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以松辽盆地为研究场地,采用数值模拟方法,研究五点布井法在不同井间距条件下,温度场、生产井流量、热提取率、累计热量、CO2封存量及压力降的变化特征。结果表明,注入井与生产井相距越近,储层的温度、流量变幅越大,稳定生产期和热突破时间越短;系统运行初期,具有较高的热提取率和累计热量,但其变化较大,不稳定。运行一段时间后,注入井与生产井井距近的系统热提取率和累计热量比井距较远的低。生产井与注入井之间压力降的增加有助于提高地热开采。从CO2储存角度看,生产井与注入井的井间距远有助于CO2的封存。
Taking Songliao Basin as a research site, the numerical simulation method was used to study the variation characteristics of temperature field, production flow rate, heat extraction rate, accumulated heat, CO2 storage and pressure drop under different well spacing conditions. The results show that the closer the injection well is to the production well, the larger the temperature and the flow amplitude of the reservoir are, the shorter the stable production period and the thermal breakthrough time are. The higher the heat extraction rate and the cumulative calorific value are in the initial stage of system operation, Vary, unstable. After a period of operation, the rate of heat extraction and the cumulative heat of the injection system near the well spacing of the producer well are far lower than that of the well. Increasing the pressure drop between the production well and the injection well helps to increase geothermal production. From the point of view of CO2 storage, the well spacing between production well and injection well contributes to the storage of CO2.