Application of Pressure Transient Analysis and Rate Transient Analysis to Dynamic Evaluation on Dry-Gas Reinjection in a Gas Condensate Reservoir with Strong Aquifer Support
- Li Yong (Research Institute of Petroleum Exploration and Development, PetroChina) | Zhang Jing (Research Institute of Petroleum Exploration and Development, PetroChina) | Jiao Yuwei (Research Institute of Petroleum Exploration and Development, PetroChina) | Li Baozhu (Research Institute of Petroleum Exploration and Development, PetroChina) | Xia Jing (Research Institute of Petroleum Exploration and Development, PetroChina) | Xie Wei (Tarim Oilfield Company, PetroChina)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Caspian Technical Conference & Exhibition, 1-3 November , Astana, Kazakhstan
- Publication Date
- Document Type
- Conference Paper
- 2016. Society of Petroleum Engineers
- 5.6.3 Pressure Transient Analysis, 5.6.4 Drillstem/Well Testing, 5.6.3 Pressure Transient Testing, 5.8.2 Shale Gas, 5.4.2 Gas Injection Methods, 5.8.8 Gas-condensate reservoirs, 5.6 Formation Evaluation & Management, 5 Reservoir Desciption & Dynamics, 5.8 Unconventional and Complex Reservoirs, 5.2 Reservoir Fluid Dynamics, 4.6 Natural Gas, 4.6 Natural Gas, 5.4 Improved and Enhanced Recovery
- 0 in the last 30 days
- 135 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 8.50|
|SPE Non-Member Price:||USD 25.00|
For gas condensate reservoirs with high condensate content, cyclic dry-gas reinjection is usually adopted to improve recovery. But cyclic gas reinjection gradually changes the composition and distribution of reservoir fluid, which causes much more difficulties for dynamic evaluation of this kind of reservoirs, especially for the reservoirs with strong bottom or edge aquifer support. This paper presents the dynamic evaluation on dry-gas reinjection in a gas condensate reservoir with strong aquifer support.
The method mainly involves pressure transient analysis and rate transient analysis (RTA). Firstly, pressure transient data are interpreted, and reservoir properties and its variation are evaluated. Then all wells are classified into different types based on well test log-log curve shape and its change. Furthermore, all producers are also analyzed based on RTA, and RTA type curve characteristics and diagnostics for different type of wells are also determined. Finally, results and understandings interpreted from surveillance data are analyzed and compared, from which reasons for well performance variation are determined.
This new method has been applied to Y gas condensate reservoir in China. The massive cyclic dry-gas injection of Y reservoir started in 2001, and current gas condensate recovery is higher than 40%. A total of 145 pressure build-up tests were conducted since then. Through detailed interpretation, reservoir properties and their variation behavior, such as permeability, skin factor, aquifer distance, etc. were evaluated. Based on analysis of the results, producers are classified into four types: performance no change type, condensate banking type, aquifer influx type, and injection gas breakthrough type. Furthermore, the 4 types of producers are also identified based on the type curve diagnostic of rate transient analysis. Through detailed comparison of results from the two methods, the reasons for the difference of different type of wells are analyzed and determined in combination with other production data and surveillance data. The understandings are used for cyclic gas injection adjustment, which improves the performance of Y gas condensate reservoir.
This systematic technique has been successfully applied to Y gas condensate reservoir in Tarim Basin of China, which properly and correctly evaluates the reservoir properties around both producers and injectors. It also provides a reliable method for decision making of cyclic gas injection adjustment, such as producer conversion, well infilling, etc., which is helpful for effective and economic development of this kind of reservoir.
|File Size||3 MB||Number of Pages||13|
Diamond, L., & Rondon, C. R. (1990, January 1). Simulation studies of Gas-Injection into Gas-Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/21060-MS.
Sänger, P. J., Bjørnstad, H. K., & Hagoort, J. (1994, January 1). Nitrogen Injection Into Stratified Gas-Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/28941-MS.
Pires, A. P., Correa, A. C. F., Mohamed, R. S., & Sousa, R. (1995, January 1). Optimization of Lean Gas Injection in Gas-Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/31004-MS.
Cruz Lopez, J. A. (2000, January 1). Gas Injection As A Method For Improved Recovery In Gas-Condensate Reservoirs With Active Support. Society of Petroleum Engineers. doi:10.2118/58981-MS.
Taheri, A., Hoier, L., & Torsaeter, O. (2013, June 10). Miscible and Immiscible Gas Injection for Enhancing of Condensate Recovery in Fractured Gas Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/164934-MS.
Siddiqui, M. A. Q., Alnuaim, S., & Khan, R. A. (2014, November 10). Stochastic Optimization of Gas Cycling in Gas Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/172107-MS.
Evans, E., Ghalambor, A., & Orangi, A. (2016, February 24). CO2 Injection to Mitigate Condensate Banking in a Low-Permeability Reservoir. Society of Petroleum Engineers. doi:10.2118/178951-MS.
Barrios, K., Stewart, G., & Davies, D. (2003, January 1). A Novel Methodology for the Analysis of Well Test Responses in Gas Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/81039-MS.
Denney, D. (2004, February 1). Well Testing: Analysis of Well-Test Responses in Gas/Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/0204-0061-JPT.
Aluko, O. A., & Gringarten, A. (2009, January 1). Well Test Dynamics in Rich Gas Condensate Reservoirs Under Gas Injection. Society of Petroleum Engineers. doi:10.2118/121848-MS.
Kgogo, T. C., & Gringarten, A. C. (2010, January 1). Comparative Well-Test Behaviours in Low-Permeability Lean, Medium-rich, and Rich Gas-Condensate Reservoirs. Society of Petroleum Engineers. doi:10.2118/134452-MS.
Jiao, Y., Li, B., Li, Y., & Xie, W. (2010, January 1). The Dynamic Analysis of Dry-Gas Reinjection in a Waterdrive Gas-Condensate Reservoir-Case Study: Yaha Gas-Condensate Reservoir, Tarim Basin, West China. Society of Petroleum Engineers. doi:10.2118/131876-MS.
Ayala, L. F., & Ertekin, T. (2005, January 1). Analysis of Gas-Cycling Performance in Gas/Condensate Reservoirs Using Neuro-Simulation. Society of Petroleum Engineers. doi:10.2118/95655-MS.
Hsieh, F. S., Vega, C., & Vega, L. (2002, January 1). Material Balance as a Horizontal Line for a Gas-Condensate Reservoir. Society of Petroleum Engineers. doi:10.2118/75516-MS.