Study On Evaluation Of Dynamic Reserves In S-Karst Body Reservoirs

Due to the lack of precision in structure,horizon,and fault interpretation of fracture-cavity carbonate reservoirs in S,the geologic origin of the reservoir is complex and geological modeling is difficult,compared to the sandstone reservoir,reservoir space development,fluid distribution,oil-water interface uncertainty exists fracture affects the connectivity of unknown problems that limits the dynamic reserves,reservoir water energy evaluation,rational development and efficient,scientific,serious impact on oil.Therefore,it is necessary to study the dynamic analysis method of S fractured-cavity reservoir,use dynamic data to study the reservoir,and explore the reservoir reserves and water energy.Based on the existing data,the author has established a well-to-well connectivity evaluation procedure that combines well test analysis,disturbance-like well test analysis,fluid property analysis,the combination of temperature gradient test analysis and PVT change analysis for well production fluid vertical.The source assessment process determines the cross-well cross-connectivity and the source of longitudinal production fluids in the Well-1 well area in S.At the same time,establishing multiple methods(production indicator curve,pressure drop well test analysis,pressure recovery well test analysis),multi-level(single well,The combined method of dynamic reserves evaluation of well group)and multi-data(production dynamic data,test data)to determine the dynamic reserves of single well,well group and block in the well block of in the S1 well area.A new method was established to determine the ratio of water to oil with the multi-round well test interpretation curve,and the ratio of water to oil in well SHB1-1H was determined.Finally,At last,the analysis process of dynamic reserves and water energy is established by using dynamic data of fractured carbonate reservoir,and the suggestion of data admission is put forward.