石油科学通报2025，Vol.10Issue(2)：298-308,11.DOI:10.3969/j.issn.2096-1693.2025.02.012
页岩油压闷采渗流机理的格子Boltzmann模拟
Shale oil flow mechanisms during fracturing-soaking-producing process studied by Lattice Boltzmann simulation
摘要
Abstract
Shale oil is one of the most potential and strategic alternative oil resource in China.It's of great significance to clarify the fluid distribution and evolution laws in porous media for enhancing the recovery of shale oil during the fracturing-soak-ing-producing process.In this work,a multi-component multiphase lattice Boltzmann model was adopted to study the shale oil flow mechanism during fracturing-soaking-producing process.Firstly,the accuracy of the model was verified using Laplace's law,contact angle,and stratified flow.Then,based on the scanning electron microscope(SEM)image of Jiyang shale,the struc-ture of the shale porous medium was constructed including the distribution of fracture and matrix pores.Subsequently,the lattice Boltzmann model was used to simulate the fracturing-soaking-producing process of shale porous media,and the fluid distribution characteristics at different stages were analyzed.Then the effects of different soaking time,reservoir wettability and drainage rate were explored further.The results show that the fracturing fluid will seep into the matrix pore and replace the oil phase under the action of capillary force during the soaking stage,and with the increase of soaking time,the backflow rate of fracturing fluid return tends to decrease;the water-wet core has a better development effect than the neutral and oil-wet cores,and the utilization rate of fracturing fluid and the degree of crude oil utilization in the matrix are higher;the higher drainage rate will make the pore pressure drop rapidly,which is not conducive to the development and production of the shale oil.The fluid flow mechanisms during the shale oil fracturing-soaking-producing process are investigated from a pore-scale perspective,which provides support for the formulation of a reasonable production schedule for shale oil wells.关键词
页岩油/格子Boltzmann方法/自发渗吸/纳米孔隙/多组分多相Key words
shale oil/Lattice Boltzmann method/spontaneous imbibition/nanopores/multi-component multiphase分类
能源科技引用本文复制引用
杨雨萱,王森,陈李杨,刘祖鹏,冯其红..页岩油压闷采渗流机理的格子Boltzmann模拟[J].石油科学通报,2025,10(2):298-308,11.基金项目
国家自然科学基金项目(52274055)、泰山学者工程专项经费(tsqn202408088)和山东省自然科学基金项目(ZR2022YQ50)联合资助 （52274055）
