... are another substitute to fracture water-sensitive reservoirs at which damage to pore throats is caused by swelling clays or fines migration. The mixture of CO 2 and surfactant as a CO 2 -foam not only reduces formation damage by minimizing the quantity of aqueous fluid which enters the formation...

... Abstract Carbon dioxide injection and its performance during sequestration activities rely on the ability of the injection well to inject the desired amount of CO 2 for decades. However, the CO 2 -rock-water interaction may cause immense formation damage by plugging the pores and reducing...

... mechanisms during different processes of production is vital in optimizing production and injection processes in order to minimize the formation damage. In this study, asphaltene deposition during natural depletion and miscible CO 2 injection was conducted through core flooding tests at reservoir...

... asphaltene deposition during primary depletion and CO 2 injection. The main purpose of this study is to investigate and to compare asphaltene deposition mechanisms due to primary depletion and CO 2 injection. The solid model as thermodynamic model was applied to investigate asphaltene precipitation...

.... acidizing concentration acid concentration acid injection fluid dynamics pressure drop formation damage flow in porous media hcl spe 143449 experiment upstream oil & gas acid system co 2 wormhole hcl concentration calcium pressure buildup surfactant permeability injection rate...

... Solubility trapping and residual gas trapping react contradictorily. Simulation results of Sifuentes et al., (2009) suggest that CO 2 exhibits higher mobility at lower values of residual gas saturations. Higher mobility results in larger volume of brine being encountered by CO 2 which...

...) using carbon dioxide slug size of 15 % hydrocarbon pore volume (HCPV). Three other runs using different initial oil saturations were also performed to study the effect of mobile oil saturation. Our results suggest that application of CO 2 flooding to these reservoirs could exacerbate damage...

... study of the behaviorof CO 2 and N 2 foams in granular porous media using X-ray Computed Tomography is reported. In the experiments gas is forced through natural porous media initially saturated with a surfactant solution, a process known as SurfactantAlternatingGas (SAG). The CO 2 was either under...

... Abstract The solid-free viscoelastic surfactant (VES) fluid has good proppant transport and excellent cleanup capabilities. Coupling the benefits of a VES fluid with a carbon dioxide (CO 2 )-emulsified system will further enhance cleanup in a depleted reservoir, extend the application to water...

... inhibition drillstem/well testing water sample log analysis enhanced recovery petroleum engineer drilling operation production monitoring society reservoir surveillance sensor completion installation and operations production control co 2 oil ga application programme Introduction...

... caco 3 relation production enhancement enhanced recovery hcl-carbonate reaction hydraulic fracturing well intervention co 2 formic acid hco 3 dissociation reaction Introduction In most carbonate stimulation treatments, above and below fracturing pressure, hydrochloric acid (HCl...

.... The pH was monitored with a Beckman 34 pH meter. CO 2 saturation was accomplished using a sparger tube connected to a CO 2 cylinder. Standard lab-quality nitrogen and a sparger tube were used for N 2 saturation during the titration procedure. During the citric acid + CO 2 saturation titration...

... migration. In addition, there was concern that filter cake from the synthetic drill-in fluid could still be in place and would provide some restriction to optimum production rate. A HF sandstone acidizing treatment incorporating a CO 2 preflush process for matrix oil well stimulation was recommended...

... carbonate reservoir fredd diffusion coefficient ph 12 dissolution hedta upstream oil & gas ph 4 acid produce superior spe 68924 enhanced recovery hydroxyaminocarboxylic acid produce superior formulation reaction rate chang spe 68924 acidizing co 2 Introduction...

... processing in the annulus of wells should be next developed as a relevant technology. gradient thermogelf project insulation reservoir surveillance depletion inflow performance production monitoring reservoir depletion production control production logging co 2 well performance conductivity...