Oil Displacement Experiments in Heterogeneous Cores: Analysis of Recovery Mechanisms

1987 ◽  
Author(s):  
K.S. Sorbie ◽  
R.M.S. Wat ◽  
T.C. Rowe
Keyword(s):  
Oil Displacement ◽  
Displacement Experiments ◽  
Recovery Mechanisms ◽  
Heterogeneous Cores

Fluorescent polyacrylamide nanospheres for concentration detection and fluorescent visual oil displacement experiments

2021 ◽  
pp. 51898
Author(s):  
Yipeng Chen ◽  
Zhongli Tang ◽  
Shuo Wang ◽  
Yuxing Liu ◽  
Jin Qu ◽  
...  
Keyword(s):  
Oil Displacement ◽  
Displacement Experiments

scholarly journals Effect of Surface Wettability on Immiscible Displacement in a Microfluidic Porous Media

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 664 ◽  
Author(s):  
Jorge Avendaño ◽  
Nicolle Lima ◽  
Antonio Quevedo ◽  
Marcio Carvalho
Keyword(s):  
Porous Media ◽  
Water Injection ◽  
Residual Oil ◽  
Strong Function ◽  
Fluid Displacement ◽  
Oil Displacement ◽  
Displacement Front ◽  
Final Volume ◽  
Displacement Experiments ◽  
Effect Of Surface

Wettability has a dramatic impact on fluid displacement in porous media. The pore level physics of one liquid being displaced by another is a strong function of the wetting characteristics of the channel walls. However, the quantification of the effect is still not clear. Conflicting data have shown that in some oil displacement experiments in rocks, the volume of trapped oil falls as the porous media becomes less water-wet, while in some microfluidic experiments the volume of residual oil is higher in oil-wet media. The reasons for this discrepancy are not fully understood. In this study, we analyzed oil displacement by water injection in two microfluidic porous media with different wettability characteristics that had capillaries with constrictions. The resulting oil ganglia size distribution at the end of water injection was quantified by image processing. The results show that in the oil-wet porous media, the displacement front was more uniform and the final volume of remaining oil was smaller, with a much smaller number of large oil ganglia and a larger number of small oil ganglia, when compared to the water-wet media.

The Effect of Following Water after Polymer Flooding on the Displacement Efficiency with Alternately Injecting Slug of Gel and Polymer/Surfactant

2013 ◽  
Vol 734-737 ◽  
pp. 1290-1293 ◽  
Author(s):  
Ji Hong Zhang ◽  
Yu Wang ◽  
Xi Ling Chen ◽  
Zi Wei Qu ◽  
Dong Ke Qin
Keyword(s):  
Polymer Flooding ◽  
Experimental Results ◽  
Compound System ◽  
Residual Oil ◽  
Displacement Efficiency ◽  
Flat Panel ◽  
Oil Displacement ◽  
Panel Model ◽  
Displacement Experiments ◽  
Polymer Surfactant

Aiming at the development of remaining oil after polymer flooding, the author develops an oil displacement technology, alternately injecting the slug of the gel and polymer/surfactant compound system, which can advanced improve the remained oil after polymer flooding. By using the artificial large flat-panel model, the oil displacement experiments are carried on to study the injection characteristics and the displacement efficiency of the alternately injecting the slug of gel and polymer/surfactant compound system, and whether the following water should be injected after polymer flooding has been discussed. The experimental results show that, the recovery of alternately injecting the gel and polymer/surfactant slug after polymer flooding could enhance recovery more than 10% on the basis of polymer flooding, the following water after polymer flooding has a little impact on the final recovery but increasing time and the difficulty of development. Therefore, these results provide the technology that alternately injecting the slug of the gel and polymer/surfactant could advance develop the residual oil and enhance the recovery after polymer flooding.

Research on Characteristics of Combination Flooding System and Oil Displacement Efficiency

2011 ◽  
Vol 391-392 ◽  
pp. 1047-1050 ◽  
Author(s):  
Yan Chang Su ◽  
Wen Xiang Wu
Keyword(s):  
Binary System ◽  
Interfacial Tension ◽  
Physical Simulation ◽  
Displacement Efficiency ◽  
Weak Base ◽  
Simulation Experiments ◽  
Oil Displacement ◽  
Oil Displacement Efficiency ◽  
Heterogeneous Cores

By physical simulation experiments, the features of alkali-free binary flooding system (polymer and a new surfactant BS) were contrasted with weak base ternary flooding system and alkali ternary flooding system. The experiment results showed that interfacial tension of BS binary system is the lowest. In the absence of alkali, the viscosity and elasticity of binary system were higher than those of other two ternary flooding systems. By physical simulation experiments with artificial heterogeneous cores, the recovery of BS binary flooding system was 2 percent higher than that of weak base ternary flooding system, and 1.4 percent higher than that of alkali ternary flooding system.

The Slug Design of Multi-Slug and Equi-Fluidity Oil Displacement with Binary Flooding

2015 ◽  
Vol 733 ◽  
pp. 144-147 ◽  
Author(s):  
Jiang Min Zhao ◽  
Tian Ge Li
Keyword(s):  
Synergistic Effect ◽  
Oil Recovery ◽  
Laboratory Experiments ◽  
Theoretical Calculations ◽  
Water Flooding ◽  
Oil Displacement ◽  
Remaining Oil ◽  
Heterogeneous Cores

This paper optimizes the design of the nature of each slug and the combination of slugs through theoretical calculations and laboratory experiments, which is the key to tremendously enhance the oil recovery with the oil-displacing method of multiple multi-slug combinations. When oil-displacing experiments with multiple multi-slug combinations are conducted on heterogeneous cores in the laboratory, it is necessary that each injected slug be designed rationally in their viscosity, volume, etc., with the view to guarantee the synchronous equi-fluidity mobility of each slug after water flooding. With the synergistic effect of a variety of oil-displacing agents, the remaining oil in each permeability layer can be dug, driven by overall piston.

Research and Application of Deep Profile Control & Oil Displacement by Polymer Gel - Surfactant in High Salinity Oilfield

2013 ◽  
Vol 318 ◽  
pp. 491-495
Author(s):  
Yue Luo ◽  
Ding Wang ◽  
Lei Bai ◽  
Ke Jian Zha
Keyword(s):  
High Salinity ◽  
Liquid Water Content ◽  
Polymer Gel ◽  
Oil Displacement ◽  
Profile Control ◽  
Displacement Experiments ◽  
Injection Water ◽  
Weak Gel ◽  
Surfactant Composition ◽  
Deep Profile

A polymer gel-surfactant composition profile control technology has been developed, basing on the high salinity, especially high levels of Ca2+, Mg2+ in the injection water of the Hongshanzui oilfield. The construction parameters of deep profile control & oil displacement have been studied by performing core displacement experiments. The results show that the ratio of polymer gel slug and active agents slug is 1:0.3, the best ratio of strong polymer gel, medium polymer gel and weak polymer gel slug is 4:3:3. The way of combination is stronger gel slug + surfactant slug + in strong gel slug + weak gel slug + surfactant slug + strong gel sealing slug. The application effect of this technology in Hongshanzui oilfield is remarkable, the 12 tune flooding group daily oil production rose from 85t to 130t and the liquid water content decreased from 75% to 67%.

scholarly journals Nuclear Magnetic Resonance Evaluation Study for Effect of Foam flooding in Heterogeneous Cores

2020 ◽  
Vol 213 ◽  
pp. 01025
Author(s):  
Shuai Hua ◽  
Yuan Li ◽  
Qinfeng Di
Keyword(s):  
Oil Recovery ◽  
Foam Stability ◽  
Dynamic Change ◽  
Water Flooding ◽  
Sweep Efficiency ◽  
Displacement Effect ◽  
Oil Displacement ◽  
Profile Control ◽  
Foam Flooding ◽  
Heterogeneous Cores

Foam flooding demonstrated the ability to solve the viscous fingering problem of gas flooding and increase the sweep efficiency in enhancing oil recovery. It is commonly used in development of heterogeneous reservoirs. While the characteristics of fluid migration in pores and between layers were still unclear. In this paper, Dynamic change of oil and water with different foam quality was tested during foam flooding by NMR method. Oil displacement effect of water flooding and foam flooding was compared. The results showed the foam quality affected the foam stability and profile control effect. Compared with water flooding, the foam could increase the recovery rate of the low-permeability layer, and the foam system with high stability had a high sweep efficiency and a high oil displacement efficiency in the heterogeneous cores.

Foams With Wettability-Altering Capabilities for Oil-Wet Carbonates: A Synergistic Approach

SPE Journal ◽  
2016 ◽  
Vol 21 (04) ◽  
pp. 1126-1139 ◽  
Author(s):  
Robin Singh ◽  
Kishore K. Mohanty
Keyword(s):  
Contact Angle ◽  
Crude Oil ◽  
Anionic Surfactant ◽  
Volume Fraction ◽  
Spontaneous Imbibition ◽  
Wettability Alteration ◽  
Alpha Olefin Sulfonate ◽  
Zwitterionic Surfactant ◽  
Oil Displacement ◽  
Displacement Experiments

Summary The goal of this work is to systematically study the effect of wettability alteration and foaming, either acting individually or synergistically, on tertiary oil recovery in oil-wet carbonate cores. Three types of anionic-surfactant formulations were used: alkyl propoxy sulfate (APS), which exhibited low interfacial tension (IFT), wettability alteration, and weak foaming; alpha-olefin sulfonate (AOS), which showed no wettability alteration but good foaming; and a blend of APS, AOS, and a zwitterionic-foam booster, which showed low IFT, wettability alteration, and good foaming. First, contact-angle experiments were conducted on oil-wet calcite plates to evaluate their wettability-altering capabilities. Second, spontaneous imbibitions in a microchannel were performed to study the role of IFT reduction and wettability alteration by these formulations. Third, static foam tests were conducted to evaluate their foaming performance in bulk. Fourth, foam-flow experiments were conducted in cores to evaluate potential synergism between the anionic-surfactant AOS and the zwitterionic surfactants in stabilizing foam in the absence of crude oil. Finally, oil-displacement experiments were performed by use of a vuggy, oil-wet, dolomite core saturated with a crude oil. After secondary waterfloods, surfactant solutions were coinjected with methane gas at a fixed foam quality (gas-volume fraction). Contact-angle and spontaneous-imbibition experiments showed that AOS can act as a wettability-altering surfactant in the presence of sodium carbonate, but not alone. No synergy was observed in foam stabilization by means of the blend of zwitterionic surfactant and AOS solution (1:1) in a water-wet carbonate core. Oil-displacement experiments in oil-wet carbonate core revealed that coinjection of wettability-altering surfactant and gas can recover a significant amount of oil [33% original oil in place (OOIP)] over waterflood. During foam flooding, with AOS as the foaming agent, only a weak foam was propagated in a carbonate core, irrespective of the core wettability. A blend of wettability-altering surfactant, AOS, and zwitterionic surfactant not only altered the wettability of carbonate core from oil-wet to water-wet, but also significantly increased the foam-pressure gradient in the presence of crude oil.

Relative Permeability from Displacement Experiments in Homogeneous and Heterogeneous Cores

2003 ◽  
Author(s):  
J. Tóth ◽  
T. Bódi ◽  
P. Szücs ◽  
F. Civan
Keyword(s):  
Relative Permeability ◽  
Displacement Experiments ◽  
Heterogeneous Cores

scholarly journals Preparation of Modified Colloidal Gas Aphrons and Analysis of the Oil Displacement Effect

2020 ◽  
Vol 10 (3) ◽  
pp. 927
Author(s):  
Shaohua You ◽  
Xiaofei Sun ◽  
Xiaoyu Li
Keyword(s):  
Oil Recovery ◽  
Sodium Dodecyl ◽  
Displacement Efficiency ◽  
Displacement Effect ◽  
Oil Displacement ◽  
Displacement Experiments ◽  
Oil Displacement Efficiency ◽  
Foam Flooding ◽  
Enhance Oil Recovery ◽  
Colloidal Gas Aphrons

Colloidal gas aphrons (CGAs) offer some advantages in improving oil recovery, but resin and asphaltene deposition problems still occur in CGA flooding. Based on this phenomenon, a new modified colloidal foam system is developed by incorporating a modifier in CGA preparation. The results indicate that the modified CGAs prepared by adding foaming agent sodium dodecyl sulfate (SDS) (concentration: 5 g/L) and GXJ-C (a CGAs modifier from a light fraction of petroleum; concentration: 0.1 g/L) attained the best performance. Oil displacement experiments show that modified CGA flooding had a better effect than water or CGA flooding. There are two important mechanisms via which modified CGAs enhance oil recovery, including decreasing the interfacial tension and enhancing the heavy components in the recovered oil. The developed modified CGA system attained a good oil displacement effect, which is of guiding significance to further improve the oil displacement efficiency and application of foam flooding.

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