Permanent Removal of Condensate Banking in Tight Gas Reservoirs Using Thermochemicals
- Amjed Hassan (King Fahd University of Petroleum & Minerals) | Mohamed Mahmoud (King Fahd University of Petroleum & Minerals) | Abdulaziz Al-Majed (King Fahd University of Petroleum & Minerals) | Ayman Al-Nakhli (Saudi Aramco) | Mohammed BaTaweel (Saudi Aramco) | Salaheldin Elktatany (King Fahd University of Petroleum & Minerals)
- Document ID
- Society of Petroleum Engineers
- SPE International Conference on Oilfield Chemistry, 8-9 April, Galveston, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- 2.4 Hydraulic Fracturing, 5 Reservoir Desciption & Dynamics, 5.8 Unconventional and Complex Reservoirs, 1.6.9 Coring, Fishing, 2.4 Hydraulic Fracturing, 1.6 Drilling Operations, 5.5.2 Core Analysis, 5.8.1 Tight Gas, 3 Production and Well Operations
- thermochemicals, Condensate blockage, tight gas reservoirs, Coreflooding tests, micro fractures
- 16 in the last 30 days
- 125 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 8.50|
|SPE Non-Member Price:||USD 25.00|
Condensate banking is a common problem in tight gas reservoirs because it diminishes the gas relative permeability and reduces the gas production rate significantly. CO2 injection is a common and very effective solution for condensate removal in tight gas reservoirs. The problem with CO2 injection is that it is a temporary solution and has to be repeated frequently in the field in addition to the supply limitations of CO2 in some areas. Also, the infrastructure required at the surface to handle CO2 injection makes it expensive to apply CO2 injection for condensate removal.
In this paper, a new permanent technique is introduced to remove the condensate by using a thermochemical technique. Two chemicals will be used to generate in-situ CO2, nitrogen, steam, heat, and pressure. The reaction of the two chemicals downhole can be triggered either by the reservoir temperature, or a chemical activator. Two chemicals will start reacting and produce all the mentioned reaction products after 24 hrs. of mixing and injection. Also, the reaction can be triggered by a chemical activator and this will shorten the time of reaction. Coreflooding experiments were carried out using actual condensate samples from one of the gas fields. Tight sandstone cores of 0.9 mD permeability were used.
The results of this study showed that, the thermochemical reaction products removed the condensate and reduced its viscosity due to the high temperature and the generated gases. The novelty in this paper is the creation of micro-fractures in the tight rock sample due to the in-situ generation of heat and pressure from the thermochemical reaction. These micro-fractures reduced the capillary forces that hold the condensate and enhanced its relative permeability. The creation of micro-fractures and in turn the reduction of the capillary forces can be considered as permanent condensate removal.
|File Size||1 MB||Number of Pages||11|
Al-Anazi Hamoud A.,Xiao J.J.,Al-Eidan Ahmed A.,Buhidma Ismail M.,Ahmed Mahbub S.,Al-Faifi Mohammad G., and Assiri Wisam J. 2007. Gas Productivity Enhancement by Wettability Alteration of Gas-Condensate Reservoirs. Presented at the European Formation Damage Conference held in Scheveningen, The Netherlands, 30 May-1 June. SPE107493. https://doi.org/10.2118/107493-MS
Al-Anazi, H.A.,Pope, G.A.,Sharma, M.M. 2002. Laboratory measurement of condensate blocking and treatment for the low and high permeability rocks. Presented at the SPE Annual Technical Conference and Exhibition. San Antonio, Texas, 29 September-2 October. SPE77546. https://doi.org/10.2118/77546-MS.
Asgari A.,Dianatirad M.,Ranjbaran M.,Sadeghi A.R.Rahimpour M.R. 2014. Methanol treatment in gas condensate reservoirs: A modeling and experimental study, chemical engineering research and design 92, 876-890, http://dx.doi.Org/10.1016/j.cherd.2013.08.015.
Du, L.,Walker, J.G.,Pope, G.A.,Sharma, M.M.,Wang, P. 2000. Use of solvents to improve the productivity of gas condensate wells. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, 1-4 October. SPE62935. https://doi.org/10.2118/62935-MS.
Franco, C. A.,Solares, J. R.,Asiri, K. S.,Shammari, N.,Alabbad, E. A., & Gomez A. F. A., 2011. Optimization of Conventional Acid Jobs and the Historical Trend Leading to Multi-Stage Acid Fracturing Stimulation to Increase Gas-Condensate Productivity in Carbonate Reservoirs in Saudi Arabia. Presented at the SPE Middle East Oil and Gas Show and Conference, Manama, Bahrain, 25-28 September. SPE141339. http://dx.doi.org/10.2118/141339-MS.
Hasan, A.M.,Mahmoud, M.,Al-Majed, A.A.,Elkatatny, S.,Al-Nakhli, A.R. and Bataweel, M.A., 2018. A Novel Technique to Eliminate Gas Condensation in Gas Condensate Reservoirs Using Thermochemical Fluids. Energy & Fuels. DOI: 10.1021/acs.energyfuels.8b03604.
Henderson, G. D.,Danesh, A.,Tehrani, D. H.,Al-Shaidi, S., & Peden, J. M. 1998. Measurement and Correlation of Gas Condensate Relative Permeability by the Steady-State Method. SPE Reservoir Evaluation & Engineering, Vol.1(2). SPE30770. https://doi:10.2118/30770-PA.
Hoier, L.,Cheng, N.,Whitson, C.H. 2004. Miscible gas injection in under saturated gas-oil systems. Presented at the SPE Annual Technical Conference and Exhibition, 26-29 September, Houston, Texas. SPE 90379. https://doi.org/10.2118/90379-MS
Khan, M. N.,Siddiqui, F. I.,Mansur, S.. 2010. Hydraulic Fracturing in Gas Condensate Reservoirs: Successes, Setbacks and Lessons Learnt. Presented at the SPE/PAPG Annual Technical Conference, Pakistan, 10—11 November.SPE142848. http://dx.doi.org/10.2118/142848-MS.
Marokane, D.,Logmo-Ngog, A.B. and Sarkar, R. 2002. Applicability of timely gas injection in gas condensate fields to improve well productivity. Presented at the SPE/DOE Improved Oil Recovery Symposium, 13-17 April, Tulsa, Oklahoma. SPE75147. http://dx.doi:10.2118/75147- MS.
Odi, U. 2012. Analysis and Potential of CO2 Huff-n-Puff for Near Wellbore Condensate Removal and Enhanced Gas Recovery. Presented at the SPE Annual Technical Conference and Exhibition, 8-10 October, San Antonio, Texas, USA. SPE160917. doi:10.2118/160917-STU.
Sanger, P.,Hagoort, J., 1998. Recovery of gas condensate by nitrogen injection compared with methane injection. SPEJ Vol. 3 (1): 26-33. SPE-30795-PA. https://doi.org/10.2118/30795-PA
Zhengyuan Su,Yong Tang,Hongjiang Ruan,Yang Wang,Xiaoping Wei. 2017. Experimental and modeling study of CO2 - Improved gas recovery in gas condensate reservoir, Petroleum Vol. 3 (1): 87-95, http://dx.doi.org/10.1016/j.petlm.2016.10.004.