Gas Condensates
Wells in gas condensate reservoirs usually exhibit complex behaviours due to condensate deposit as the bottomhole pressure drops below the dew point. The formation of this liquid saturation can lead to a severe loss of well productivity and therefore lower gas recovery. A similar behaviour is observed in volatile oil reservoirs below the bubble point. Understanding these behaviours and extracting values of controlling parameters is necessary to evaluate well potential and design effective programmes to improve productivity.
Our work to-date, in Phases I and II of the JIP, has focused on vertical and horizontal wells in sandstone reservoirs and has led to a better understanding of near-wellbore effects in gas condensate and volatile oil reservoirs from well testing.
Although a large body of knowledge has been acquired through our research in the last seven years, significant challenges remain in the analysis of well tests in gas condensate reservoirs below the dew point pressure, and of well tests in volatile oil reservoirs below the bubble point pressure. These are addressed in the current Phase III of the JIP, which includes:
- Completing the work initiated during Phase 2
- Applying deconvolution to the analysis of gas condensate and volatile oil well test data
- Developing methods for predicting and improving well productivity and evaluating the effectiveness of different remediation solutions
| Attachment | Size |
|---|---|
| Proposal Gas Condensates 2005-2008 Ch.pdf | 553.91 KB |
Publications
| SPE Number | Year | |
|---|---|---|
| SPE121326 | Predicting when condensate accumulation near the wellbore in a gas condensate reservoir can be identified from a build up | 2009 |
| SPE121848 | Well Test Dynamics in Rich Gas Condensate Reservoirs Under Gas Injection | 2009 |
| SPE0 | An experimental study of wellbore phase redistribution effects in gas condensate reservoirs (4th International Conference on Multiphase Production Technology, Cannes, France 17-19 June 2009) | 2009 |
| SPE118377 | Application of Well Testing for Well Deliverability Forecasting in Volatile Oil Reservoirs | 2008 |
| SPE116239 | Well Test Analysis in Volatile Oil Reservoirs | 2008 |
| SPE100993 | Well Test Analysis in Lean Gas Condensate Reservoirs: Theory and Practice | 2006 |
| SPE100250 | Integration of Well Test Deconvolution Analysis and Detailed Reservoir Modelling in 3D Seismic Data Interpretation: A Case Study | 2006 |
| SPE93136 | Productivity Assessment of Fractured and Non-Fractured Wells in a Lean/Intermediate Low Permeability Gas Condensate Reservoir | 2005 |
| SPE94018 | Estimating Gas Condensate Well Productivity Controlling Parameters from Transient Pressure Data | 2005 |
| SPE96587 | Experimental Investigation of Wellbore Phase Redistribution Effects on Pressure-Transient Data | 2005 |
| SPE89904 | New Estimate for the Radius of a Condensate Bank from Well Test Data Using Dry Gas Pseudo-Pressure | 2004 |
| SPE89905 | Well Test Analysis of Horizontal Wells in Gas-Condensate Reservoirs | 2004 |
| SPE89911 | Estimates for the Growth of a Condensate Bank from a Simple Compositional Model | 2004 |
| SPE94178 | Comparison of Well Productivity between Vertical, Horizontal and Hydraulically Fractured Wells | 2004 |
| SPE62920 | Well Test Analysis in Gas-Condensate Reservoirs | 2000 |
PhD Theses
| Title | Author | Year |
|---|---|---|
| Well Test Dynamics of Rich Gas Condensate Reservoirs | Olalekan A. Aluko | 2009 |
| Well Test Analysis in Volatile Oil Reservoirs | Moshood Olajide Sanni | 2008 |
| Modelling Of Flows In Vertical Pipes And Its Application To Multiphase Flow Metering At High Gas Content And To The Prediction Of Well Performance | Gioia Falcone | 2006 |
| Evaluation of Horizontal Gas-Condensate Wells Using Pressure Transient Analysis and Compositional Simulation | Abdolnabi Hashemi | 2006 |
| Characterisation and Determination of Gas Condensate Dynamics from Pressure Transient Data and Fluid PVT Properties | Manijeh Bozorgzadeh | 2006 |
| New Developments In Well Test Analysis | Saifon Daungkaew | 2001 |
MSc papers
| Title | Author | Year |
|---|---|---|
| Use of Black Oil Models for Complex Reservoir Fluids | Adnan Merchant | 2008 |
| Simulation Of Possible Gas Condensate Banking | Ulan Burkitov | 2008 |
| Estimating Storativity Ratio In Wells Producing Volatile Oil | Sola Makinde | 2008 |
| Well Test Analysis In Naturally Fractured Gas Condensate Reservoirs Below Dew Point Pressure | Ahmed Albaqawi | 2008 |
| Experimental Study of Wellbore Dynamics in Gas Condensates | Sohaib M. Mirza | 2008 |
| Evaluation of Confidence Intervals in Well test Interpretation Results | Ali Cherif Azi | 2007 |
| Predicting the Onset of the Effect of Condensate Accumulation in the Build-Up Pressure Derivative Plot | George Krukrubo | 2007 |
| Well Tests In Naturally Fractured Gas-Condensate Reservoirs | Hammed A. Shittu | 2007 |
| Effects of Material Balance on Well Test Analysis | Amit Madahar | 2007 |
| Prediction of the production performance of a Gas Condensate Well in the North Sea: A Simulation Study | Luther Sullivan | 2007 |
| Modeling of Near Wellbore Flow Effects in Gas Condensate Reservoirs | Nur Suut | 2007 |
| Use of Deconvolution to Improve the Reservoir Behaviour Understanding of Some Gas Condensate Reservoirs in Britannia | Jean-Baptiste Berchoteau | 2006 |
| Well Test & Deconvolution Analyses of Gas Condensate Reservoirs | Olivier Pippi | 2006 |
| Well Test Behaviour in Multi-Layer Gas-Condensate Reservoirs | Perapon Fakcharoenphol | 2006 |
| Pentland Re-development Plan: Predicting the Effects of Condensate Banking in a North Sea HPHT Gas-Condensate Reservoir | Babalola Abiose Daramola | 2005 |
| Volatile Oil Well Testing ‘Best Practice’ and Productivity Enhancement in the MLNW Field, Algeria | Aisha Alfa-Wali | 2005 |
| Composite well test interpretation model for horizontal wells | Nicolas Guézé | 2005 |
| Deconvolution Analysis of a Horizontal Gas Condensate Well | Thabo Clifford Kgogo | 2005 |
| Comparison Of Different Methods For Estimating Gas Condensate Well Deliverability | Bernard P. Sinambela | 2005 |
| Evaluation Of Reservoir Heterogeneities For Modelling Gas Injection In A Retrograde Gas Condensate Reservoir | Sabina Rattan | 2005 |
| Well Test Analysis In A Dual Porosity Gas-Condensate Reservoir | Bandar H. Al-Malki | 2004 |
| Experimental Investigation of Wellbore Phase Redistribution Effect on Pressure Transient Data | Ahmed Moge Ali | 2004 |
| Simulation Of Well Test In Volatile Oil Reservoir | Sanni Moshood Olajide | 2004 |
| Productivity Assessment Of Fractured And Non-Fractured Gas Condensate Wells | Mirza Tarik Ali Baig | 2003 |
| Well Test Analysis In A Volatile Oil Reservoir In Algeria | Arsyad A. Siregar | 2003 |
| Well test analysis in the Hassi R’Mel field, Algeria | Piyatad Tabmanee | 2003 |
| Prediction of Highly Volatile Oil Reservoir Performance Below the Bubble Point Pressure | Abdimurat Ayapbergenov | 2002 |
| A Feasibility Study of Horizontal Wells in the Development of a Carbonate Reservoir Oil Rim - Comparative Sensitivities Using a Sector Model | Clare Siobhan Howat | 2002 |
| Well Test Analysis of a North Sea Gas Condensate Reservoir | Olalekan Aluko | 2002 |
| Well Test Analysis in Gas Condensate Reservoirs | Jiradej Tanapatchaipong | 2001 |
| Well Test Interpretation of Formation Tester Data of Gas Condensate Reservoir | Binayak Agarwal | 2001 |
| Composite Behaviour In Multi-Layered Reservoirs | George Mykoniatis | 2001 |
| Wellbore Dynamics in Gas Condensate Wells | Akemu, Akpeki Onajomo | 2001 |
| The Applicability Of Timely Gas Injection In Gas Condensate Fields To Improve Well Productivity | Daniel Leseja Marokane | 2001 |
| Evaluation of the potential of well 30/7A-P1 in the Judy field | Manijeh Bozorgzadeh | 2001 |
| High Pressure High Temperature Well Test Interpretation Jade Field, UKCNS | Abdolnabi Hashemi | 2001 |