Consecutive research programmes, based on the views of project sponsors have been prepared and successfully conducted since 1986. The programme addresses issues of relevance to development of efficient and reliable methodology for calculation, design and productivity enhancement of gas-condensate wells. Below some of our key findings in previous phases and main items of current interest have been highlighted.

Main findings in previous phases.

• Gas and condensate relative permeabilities measurements at near well bore conditions have been conducted for moderate/high permeability rocks, perforated cores, propped fractures and a number of tight cores.
• The formulation of a new generalised kr-correlation, which reliably predicts gas-condensate relative permeability as a function of velocity and interfacial tension, has been submitted to Schlumberger, Landmark and Computer Modelling Group for inclusion in ECLIPSE, VIP and CMG, respectively. This formulation is set to replace our previous version in 2009 ECLIPSE release.
• In house mathematical models describing gas-condensate flow in complex rock geometry (perforation, hydraulically fractured and highly deviated wells) have been developed to improve design methodology and propose efficient methods of describing such wells in commercial numerical simulators.
• Based on the results of these in-house simulators, new formulations for perforation/fracturing skins and a new methodology for optimum fracture design have been proposed.
• Effect of pertinent parameters on the cleanup efficiency of a hydraulically fractured well has been studied to some extent.
• We have compiled the NeW-COIN software, which is a desktop mini-compositional simulator suitable for both researcher and field reservoir engineers and includes all our formulations and proposed methodologies to reliably estimate gas-condensate relative permeability and productivity of open hole, perforated or hydraulically fractured gas-condensate wells.
• A series of relative permeability measurements have been carried out to evaluate performance of chemicals for wettability alteration to alleviate condensate banking and improve gas and condensate kr values.

Main items of the current interest:

• Perform laboratory core flow measurements at near wellbore conditions using different fluids and (tight and carbonate) rocks,
• evaluate/extend the use of our generalized correlation to tight and carbonated rocks,
• continue to support the implementation of our findings in commercial reservoir simulators,
• further evaluation of the performance of chemicals for wettability alteration,
• include the impact of pertinent parameters affecting the fracture cleanup efficiency on the optimized fracture design methodology proposed in the previous phase of the project,
• further develop the NeW-COIN software to include our recent findings,
• conduct mathematical modeling of flow in deviated and highly deviated wells including perforated and/or fractured completion in such wells,
• and numerical simulation of laboratory, well and field data