【摘要】 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。更多还原

【Abstract】 The distance between the injection well and production well is an important parameter in the design of geothermal engineering. This paper takes Songliao basin as an example to research the influence of five points well spacing on temperature field,production well’s flow,thermal extraction ratio,total quantity of heat and CO2 sequestration,and the change features of pressure drop. The result showed that the nearer well spacing,the greater of reservoir temperature and flow, what ’s more, the shorter of the breakthrough time. At an early stage, the production,located close to injection well,has higher heat extraction rate and total quantity of heat,however,their range has much greater,and more volatile. After some time,their heat extraction and total quantity of heat are worse than the far away wells. For large well spacing, it ’s conductive to CO2 sequestration, and that the increase of pressure drop contribute to improve geothermal exploitation.更多还原