production profiles to be used in economics evaluations.
Front End Engineering
We commit to work with your teams and to dedicate our best efforts to the successful execution of all the stages off your project, from planning, detailed engineering, economics evaluations, project management, construction, inspection, project control, development and operations.
We have the experienced professionals, project managers, project engineers, field coordinators, inspectors and project support resources to facilitate and manage all development phases of offshore projects.
Gas Projects Where MineaOil Associates Have Contributed
Exploration, appraisal and development Quiriquire Deep Gas field Eastern Venezuela 1975-1978.
Exploration campaign Offshore North of Paria Eastern Venezuela 1978-1980.
Devenick retrograde gas condensate development 120 MMscfd North Sea UK. 2008.
Andrew gas field Gas Cap Depletion plan 2008.
Svend field North Sea 2009-2010.
Ogo Offshore Nigeria FDP, oil and gas development planning. November 2016.
Tortue gas development plan evaluation Tanzania, June 2016.
Fortuna gas development plan evaluation Equatorial Guinea, April 2016.
Miscible Gas Injection El Furrial. 450 MMscf/day dry gas at 6500 psi and 290 °F.
Gas Injection Feasibility Study for El Furrial field, identifying miscible injection dry gas, compositional simulations & laboratory tests to verify multiple contact miscibility: slim tube and swelling tests, SCAL tests done at Core Lab, Westport Lab & Intevep; facilities, conceptual designed, notional cost and economics.
Evaluated gas injection effects in oil with high asphaltenes content, defined mitigation actions to prevent deposition 1991-92.
For further information regarding any of these projects, please contacts us.
MineaOil Gas Developments Skills
Best practices in co-development of gas cap and oil rim.
Classical reservoir engineering methods (material balance) to identify situations where simulation may or may not be required.
Fluid characterization issues and how they relate to gas cap co development and provide various scenarios development planning scenarios.
Reservoir simulation and ability, capable of performing mechanistic & sector Compositional Simulation modeling, using advanced modeling techniques.
Field Development Plan study with an understanding of uncertainty management.
Skills in high level reservoir monitoring and reservoir management in gas cap development.
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