【摘要】 根据吉林松原油页岩原位开采试验的布井方式、油页岩及流体物性参数等情况,构建了油页岩原位开采的单压裂隙-单注气井基本模型(模型Ⅰ),采用Fluent软件进行了油页岩热流体加热过程温度场模拟。为了研究不同原位开发方案的效率,在模型Ⅰ的基础上,通过增加压裂隙数、注气井数,建立了双压裂隙-单注气井模型(模型Ⅱ)、双压裂隙-双等深注气井模型(模型Ⅲ)和双压裂隙-双不等深注气井(模型Ⅳ),分别开展了注气速率为5、10 m/s及注气加热1 500 d情况的模拟。模拟结果表明,当油页岩层压裂程度越高、模型注气速率越高、注气井数量足够和注气井贯穿压裂隙加热油页岩层时,油页岩的开发利用越彻底,设计方案最优。更多还原

【Abstract】 According to the well placement method,oil shale and fluid property parameters of the in-situ mining test of oil shale in Songyuan Jilin,the basic model of single-fracture-single gas injection well( model Ⅰ) for oil shale in situ mining was constructed,and the temperature field simulation of oil shale hot fluid heating process was carried out using Fluent software. In order to study the efficiency of different in-situ development schemes,on the basis of model Ⅰ,by adding the number of fracturing gaps and the number of gas injection wells,a double-fracturesingle gas injection well model( model Ⅱ) and a double-fracture-double equal-depth gas injection well model( model Ⅲ) and double-fracture-double unequal-depth gas injection wells model( model Ⅳ) were established.Simulations of the gas injection velocity of 5 m/s and 10 m/s and the gas injection heating for 1 500 d were carried out. The simulation results show that optimal scheme should be designed by increasing the degree of oil shale fracture,the velocity of model gas injection and the number of gas injection wells,and passing the gas injection well through the fracture gap to heat the oil shale layer,which can thoroughly develop and utilize oil shale.更多还原