scholarly journals Effects of interactions in natural gas/water/rock system on hydrocarbon migration and accumulation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Lin Jiang ◽  
Wen Zhao ◽  
Jianguo Huang ◽  
Yang Fan ◽  
Jiaqing Hao
Keyword(s):  
Numerical Simulation ◽  
Contact Angle ◽  
Natural Gas ◽  
Petroleum Industry ◽  
Accumulation Process ◽  
Interface Tension ◽  
Hydrocarbon Migration ◽  
Rock System ◽  
Capillary Resistance ◽  
Temperature And Pressure

AbstractThe study of natural gas accumulation process in tight formation has become the focus of the petroleum industry. One of the priorities is the effects of interactions in natural gas/water/rock system on hydrocarbon migration and accumulation process. On the macroscopic scale, we investigate the interactions in natural gas/water/rock system by formation fluorescence test and production data analysis. One the microscopic scale, the mechanisms are revealed by mathematical analysis and experimental methods considering the variation of geological temperature and pressure. The effects of interactions in natural gas/water/rock system are also simulated by numerical simulation. The results are visualized and quantified. A novel semi-analytical method based on a physical experiment is proposed to calculate the temperature- and pressure-dependent contact angle and interface tension which reflect the interactions in the natural gas–water–rock system. This semi-analytical is embedded in the numerical simulation during the simulation of the natural gas charging process. The results indicate that with the increase of geological temperature and pressure, the contact angle will increase and the interface tension between natural gas and water will decrease. The capillary resistance in the formation will be reduced. Since the decrease of capillary resistance, the natural gas can be charged into smaller pores, so that the actual charging threshold is lower than the one originally obtained under present reservoir conditions. After considering the temperature and pressure during the accumulation process, some sand bodies that were thought not to be charged may have natural gas accumulate.

Numerical Simulation of Hydrocarbon Migration and Accumulation Process

2014 ◽  
Vol 1073-1076 ◽  
pp. 2331-2334
Author(s):  
Chen Chen Wang ◽  
Jue Ding ◽  
Pei Fen Weng
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Flow Behavior ◽  
Transport Processes ◽  
Gas Migration ◽  
Hydrocarbon Migration ◽  
Two Phase ◽  
Movement Characteristics ◽  
Volume Method ◽  
Oil Gas

Oil-gas migration is an important process of the reservoir formation. Based on this discussion, a numerical simulation was conducted to study on oil-gas migration and aggregation. With considering the flow behavior of gas-liquid two-phase flow, based on Navier-Stocks equations and the Darcy’s law, the movement characteristics of natural gas within the typical fault passage are predicted by using the finite volume method and pressure-velocity coupled algorithm. The velocity distribution of natural gas is discussed under the primary migration condition, as well as the diffusion concentration at different locations. Moreover, the position of spill points affecting natural gas aggregation is analyzed, which provides a theoretical basis for predicting reservoir formation and transport processes.

Measurements of real non-Newtonian response for liquid lubricants under moderate pressures

2001 ◽  
Vol 215 (3) ◽  
pp. 223-233 ◽  
Author(s):  
S Bair
Keyword(s):  
Numerical Simulation ◽  
Kinetic Theory ◽  
Simple Shear ◽  
Pressure Dependence ◽  
Shear Stresses ◽  
Current Interest ◽  
Flow Properties ◽  
Power Law Fluid ◽  
Temperature And Pressure

A thorough characterization of all viscous flow properties relevant to steady simple shear was carried out for five liquid lubricants of current interest to tribology. Shear stresses were generated to values significant to concentrated contact lubrication. Two types of non-Newtonian response were observed: shear-thinning as a power-law fluid and near rate-independence. Functions and parameters were obtained for the temperature and pressure dependence of the viscosity and of the time constant for the Carreau-Yasuda equation. Results are consistent with free volume and kinetic theory, but directly contradict many assumptions currently utilized for numerical simulation and for extracting rheological properties from contact measurements.

scholarly journals 3D pore-type digital rock modeling of natural gas hydrate for permafrost and numerical simulation of electrical properties

2018 ◽  
Vol 15 (1) ◽  
pp. 275-285 ◽  
Author(s):  
Huaimin Dong ◽  
Jianmeng Sun ◽  
Zhenzhou Lin ◽  
Hui Fang ◽  
Yafen Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Electrical Properties ◽  
Natural Gas ◽  
Gas Hydrate ◽  
Natural Gas Hydrate ◽  
Digital Rock

scholarly journals Designing a top cooling system for an electromagnetic calorimeter

2021 ◽  
Vol 345 ◽  
pp. 00015
Author(s):  
Matěj Jeřábek ◽  
Michal Volf ◽  
Daniel Duda
Keyword(s):  
Numerical Simulation ◽  
Pressure Field ◽  
Cooling System ◽  
Flow Simulation ◽  
Electromagnetic Calorimeter ◽  
3D Flow ◽  
Commercial Software ◽  
Pressure Fields ◽  
Detailed Evaluation ◽  
Temperature And Pressure

The article describes a numerical simulation of flow in the cooling system of an electromagnetic calorimeter by analysing the temperature and pressure fields. Two fundamentally different approaches were used to analyse the pressure field - analytical 1D calculation and numerical 3D flow simulation. The article contains a detailed evaluation and description of individual analyses using the commercial software ANSYS 2020 R1.

scholarly journals Numerical Simulation of Turbine Expander in Natural Gas Pressure Energy Power Generation System

2021 ◽  
Vol 2005 (1) ◽  
pp. 012142
Author(s):  
Zhan Zhixing ◽  
Mao Yanqin ◽  
Wang Xiaoyue ◽  
Li Chaojie ◽  
Cai Liang
Keyword(s):  
Numerical Simulation ◽  
Power Generation ◽  
Natural Gas ◽  
Gas Pressure ◽  
Generation System ◽  
Power Generation System
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