fractional flow analysis confirms the advantages of surfactant alternative gas injection (sag) in enhanced oil recovery, but an adsorption phenomenon that has been affected by several factors, weakens the effectiveness of sag injection. in this study, the effects of sacrificial agent, gas phase, and surfactant concentration on adsorption density on silica mineral were investigated by static and...

Gravity drainage is one of the important recovery mechanisms in fractured carbonate and conventional reservoirs. It occurs due to density difference between the gas in fracture and the oil in matrix as well as in conventional tilted reservoirs. Oil phase will form films which are produced under gravity forces (film flow). Many gas injection experiments have been done on laboratory scales with d...

The process of CO2-SAG flooding involves conventional miscible CO2 until breakthrough (BT), followed by a period soaking or shut-in, and then continuation the flooding. SAG provides different improvements in oil recovery for positions each layer multilayer reservoirs, has effects on distribution pore throat blocking adsorption asphaltene to mineral surfaces. In this paper, both experiments have...

Horizontal well fracturing technology is widely used in unconventional reservoirs such as tight or shale oil and gas reservoirs. Meanwhile, the potential of enhanced recovery (EOR) methods including huff-n-puff miscible injection are to further increase The complexities hydraulic fracture properties multiphase flow make it difficult time-consuming understand performance (i.e., production) fract...

For low permeability sandstone reservoirs, CO2 flooding has been proved to be an effective method enhance oil recovery. Reservoir A is a typical conglomerate reservoir in Xinjiang oilfield. The strong water sensitivity, and the injection pressure continues rise. Furthermore well drop. According screening conditions of flooding, can easily achieve miscible with moderate temperature. A...

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 present sought to draw a comparison between model predictive control performance and two other controllers named simple pi and selective pi in controlling large-scale natural gas transport networks. a nonlinear dynamic model of representative gas pipeline was derived from pipeline governing rules and simulated in simulink® environment of matlab®. control schemes were designed to provide a s...

One of the factors which affects the gas lift performance is specific gravity of a lift gas (or the Molecular weight), which can influence the gas solubility in oil and has a direct effect on the gas lift performance. There are some previous researches which have included the lift gas specific gravity in their modeling, but in none of them, a comprehensive research about the effect of lift gas ...