Optimization Of Cycle Gas Injection Development Parameters In G Condensate Gas Reservoir

The G reservoir is a reservoir with a condensate gas cap and an oil ring.The development method is very complicated,and it is necessary to simultaneously increase the recovery rate of natural gas,condensate and crude oil.In the early stage of the G Oilfield,the oil ring was first developed.With the development of the formation pressure,the oil and gas boundary expanded,the production wells became gas,the gas-oil ratio increased rapidly,and the condensate gas top appeared anti-condensation phenomenon,which was lost in the formation.in.Therefore,it is necessary to explore the gas injection method in the development to improve the condensate recovery rate,and block the oil and gas mutual enthalpy,and obtain better development results.This study first analyzes the development characteristics of G reservoirs,and deeply analyzes the fluid properties and composition characteristics of crude oil and gas capping gas,and determines the properties of condensate with high gas cap.Secondly,based on the geological characteristics of the study area,the typical well group model of the reservoir is selected,and the reasonable evaluation indicators are selected in combination with the actual development of the reservoir to determine the influencing factors and parameter ranges such as oil production speed and gas production speed,and the main control factors affecting the development are obtained.Then,the reasonable injection and production parameters of the typical well group model of G reservoir are optimized to form the technical map of the development of the G-zone reservoir.Finally,the technical countermeasures for the rational development of the oilfield are proposed.In this paper,the development parameters of the gas injection mode in the condensate gas reservoir are studied.How to make full use of the formation energy in the development of G reservoir,realize the coordinated development of gas cap oil ring,reduce the loss of condensate and improve The degree of oil ring,condensate and gas cap gas recovery has important guiding significance.