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Combining precursor incidents investigations and QRA in oil and gas industry
Quantitative risk analyses Investigation Precursor incident Oil and gas industry
2012/4/16
Accident investigation is the collection and examination of facts related to an occurred specific incident. Quantitative Risk Analysis (QRA) is the systematic use of available information to identify ...
Research on Leakage Detection and Analysis of Leakage Point in the Gas Pipeline System
Leakage Detection Transient Simulation Leakage Location SCADA
2013/1/28
Recently, with large-scale use of natural gas and massive constructions of gas pipelines, more and more public concern is focused on pipeline leakage. The leakage caused by holes on gas pipelines gene...
Quantitative risk analysis of oil and gas drilling, using Deepwater Horizon as case study
Quantitative risk analysis Blowout Deepwater Horizon
2012/4/22
According to the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling, the Macondo blowout requires a reassessment of the risks associated with offshore drilling. The Commis...
Safety line method for the prediction of deep coal-seam gas pressure and its application in coal mines
Gas pressure Measuring principle Prediction method Safety line Coal and gas outburst
2012/4/14
Gas pressure is an important index for evaluating the outburst risk and determining the gas content in coal seams. It is recommended to predict coal-seam gas pressure of the workface at deep levels be...
Real-time numerical simulations and experimental research for the propagation characteristics of shock waves and gas flow during coal and gas outburst
Coal and gas outburst Shock wave and gas flow Propagation characteristics Cross roadway
2012/3/31
When coal and gas outburst occurs, high-speed gas flow and air shock wave with high kinetic energy could be created. In this paper, the formation process of outburst shock waves and gas flow has been ...
Study on difference of outburst elimination effect between sub-layers of soft coal and hard coal under the condition of gas per-drainage q
Soft coal Hard coal Drainage gas of coal seam Effect of outburst elimination Difference
2012/3/28
The effect of drainage and outburst elimination are obviously different between soft and hard coal sub-layers under per-drainage of coal seam, and hence, the location of per-drainage borehole related ...
Experimental investigation on the seepage law of pressure-relieved gas under the influence of mining
Pressure-relieved gas Seepage Stress distribution Simulation experiment
2012/3/27
The stress distribution characteristics of the coal seam floor and the variation of pressure-relieved gas seepage velocity along with working face being advanced were studied experimentally. According...
Investigation into the nonlinear damage model of coal containing gas
Nonlinear Damage model Coal containing gas Outburst of coal and gas
2012/4/12
By taking the nonlinear deformation properties of coal into consideration, the nonlinear constitutive equation was founded. And in view of the compressible property of gas, the idea of compressive ene...
On some studies about the dynamic mechanisms of carbon monoxide flow and diffusion during high energy gas fracturing
Low permeability High energy gas fracture CO flow/diffusion Numerical model
2012/4/12
High energy gas fracturing (HEGF) technique has been one of central stimulating measures to enhance oil recovery in low permeability reservoirs. But, in recently few years, some serious CO poisoning a...
Research and application of drainage parameters for gas accumulation zone in overlying strata of goaf area
Overlying stratus in goaf area Annular fissure circle Gas drainage Parameters
2012/3/28
While coal seam is being mined, an annular fissure circle with gas accumulation will be formed in the fissure zone as a result of desorption, dissipation and permeation of gas in the goaf area and ove...
Theoretical equation of gas desorption of particle coal under the non-uniform pressure condition and its analytical solution
Particle coal The theoretical equation of gas desorption The non-uniform pressure condition Analytical solution
2012/3/31
Based on the second Fick’s law, the theoretical equation of gas desorption of particle coal under the nonuniform pressure condition was developed in this paper. The analytical solution of the theoreti...
Mechanism research on coal and gas outburst during vibration blasting
Coal and gas outburst Vibration Adsorption Fracture
2012/3/28
The coal and gas outburst results from plenty of factors, while vibration is the most important factor among them. Therefore, the influences of vibration acting on gas desorption and coal structure ha...
The influence of gas storage parameters on gas emission rate from borehole
Borehole Gas flow rate Gas storage Original gas pressure Permeability coefficient
2012/3/31
Gas emission rate from borehole is one of the most important indexes for the coal and gas outburst prediction. The mathematical model of gas flow in the coal seam, gas flow into the measuring chamber,...
The propagation speed of the cracks in coal body containing gas
Coal body Gas Crack Propagation speed
2012/4/12
The destabilization of coal body containing gas that is caused by the quick propagation of the cracks in coal body containing gas and the high pressure gas, which result into coal and gas outburst. Th...
Numerical simulation and study on the transmission law of flame and pressure wave of pipeline gas explosion
Pipeline Gas explosion Flame Pressure wave Transmission laws FLUENT
2012/3/31
Based on FLUENT simulation software, the laws of transmission of flame and pressure wave in pipeline gas explosion were studied. It turned out that, the maximum pressure value of the explosion point i...