TECHNICAL STRATEGY DISCUSSION FOR GAS-CAP RESERVOIR DEVELOPMENT

There are a variety of development schemes that can be used to exploit gas-cap reservoir, and there are many factors to influence its production performance. According to the basic development rules of gas cap reservoir, based on the realfield data, we studied the reasonable development scheme, injection production ratio, recovery rate, oil rate of well adjacent to GOC and the optimum time to produce gas cap gas. For the first time, the oil loss was calculated and discussed. As a result, a couple of development policy for gas cap reservoir were presented: ①The injection production system should be improved and the gas and oil should produced evenly; ②The oil in oil ring must be first produced, then the gas in gas cap can be produced 4 years later; ③ The oil well adjacent to GOC should be put into production at a low rate;④ The gas and oil should be produced simultaneously if the gas reserve in gas cap is relatively larger than that of oil.