Summary
The research highlights challenges in traditional hydraulic fracturing and presents findings on how to enhance hydraulic fracturing performance and shale reservoir productivity. Traditional fracturing methods often struggle with forming complex fracture networks and reaching remote well zones. Most studies focus on constant pump rates in homogeneous reservoirs, but this approach doesn’t maximize stimulated reservoir volume (SRV) in shale reservoirs with natural fractures. Various simulations using response surface methodology have shown that employing variable pumping rates can increase SRV by 17% compared to constant rates. This method provides a framework for optimizing pump rates, improving hydraulic fracturing efficiency, and boosting shale oil production. Simultaneously, horizontal well hydraulic fracturing is pivotal in developing shale gas due to the reservoirs' low permeability and porosity. Previous models frequently overlooked the effect of gas dynamic viscosity on post-fracturing productivity. By using a new flow model incorporating multiple media and permeability alongside Lee's correlation for gas viscosity, the study verified its accuracy against Barnett Shale data. It was found that increased reservoir damage significantly reduces productivity, while enhancing stimulation intensity can boost it by over 25%. Fracture spacing is another critical factor; narrow spacings can decrease productivity by about 25%, while larger spacings result in varying productivity increases. This research offers crucial insights into optimizing fracturing processes and improving gas productivity from horizontal wells in shale gas reservoirs.
Variable pumping rates increase stimulated reservoir volume by 17% compared to constant rates. This method enhances hydraulic fracturing and shale oil production effectiveness.
Published By:
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2025
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