The Research On Development Technology And Countermeasures Of JZ25-1S Gas Cap Reservoir With Side Water

The gas cap reservoir with side water is a kind of special reservoir,and its reservoir structure is divided into three parts: gas cap,oil ring and side water.In the development process of gas cap reservoir with side water,the interaction between the three energy sources makes the process more difficult than other reservoirs.Therefore,the goal of this paper is to ensure the balance of gas cap,oil ring and side water,and find out the most reasonable method of development and the injection and mining parameters for the gas cap reservoir with side water.In this paper,JZ25-1S gas cap reservoir with side water is taken as the research object.Combined with the characteristics of the actual reservoir address,we propose three typical gas-cap oil reservoir models,and establish the corresponding numerical model.With these numerical models,we study the effect of the three main factors on the development process,include the gas roof index,the oil layer thickness and the permeability.Based on the single factor analysis,the multi-factor analysis is carried out.Combined with exhaustion development and area flooding,we study the adaptability of different development regimes of gas cap reservoir with side water under different conditions.,and optimum charts of different development regimes are obtained which can guide selection of development regime of gas cap reservoir with side water.Under the different development regimes,we study reasonable injection production parameters of gas cap reservoir with side water from oil production rate,gas production rate,injection-production ratio,and obtain the rational collocation of injection production parameters.Combined with the characteristics of the actual reservoir address,we discuss the direction of tapping the potentials and rational and development technology countermeasures from water injection timing and water flooding regime.