Buildup well test analysis for ultra-low permeability reservoir

作者：Jiang Ruizhong^*; Li Linkai; Yang Ming; Wang Gongchang; Zhang Jianguo

来源：Journal of Basic Science and Engineering, 2013, 21(2): 336-344.

DOI：10.3969/j.issn.1005-0930.2013.02.015

• Finite different methods
• New mathematical model
• Nonlinear flow
• Pressure derivatives
• Start-up pressure gradient
• Ultra-low permeability reservoirs
• Well test interpretation
• Well-test analysis

Based on a new mathematical model for ultra-low permeability reservoir, well testing model considering moving boundary was established and solved by finite different method, drawdown and buildup type curve was analyzed. The results show that pressure and pressure derivative curves for both the new model and pseudo pressure gradient model become upwarp during radial period in contrast with Darcy model. Compared with pseudo pressure gradient model, the upwarp extent for the new model is gentle. The upwarp extent increases with the increase of c1D or c2D when the sum of c1D and c2D is not constant. While the upward degree increases with the increase of c1D and the decease of c2D when the sum of c1D and c2D is constant. There is a big difference between pressure drawdown and buildup curves. Typical curve should be established individually for well test interpretation.

• 出版日期2013
• 单位中国石油大学（华东）