Showing papers in "Journal of Natural Gas Science and Engineering in 2021"

TL;DR: A hybrid intelligent algorithm method that combines support vector regression, principal component analysis, and chaos particle swarm optimization is proposed to predict the corrosion rate of the multiphase flow pipeline, named PCA-CPSO-SVR, which has a good performance.

TL;DR: In this paper, the 3D pore-fracture systems of tight rock are reconstructed based on the representation unit volume (REV) of the intact tight sandstone and fractal fracture.

TL;DR: A novel combined model that integrates local mean decomposition, wavelet threshold denoising, and long short term memory methods to predict short-term gas consumption, or “LMD-WTD-LSTM”, which has an excellent performance in daily natural gas prediction.

TL;DR: In this paper, the authors explored the potential of liquid nitrogen fracturing in three different coal ranks and found that the porosity evolution for bituminous and sub-bituminous coal in micro-scale was 14% and 119% respectively.

TL;DR: The physics of proppant transport in fractured reservoirs is of great interest to the oil and gas industry; nevertheless, the outcomes are controversial as mentioned in this paper, and the results are controversial.

TL;DR: The review results show that, affected by the development of computer science and AI technology, short-term forecasting is the fastest-growing forecasting horizon, followed by long-term and medium-term, and AI-based models present the best performance.

TL;DR: Wang et al. as mentioned in this paper explored other unique factors resulting in China's success by reviewing the history and experience of Chinese developers and found that the development of shale gas is less related to company size and is more related to a company's goals and motivations.

TL;DR: In this article, a comprehensive machine-learning approach is developed to forecast the shale gas production via the integration of geological and operational factors, and the results show that the factors that mostly contributed to the production are found to be total fluid injection, total proppant mass, well TVD, permeability, y coordinate, porosity, gas saturation, number of stages, x coordinate, formation pressure, horizontal length, distance to fault and Duvernay thickness.

TL;DR: In this paper, a new blowdown system improvement scheme is proposed, and the erosion of the blowdown valve after the scheme operation is simulated and the results show that the maximum erosion rate of the improved Blowdown valve is 1024×10−6kg/(s·m2), and the converted annual erosion thickness is 574μm, which is 26538-61247mm compared to the unimproved sewage valve.

TL;DR: In this paper, the authors summarize and review the excellent numerical achievements contributed by Chinese research groups on natural gas production from hydrate-bearing reservoirs (HBRs) up to now, and put forward some suggestions for future directions in numerical studies of natural gas hydrates in China from their own point of view.

TL;DR: In this article, mixed matrix membranes (MMMs) were fabricated by incorporating Fe pillared Cloisite 15A (P-C15A) at different loading percentage of 0.1-1.5% within the polysulfone (PSf) matrix.

TL;DR: In this article, an integrated indirect permeability prediction method was developed by combining the petrophysical rock typing methods (FZI or FZI*) with the PSO-SVM algorithm that hybridized the particle swarm optimization (PSO) and support vector machines (SVM).

TL;DR: In this article, the authors used the numerical calculation software ANSYS/LS-DYNA to study the dynamic response and realize the safety control of the buried corroded gas pipelines under the action of blasting vibration for the safety of engineering construction.

TL;DR: In this paper, a review of ZIF-8 and its derivatives for the purpose of carbon dioxide and hydrocarbon separations is presented, which provides the use of statistical physics theoretical approach and considers the effect of nanogate opening pressures.

TL;DR: In this paper, coal samples were heated in different gas atmospheres; isothermal adsorption, scanning electron microscopy, and proximate analysis were conducted to study the evolution of coal adaption characteristics during heat treatment.

TL;DR: In this paper, the authors analyzed the failure of gas wells in Northwest Oilfield and provided corresponding methods to solve the issue and concluded that the P110ss steel should be selected as tubing in the failed well at a depth of 5086.4m and nickel base alloy steel at 6447m.

TL;DR: In this article, the authors measured the entire process of coal deformation induced by gas injection, and further obtained the diffusion-dependent curve of coal permeability against time by modifying the typical pressure-pulse-decay approach.

TL;DR: In this article, the authors investigated the application of surfactants and nanomaterials as additives to water-based drilling fluids and anti-swelling agents for drilling operations and found hydrogen bond, clay surface coating, and ionic bond to be the major inhibition mechanisms.

TL;DR: In this paper, a detailed study based on availability of sedimentological (petrography, SEM and XRD), well log data (gamma ray, neutron, density, sonic, shallow and deep resistivity, PEF and RFT logs), in addition to conventional and special core analysis data for Mt Messenger reservoir is presented.

TL;DR: In this paper, a k-epsilon model was implemented to solve gas flow behavior and Discrete Phase Model (DPM) was used to track solid particles to determine the point on the Standalone screen (SAS) surface, where erosion rate is critical and to evaluate the uncertainties in the calculations and predictions of sand screen erosion utilizing CFD numerical simulation.

TL;DR: In this paper, the hydrate formation in surfactants with different ratios of alkyl glycosides (APG) and sodium dodecyl sulfate (SDS) was studied at 275.15 K and 7 MPa.

TL;DR: In this article, the formation and evolution of shale pores during hydrocarbon generation process, organic geochemistry, X-ray diffraction, field emission scanning electron microscopy (FE-SEM), and low-pressure nitrogen gas adsorption (N2GA) were applied to samples created by thermal simulation and to naturally evolved samples of the Upper Permian Dalong Formation in the northwestern Sichuan Basin.

TL;DR: In this paper, a review is conducted on the induced hydraulic fracture behaviors and interaction processes in laboratory test and theoretical analysis, including the effects of a series of parameters on the fracture behaviours, interaction modes, and interaction mechanism.

TL;DR: In this article, the authors quantitatively evaluated the CH4 adsorption behaviors by a series of experiments and the applicability of different models in different rank coals (0.48-2.59% of Ro,m).

TL;DR: In this paper, the effective pore radius of Winland (r35) is applied based on mercury injection capillary pressure plots (MICP) to assess the pore volume, connectivity, and conductivity.

TL;DR: In this paper, a series of low-temperature nitrogen ad-/desorption experiments and nuclear magnetic resonance measurements were conducted to comparatively analyse the evolution of the coal pore structure after treatment.

TL;DR: In this paper, a poroelastic porosity and permeability model for triple-continuum incorporating desorption-induced deformation, Knudsen diffusion, and viscous flow was established by the robust occurrence calculation method based on the RANSAC algorithm.

TL;DR: In this article, a hybrid method based on gas hydrate crystallization and membrane gas separation was proposed as an alternative approach to Xenon (Xe) recovery from natural gas.

TL;DR: A thorough review of foam-based hydraulic fracturing fluids with a focus on both theory and applications is provided in this paper, where the types of foam fracture fluids based on the liquid phase and their applications are illustrated.

TL;DR: In this paper, a comprehensive characterization method based on computed tomography (CT) 3D reconstruction, Nuclear Magnetic Resonance (NMR) T2 spectrum and Nuclear Magnetic Imaging (NMI) is proposed.