... ) for the subsequent 2D models, 1D numerical slim-tube simulations (near miscible and immiscible) were performed to track the interfacial tension between oil and gas (σ go ) during the whole injection process. Both IFT-dependent models were applied to investigate the effects of different relative-permeability...

... media displacement experiment gravity effect relative permeability injection composition different miscibility condition miscible method breakthrough immiscible displacement co-optimization function storage efficiency Oil Recovery near-miscible displacement Introduction Increasing...

... injection and high remaining oil to gas is evident. Note that immiscible gas displacing oil experiments may suffer from experimental artifacts such as capillary end effect and viscous fingering. Gas has low viscosity and, therefore, high mobility which leads to unfavorable mobility ratio during gas...

... that these experiments may exhibit some features that we may not see for vaporizing gas drive displacements. We make the following conclusions: In the high-IFT immiscible compositional displacements, the effects of the location of high-permeability layer and injection rate on the recovery are moderate. Slightly...

... a single relative permeability curve during the process from immiscible to miscible conditions will result in inaccurate gas mobility against water, which may lead to poor estimation of sweep efficiency and oil recovery. A synthetic sector compositional model was built to evaluate the effects...

... enhanced recovery breakthrough chemical flooding methods Fluid Dynamics Upstream Oil & Gas heterogeneity displacement experiment injection recovery permeability ratio permeability heterogeneity co 2 composite sample flow in porous media immiscible co 2 layered sample...

... vertical cross-section displacements with different injection and initial fluids. The fluids chosen represent immiscible, near miscible and first-contact miscible systems. The effluents were collected for each experiment and their compositions were measured using gas chromatography. Several snapshots...

... , C1-7 and C8+) is presented. The compositional path for both oil and gas were investigated for a representative cell (15m from the injector), at both immiscible and near-miscible conditions. The cell selection was designed to experience the full composition path during 1PV injection...

... are continuously monitored and the produced gas composition is continuously analyzed by gas chromatography. At the end, the injection rate is increased to minimize capillary end-effects. In-situ saturation monitoring is not performed during the experiment and therefore the shape of relative permeability curves...

... formulation. However, this method may not fully capture the change in fluid behavior as the pressure depletes and cumulative gas injection into the reservoir is increased. This study focuses on the gas phase behavior and gas miscible displacement process through a full-field compositional simulation model...

... and permeability reduction during CO 2 injection in core samples. For this purpose, the pressures along the core were measured at 4 different points to study the damage distribution. Damage index were measured in different sections and compared during miscible and immiscible flooding and the effect of residual...

... to determine the minimum miscibility pressure (MMP) of N 2 to ensure that the effect of both miscible and immiscible gas injection was achievable. Second, filtration experiments were conducted using a specially designed filtration apparatus to investigate the effect of nano pore sizes on asphaltene deposition...

... conditions. Although, Wang et al. utilized different operating conditions for both findings, using 8.2 MPa and 27°C for the miscible conditions and 6.3 MPa and 27°C for the immiscible conditions (Wang, Gu, & Research, 2011). During gas injection, the selected gas type can be nitrogen (N2), carbon dioxide...

... not been reported so far. In first ever attempt, the mechanistic benefits of production strategy on gravity drainage oil recovery are identified in this paper. Effects of irregular and regular well patterns and vertical and horizontal gas injection wells are investigated using a fully compositional 3D...

... (Nondispersive infrared) sensor was employed to analyse the composition of the produced gas. Figure 8 compares oil recovery (IOIP%) during the miscible, horizontal and vertical immiscible secondary gas injection experiments, performed at reservoir conditions. At 0.42 PV of gas injection, a drop in oil...

... Abstract The aim of this research is to analyze how the novel formation of the new gas phase caused by the injection of carbonated water affects differential pressure behavior and, at the same time, to compare carbonated water and immiscible CO 2 injection results under the same experimental...

... into effect, which indicates good prospects. Keywords Low permeability reservoirs, CO2 flooding, miscible volumetric coefficient, compositional sweep efficiency 1 Introduction Generally, the CO2 flooding processes can be divided into two categories, miscible flooding and immiscible flooding. The minimum...

... effective because of their pure composition of injected gas (100%). In contrast, the injection results in the Ikiztepe field are the worst because this field has the highest oil viscosity which makes the oil hard to move. Incremental Oil Recovery From all CO 2 immiscible flooding projects, the CO 2...

... concerns an experimental study to investigate whether gravity drainage is also an effective recovery process in fractured reservoirs. In this study, we describe six gas injection experiments conducted at different miscibility conditions, i.e., immiscible, developed miscible and first contact miscible (FCM...

... size, diffusion has no effects on condensate recovery and matrix condensate saturation in miscible gas injection. (c) Immiscible gas injection scenario Based on the previous analyses on MMPs, C 1 , N 2 and stock-tank gas are immiscible with deposited condensate during natural depletion scenario...