Easy Determination of Water Influx in Reservoirs

This p aper presents two methods for easy determination of water influx in reservoirs based on the material balance theory of reservoirs,i.e.,the Net Production V olume Curve,and the Production Index Curve.These methods can be used for esti-ma tion of water influx in reservoirs without any assumption of aquifer shape and size by applying the production performance data.Hence the tedium of the c onventional trial-and-error calculations and obvious uncertainty could be over come in ap plication of the easy and practical new methods.