@Article{sl.2013.009.087,
AUTHOR = {Chuan Lu, Huiqing Liu, Keqin Lu, Cheng Liu},
TITLE = {Experimental Study of Reasonable Drawdown Pressure of Horizontal Wells in Oil Reservoir with Bottom Water},
JOURNAL = {Structural Longevity},
VOLUME = {9},
YEAR = {2013},
NUMBER = {2},
PAGES = {87--103},
URL = {http://www.techscience.com/sl/v9n2/42906},
ISSN = {1944-6128},
ABSTRACT = {The development effect of horizontal well in oil reservoir with bottom water is extremely sensitive to drawdown pressures. Since water coning is
inevitable, it is significant to analyze the impact of drawdown pressures on post water breakthrough performance of horizontal wells. Based on a small-scale and discretized physical simulation system, the impact of different drawdown pressures, as
well as the influence of changing drawdown pressures in different water cut stage,
on the following indexes is discussed: increasing rates of water cut, oil recovery
difference and displacing efficiency of bottom water. The results show that under
different drawdown pressure, the variation curve between water cut and recovery
degree tends to convex. For the thin oil with relatively high viscosity, it is reasonable to keep relatively large drawdown pressure to decrease water cut increase rate
in medium and low water cut stage. But enlarging drawdown pressure in medium
and high water cut stage is harmful to increase ultimate oil recovery. If the viscosity is further lower, it is beneficial to adopt small drawdown pressure to extend oil
production period with low water cut content. While it is reasonable to increase
drawdown pressure in medium and high water cut stage to improve the flooding
efficiency of bottom water. For the heavy oil, it is acceptable to enlarge drawdown
pressure under the condition of low water cut period.},
DOI = {10.3970/sl.2013.009.087}
}