期刊
ENERGIES
卷 15, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/en15072359
关键词
fine-grained particle migration; proppant embedment; fracture conductivity loss; weakly cemented reservoir; coal-bed methane reservoir; filtration coefficient
资金
- National Natural Science Foundation of China [51374229]
- Natural Science Foundation of Shandong Province of China [ZR2019MEE101]
A comprehensive model that considers fine-grained particle migration and proppant embedment is proposed in this paper to accurately predict the decline in hydraulic fracture conductivity. Through experiments and simulations, it is found that both fine-grained particle migration and proppant embedment have a negative effect on the conductivity of fractures in weakly cemented sandstone and coal-bed methane reservoirs. The formulated model matches well with experimental data and can be widely used in predicting conductivity decline.
In weakly cemented reservoirs or coal-bed methane reservoirs, the conductivity of hydraulic fractures always declines after a period of production, which greatly influences gas production. In this paper, a comprehensive model considering fine-grained particle migration and proppant embedment is proposed to give a precise prediction for conductivity decline. Then, an experiment was conducted to simulate this process. A published experiment using coal fines was also tested and simulated. The results indicate that both fine-grained particle migration and proppant embedment have great negative effect on conductivity of fractures in weakly cemented sandstone and coal-bed methane reservoirs. The formulation we proposed matches the experimental data smoothly and can be widely used in the prediction of conductivity decline in weakly cemented sandstone and coal-bed methane reservoirs. In order to discuss the influencing factors of the filtration coefficient in the particle transport model, a porous media network model was established based on the theoretical model. The simulation results show that the filtration coefficient increases with the increase in particle size and/or throat size, and the filtration coefficient increases with the decrease in the fluid velocity. At the same time, it was found that the large larynx did not easily cause particle retention. Large size particles tend to cause particle retention.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据