...) increase from 2.86 to 3.56. As a result, the traditional CSS method seems to be uneconomic. In view of the problems shown above, CO 2 assisted CSS was tested in this oilfield and has shown great success as follow: The steam injection pressure increased from 5.7 MPa to 6.9 MPa and the SOR decreased from...

... and simulation approaches suffered from significant lacks and drawbacks, which created a clear gap in the performance of the injected gases in the lab scale versus the field scale. This research clearly found that the performance of Natural Gas (NG) injection is significantly better than the performance of CO 2...

... the performance of CO 2 foam and CO 2 PEF during heavy oil recovery from both unconsolidated (i.e. sandpack) and consolidate (rock sample) porous media with the help of fluid flow experiments. The injection pressure profile, oil recovery, and CO 2 gas production were monitored and recorded to analyze...

... Abstract This study, aims to investigate the effect of nanoparticles/polymer on CO 2 -foam stability and foamability of Alpha Olefin Sulfonate, AOS at high temperature and salinity conditions. Moreover, the effect of extra hydrocarbon phase on foam stability at high temperature and salinity...

... Abstract CO 2 injection has been used for several decades as a successful recovery method in enhanced oil recovery. The main impact of CO 2 is on lowering minimum miscibility pressure. However, the unfavorable mobility of CO 2 force us to use CO 2 with other methods such as water...

... Chemistry scale inhibition scale remediation oilfield chemistry final distribution deposition composition flocculation production optimization crude oil asphaltene heavy oil initial distribution co 2 precipitation Asphaltene Precipitation application Asphaltene Flocculation reservoir...

... Reservoir Management production optimization Vittorato waterflooding reservoir pressure co 2 VRR injection Oil Recovery recovery saturation reservoir Introduction Miscibility is defined as the ability of forming a uniform phase from multiple substances. The substances involved...

.... This can be verified through the analysis of the viscous/gravitational force using equation (17), which shows that the value of N G <<1 and hence the gravitational force in the CO 2 injection into heavy oil in a horizontal core would result in severe gravity override. This figure showed a sharp...

... of horizontal wells. enhanced recovery milling cone thermal method Upstream Oil & Gas stimulation Efficiency SAGD tight oil viscosity steam injection CH block cleanup additive application surfactant Drilling co 2 artificial borehole reservoir complex reservoir steam-assisted gravity...

... Abstract Most oil reservoirs in Changqing Oilfield area are low permeability. After several ten years of production, the effect of water flooding becomes worse and worse as the reservoir enters middle development stages. CO 2 flooding is an important method for oil fields in the future...

... co 2 half-life foam stability foam column concentration increase surfactant solution Introduction The BP Statistical Review of World Energy shows that, at the end of 2013, total world proved oil reserves reached 1687.9 billion barrels, 60% of which are trapped in formations after primary...

... Abstract Steam or CO 2 injection methods account for most of the oil recovered worldwide with Enhanced Oil Recovery (EOR) methods. Currently heavy oil production is less than 7% of the world’s oil production; this percentage is not expected to increase dramatically without significant changes...

... Abstract Heat self-generating CO 2 flooding is a new technique combining of steam flooding, gas flooding and so on. Its main mechanism is the application of steam heating self-generating gas agent solution to generate a large volume of gases (including CO 2 , NH 3 , etc) in the formation...

... Abstract In this paper, techniques have been developed to experimentally evaluate performance of CO 2 injection in heavy oil reservoirs for pressure maintenance purpose. More specifically, a three-dimensional (3D) physical model consisting of five vertical wells and three horizontal wells...

... & gas enhance offshore viscosity heavy oil production oil production offshore heavy oil production co 2 production rate injection numerical simulation heavy oil cumulative oil production production performance steam injection cyclic steam stimulation steam stimulation Introduction...

... Abstract In this paper, techniques have been developed to examine the enhanced swelling effect and viscosity reduction of CO 2 -saturated heavy oil with addition of rich solvent C 3 H 8 . Experimentally, PVT tests are conducted to measure the saturation pressure, swelling factor and viscosity...

... Abstract A comprehensive simulation has been conducted to evaluate performance of the conventional SAGD and CO 2 -solvent(s)-assisted SAGD processes in a real field case. Compared to the steam-only process (i.e., the conventional SAGD process), addition of CO 2 , C 3 H 8 and C 4 H 10...