Showing papers in "Journal of Natural Gas Science and Engineering in 2014"

TL;DR: In this paper, the authors describe key factors influencing erosion and reviews available erosion equations, and discuss empirical and mechanistic models for erosion prediction in pipelines, which are used by oil and gas companies to limit the maximum production flow rates and avoid excessive erosion damage.

TL;DR: In this paper, the effects of liquid nitrogen cooling on rock pore structure, sandstone, marble, and shale samples were examined before and after treatment using scanning electron microscopy and nuclear magnetic resonance.

TL;DR: Based on the FHH model, the fractal characteristics of 58 coals from 14 mining areas in the eastern margin of the Ordos Basin, China are analyzed in this paper, and the results show that the DS ranges from 2.22 to 2.77 for the 58 coal, except for six samples with plots Type P4, for which correct DS could not be obtained.

TL;DR: The Lower Silurian Longmaxi Formation is a key target for shale-gas exploration in South China and comprises organic-rich black shale unit deposited in an anoxic deep-water setting Mineral components are dominated by quartz and clay minerals with minor amounts of plagioclase, potassium feldspar, calcite and pyrite as discussed by the authors.

TL;DR: In this article, the authors investigated the nature of helium permeability change on 14 coal cores under a varying effective stress from 4 to 12 MPa in laboratory, and found that the gas permeability of coals varies with effective stress increase, matrix shrinkage/swelling due to gas desorption/adsorption, gas slippage and other factors.

TL;DR: In this article, a series of experiments using a triaxial loading system were conducted to investigate the effect of pulse frequency on the fracture propagation and extension during PHF, and the relationships between frequency and pressure amplitude, fracture initiation pressure and duration were discussed.

TL;DR: In this paper, the authors used two-phase flowback data of three multifractured horizontal wells to understand the physics of flowback and developed a simple analytical model to compare the pressure/rate transient behavior of the three flowback cases, which can be interpreted to evaluate the fracturing operations and to complement the conventional production data analysis for a more comprehensive fracture characterization.

TL;DR: The interaction and the coupling of slip-flow of gases, a fluid dynamic phenomenon, and the cleat volume compressibility, a poro-elastic effect, have been investigated on two sister samples from the Taroom coal measure, Surat Basin, Queensland Australia as discussed by the authors.

TL;DR: In this paper, a quadrilinear flow model (QFM) is proposed which relaxes the sequential-depletion assumption and allows simultaneous matrix-MF and matrix-HF depletion, the matrix volume is conceptually divided into two subdomains; one feeds HF and the other feeds MF.

TL;DR: Results from present study show that implementation of LSSVM can lead to more accurate and reliable estimation of natural gas compressibility factor.

TL;DR: Li et al. as discussed by the authors investigated the CBM geology and accumulation characteristics of No.4 coal in the Permian Shanxi Formation in the Liulin area based on data from 29 coal mining wells, 25 CBM wells and 14 coal samples.

TL;DR: In this article, a series of natural amino acids which are environmentally friendly and biodegradable have been tested as hydrate crystal growth kinetics inhibitors for THF (tetrahydrofuran) hydrate formation.

TL;DR: In this paper, the effect of synthesis method (impregnation and so-gel) as well as Co and Cu addition on the catalytic and physicochemical properties of Ni/Al 2 O 3 -ZrO 2 nanocatalyst was evaluated in dry reforming of methane.

TL;DR: In this article, the pore size distribution after the treatment of hydraulic slotting and methane pre-drainage was investigated by testing the seven coal samples obtained from the coal seam #10 of Yangliu Mine.

TL;DR: A new stochastic approach for drilling trajectory design applying continuous particle swarm algorithms to find the optimum drilling measured depth of directional and horizontal wells in 3-D space is introduced.

TL;DR: In this paper, the authors investigated the impact of income, real natural gas prices and the underlying energy demand trend (UEDT) on OECD-Europe natural gas consumption by applying the structural time series technique to annual data over the period 1978 to 2011.

TL;DR: For the purpose of assessing methane sorption capacity, degree of conversion of organic matter and hydrocarbon prospectivity, twenty one borehole shale samples of the Lower Permian Barakar Formation were studied from the West Bokaro and Raniganj basins in India as discussed by the authors.

TL;DR: In this paper, a mathematical model for shale gas flow in matrix and fracture networks, and also for their mass transfer in between without neglecting its varying-scale nature following the concept of discrete fracture network (DFN).

TL;DR: In this article, a suitable alkanolamine solution is selected for the sweetening of natural gas produced from one of Iranian gas fields, and the selected alkanolamines solution is simulated with Aspen hysys simulator and economically evaluated with aspen economic analyzer.

TL;DR: In this paper, the performance and emission parameters of a single cylinder four-stroke CRDI engine under CNG-diesel dual-fuel mode have been modeled by Artificial Neural Network.

TL;DR: In this paper, a series of methane desorption measurements were conducted on pulverized Chinese coal samples and diffusion kinetics were modeled using the unipore model and the bidisperse model.

TL;DR: In this paper, the maximum gas pressure and gas content measured in these seams are 5.5 MPa and 25.0 m3/t, respectively, and several large-scale gas outburst accidents have occurred there.

TL;DR: In this paper, the authors presented two improved algorithms based on machine learning approaches for efficient estimation of saturation pressure of reservoir oil, which showed good performance in terms of accuracy with the lowest error percentage and highest R 2 values.

TL;DR: In this article, a copolymer was used as a selective layer to prepare a PVC/Pebax composite membrane for CO2 capturing, and the authors investigated the gas permeation and transport characteristics of single and mixed gases.

TL;DR: In this article, the authors examined the waste streams from hydraulic fracturing (HHF) development in the Marcellus formation and proposed protective measures that would minimize exposure, and found that flowback, drilling muds, and HHF fluids all exceeded SDWA limits to varying degrees.

TL;DR: In this article, the performance of different production methods using TOUGH++HYDRATE (T+H) simulator for simulation of the natural gas hydrate (NGH) production process trial was analyzed.

TL;DR: In this article, two types of experiments are performed; first, visualization experiment in Hele-Shaw cell; and second, quantitative experiments at elevated pressure, to investigate the effect of density-driven convection on CO 2 dissolution rate in saline aquifers.

TL;DR: In this article, the economic evaluation of natural gas hydrate (NGH) chain including production, transportation and re-gasification was carried out in an industrial scale with a capacity of about 2.6 million cubic meters of hydrate per year.

TL;DR: In this article, an anthracite and three bituminous coals were extracted with tetrahydrofuran (THF) solvent at 50°C and atmospheric pressure by microwave-assisted extraction.

TL;DR: In this article, a 2D mass transfer model was developed to investigate the effect of membrane properties on the absorption performance of CO2 from flue gas in a gas-liquid hollow fiber membrane contactor.