Gas injection into heavy oil reservoirs could result in high ultimate recovery of oil. Experimental studies showed that an application of a combined technology of Gas Assisted Gravity Drainage (GAGD) and Vapor Extraction (VAPEX) could increase final oil recovery of a candidate viscous oil reservoir. In this paper the results of laboratory investigation are presented, including Pressure-Volu...

The characteristic scale of pore flow in tight reservoirs is generally the range 0.1 μm to 1 μm, which shows obvious micro- and nanoscale effect. traditional oil gas seepage theory cannot accurately describe law liquid nanopores. determination characteristics crucial development, layout, prediction oil. Therefore, a non-Newtonian fluid model established discuss confined heterogeneous pores micr...

Long-period long-duration (LPLD) seismic events that have been observed during hydraulic stimulation of shalegas and tight-gas reservoirs appear to represent slow shear slip on relatively large faults. Within the limitations of the recording geometry, we determine the areas in the reservoirs where the events are located in two case studies in the Barnett shale. In one data set, LPLD events appe...

gas injection into heavy oil reservoirs could result in high ultimate recovery of oil. experimental studies showed that an application of a combined technology of gas assisted gravity drainage (gagd) and vapor extraction (vapex) could increase final oil recovery of a candidate viscous oil reservoir. in this paper the results of laboratory investigation are presented, including pressure-volume-t...

hydropower reservoirs Georgia Papacharalampous*, Hristos Tyralis, and Demetris Koutsoyiannis Department of Water Resources and Environmental Engineering, School of Civil Engineering, National Technical University of Athens, Iroon Polytechniou 5, 157 80 Zografou, Greece * Corresponding author, [email protected] Abstract: Multi-step ahead streamflow forecasting is of practical i...

The natural gas reserves and recovery rate of tight sandstone reservoirs in the Sulige field Ordos Basin play a crucial role China’s industry. This study aims to enhance stable production time by summarizing geological characteristics field, discussing challenges development providing recommendations for reservoirs. results show that matrix reservoir properties, effective sand body size, gas-be...

Microcracks are the main seepage channels and reservoir space for oil gas in dense sandstone reservoirs, degree of development dominates reservoir’s high stable production capacity. A new method has been devised to address lack quantitative identification characterization methods microcrack networks. The is based on core stress sensitivity, permeability anisotropy, two-phase rule testing. By im...

The porous media in tight reservoirs are mainly composed of micro- and nanopores, gas seepage through which is complex, making it difficult to study. Physical simulation using micron tubes an intuitive effective method study the mechanism gas. lattice Boltzmann (LBM) most for simulation, has been widely used. Microscale experiments LBM simulations with different inner diameters were performed. ...

Abstract As the associated gas of tight reservoirs, natural is abundant and noncorrosive, which more suitable for development oil reservoirs in China. However, mechanism injection unclear, channeling serious after fracturing. The water-alternating-gas (WAG) flooding an effective means to delay improve recovery. Therefore, it significant clarify preventing recovering by water-alternation-natural...