.jpg)
Speaker
Description
The heterogeneities of shale pore system are expressed in terms of the complex pore-fracture structure, different pore type and multi-scale pore size. Fluid transport mechanisms in shale nanopore space notably differ from that in conventional micro-scale porous media. Conventional core-scale multi-phase flow experiments are not applicable to shale because of the nanoscale pore size and the realistic multi-component multi-phase fluid flow patterns in shale are still unknown to a large extent. Therefore it is essential to study the pore-scale fluid transport mechanisms and establish the corresponding flow simulation method.
This work summarizes our recent study on multi-component multi-phase fluid transport mechanisms in shale by pore network modelling and level-set approach. We first constructed the multi-scale pore network model based on dual resolution scanning electron microscope images. The pore network multiphase flow model (PNMFM) in organic pore system is established considering nano-micro scale gas and water transport mechanisms. PNMFM in dual pore type (organic-inorganic) system is further proposed considering the influence of pore type and wettability on gas-water distribution. We further developed a general pore network-based three-phase thermodynamic equilibrium and transport model, which enables accurate prediction of multicomponent hydrocarbon−water transport properties in shale at different temperatures and pressures. Fluid flow in complex fracture systems near wellbore is influenced by heterogeneous fluid pathway structure, proppant distribution, and stress-induced fracture aperture change. To deal with this, we developed the physics-driven level set lattice Boltzmann method -coupled model to study multiphase flow properties in complex fractures during injected water flowback and proposed the upscaled relative permeability models of induced fracture network and hydraulic fracture with proppant.
| References | [1] Song, W., Yao, B., Sun, H., Yang, Y., Zhong, J., & Yao, J. (2023). Nanoscale Three-Phase Transport in a Shale Pore Network with Phase Change and Solid–Fluid Interaction. Energy & Fuels. 37 (18), 13851-13865. [2] Song, W., Prodanović, M., Yao, J., & Zhang, K. (2023). Nano-scale wetting film impact on multiphase transport properties in porous media. Transport in Porous Media, 149(1), 5-33. [3] Song, W., Prodanovic, M., Santos, J. E., Yao, J., Zhang, K., & Yang, Y. (2023). Upscaling of Transport Properties in Complex Hydraulic Fracture Systems. SPE Journal, 28(03), 1026-1044. [4] Song, W., Liu, L., Wang, D., Li, Y., Prodanović, M., & Yao, J. (2019). Nanoscale confined multicomponent hydrocarbon thermodynamic phase behavior and multiphase transport ability in nanoporous material. Chemical Engineering Journal, 122974 [5] Song, W., Yao, J., Wang, D., Li, Y., Sun, H., Yang, Y., & Zhang, L. (2019). Nanoscale confined gas and water multiphase transport in nanoporous shale with dual surface wettability. Advances in Water Resources. |
|---|---|
| Country | China |
| Conference Proceedings | I am interested in having my paper published in the proceedings. |
| Acceptance of the Terms & Conditions | Click here to agree |
