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Progressive Evolution of Flow and Heat Transfer Channels in Hot Dry Rock Stimulated by Liquid Nitrogen Cold Shock.
ACS Omega
December 2024
School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
Hot dry rock (HDR) is a novel green, low-carbon energy. Its development requires the creation of fracture channels in deep thermal reservoirs. Traditional methods such as hydraulic fracturing have limited effectiveness in reservoir stimulation, so a method of liquid nitrogen cold shock was proposed.
View Article and Find Full Text PDFNumerical modelling of interaction of cemented natural fractures and hydraulic fractures.
Sci Rep
December 2024
College of Geology and Environment, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi, China.
Article Synopsis
- Cemented natural fractures (CNFs) in shale and tight sandstone reservoirs can significantly influence hydraulic fracturing and oil/gas production, but their interaction mechanisms are not fully understood.
- A numerical model using the particle flow method was developed to simulate hydraulic fracture propagation and its interaction with CNFs, showing reliable results that align with previous experimental data.
- The study found that factors like CNF cementation strength, inclination angle, and fluid viscosity can alter fracture propagation patterns, including new behaviors like bifurcation fractures and the development of complex fracture networks.
Evaluation of rheological properties of guar gum-based fracturing fluids enhanced with hydroxyl group bearing thermodynamic hydrate inhibitors.
Int J Biol Macromol
December 2024
Department of Petroleum Engineering, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar, Gujarat 382426, India. Electronic address:
Naturally occurring gas clathrates are a significant methane resource-the primary component of natural gas, regarded as the cleanest hydrocarbon and a key feedstock for producing gray and blue hydrogen. Despite the global abundance of gas hydrate reserves, extraction via depressurization has yet to achieve commercially viable production rates. The primary limitation lies in the low permeability of hydrate-bearing sediments, where solid clathrates obstruct porous pathways, hindering dissociation and slowing gas recovery.
View Article and Find Full Text PDFData-driven assessment of well stimulation in unconventional gas reservoirs.
Sci Rep
December 2024
School of Oil & Natural Gas Engineering, SouthWest Petroleum University, Chengdu, 610500, China.
Unconventional gas reservoirs, characterized by their complex geologies and challenging extraction conditions, demand innovative approaches to enhance gas production and ensure economic viability. Well stimulation techniques, such as hydraulic fracturing and acidizing, have become indispensable tools in unlocking the potential of these tight formations. However, the effectiveness of these techniques can vary widely depending on the specific characteristics of the reservoir.
View Article and Find Full Text PDFResearch on efficient numerical simulation method for integration fracking with production in shale oil reservoir with multi-source data.
Sci Rep
December 2024
School of Petroleum Engineering, Xi'an Shiyou University, Xi'an, 710065, China.
Horizontal well hydraulic fracturing technology has significantly enhanced the productivity of shale reservoirs. However, our understanding of the expansion patterns within the complex fracture network and fluid seepage mechanisms under field conditions remains inadequate. Here, this work develops a dynamic geomechanical (DG) model to simulate the complete sequence of operations in hydraulic fracturing.
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