Influencing factors on bottom water coning are meticulously analyzed for the Dalinghe bottom/edge water reservoir in the Huan17 block. The water coning pattern has been generalized by analyzing reservoir geology and development features and using reservoir engineering and reservoir simulation methods. Experimental results indicate that the farther the distance between interbed and perforation is,the smaller the areal distribution of interbed is,the more prominent the bottom water coning will be;oil/water viscosity ratio,vertical/horizontal permeability ratio and well spacing are all in positive correlation to the decline rate of water cones,in the process of bottom water coning control,the higher the daily mass production of single well is,the faster the decline rate of water cone will be. The change in water cone height mainly takes place in the first four years,so it is suggested to shut in wells and control water coning for four years.
Special Oil & Gas Reservoirs