Effect of Alkaline Preflush in an Alkaline-Surfactant-Polymer Flood

Panthi, Krishna Kanta; Mohanty, Kishore K.

doi:10.1021/ef301847z

Cited by 31 publications

(19 citation statements)

References 17 publications

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“…Before surfactant flooding, apreflush is injected to precondition the reservoirs. This preflush contains sacrificial agents such as Sodium Tripolyphoshate (Enordet, 2013).The alkaline preflush increases the core salinity to the optimum salinity of the surfactant formulation before the surfactant slug (Krishna et al, 2013).Fresh water can also be injected to change salinity and hardness of the formation brine. This helps to reduce the adsorption of surfactant to rock surfaces.…”

Section: Surfactant Floodingmentioning

confidence: 99%

“…It enhances the volumetric sweep efficiency which causes more oil to be displaced to the surface. Polymer injection does not reduce the residual oil saturation but enables us to reach it more quickly and economically by reducing water production (Krishna et al, 2013). They are known as mobility controller for Enhanced Oil Recovery.…”

Section: Polymer Floodingmentioning

confidence: 99%

“…ASP flooding has been successfully tested and applied in some reservoir with good performance in China, including Daqing sandstone reservoirs, Xingjiang conglomerate reservoirs and shengli complex fault block reservoirs (Youyi et al,2013). In Daqing oil, the alkali (Na2CO3) percentage used was between 0.75-1.6% by weight and surfactant between 0.5-3.5% by weight in order to reduce IFT between water and Daqing oil (Krishna et al,2013).…”

Section: Alkaline-surfactant-polymer Floodingmentioning

confidence: 99%

“…Similarly, some of these could be applied at higher temperatures than polyacrylamides. They are regarded as "green" chemicals that help reduce the overall environmental foot-print of EOR operations (Krishna et al, 2013). Considering the use of these plant waste will reduce cost of production, maximize profit, convert waste to wealth and create job opportunities.…”

Section: Alkaline-surfactant-polymer Floodingmentioning

confidence: 99%

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Formulation of Local Alkaline- Surfactant-Polymer (Asp) For Enhanced Oil Recovery in Niger Delta: A Review

2015

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The Niger Delta basin has being producingfor over 50years using primary recovery method. It is gradually advancing into secondary oil recovery stage after which the tertiary oil recovery techniques will be exploited. The primary and secondary recovery methods are only able to recover about 30 -35% of oil from the reservoir leaving the 65-70% trapped. As the demand for energy and the cost of drilling increases globally, there arises the need to squeeze the bottom of the barrel. Chemical processes is one of the tertiary recovery techniques which involves the use of chemicals (Alkaline, Surfactant, and Polymer) for enhance oil recovery but these synthesized chemicals are imported and expensive. Several researchers have shown that Alkaline-Surfactant-Polymer (ASP) blends have high potentials to enhance oil recovery through a combination of the positive effects of these three types of Enhanced Oil Recovery (EOR) agents. Research had also shown that local materials in our environment can enhance oil recovery. This review paper outlines local materials that have being in use in the formulation of ASP for EOR. Challenges involved in using these local materials are also outlined. One of such challenges is that most of thesematerials are also used as food. The use of agro-wastesfrom plants that have similar characteristics as the consumable local materials for the formulation of local ASP is proposed. These agro-wastes provide salinity tolerance and are stable at high temperature when compared with synthesized chemicals. Their utilization will minimize production cost as their cost will be theoretically independent of oil price, maximize profit, convert waste to wealth and create job opportunities for Nigerians.Abbas Roustaei, SadeghSafferzadeh, MiladMohammadi (2013): An evaluation of modified silica nanoparticles efficiency in enhancing oil recovery of light and intermediate oil reservoirs.

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Section: Surfactant Floodingmentioning

confidence: 99%

Section: Polymer Floodingmentioning

confidence: 99%

Section: Alkaline-surfactant-polymer Floodingmentioning

confidence: 99%

Section: Alkaline-surfactant-polymer Floodingmentioning

confidence: 99%

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Formulation of Local Alkaline- Surfactant-Polymer (Asp) For Enhanced Oil Recovery in Niger Delta: A Review

2015

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“…[19][20][21] Similarly, the diffusion of chromium ions in the gelant is also greatly affected by the polymer. Bryant et al 22 held that chromium loss was more critical in matrix formations than in fractured reservoirs because of the high surface area of rock in contact with the gelant.…”

Section: Introductionmentioning

confidence: 99%

Effect of a polymer on chromium(III) diffusion during gelant injection in fractured media

Bai

Xiong

et al. 2016

J of Applied Polymer Sci

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The effect of a polymer on chromium diffusion during gelant injection into fractured media was explored with a polymer/chromium(III) (Cr 31 ) gelant. The capture and barrier effects are two main affecting mechanisms of polymer molecules on the diffusion of Cr 31 , and the formation of the polymer leak-off layer is a key influencing factor. The experimental results show that when the polymer molecular weight (MW) or concentration increased, both the diffusion rate of Cr 31 and the leak-off degree of the gelant decreased sharply. This resulted in the delayed initial production and advanced final production of Cr 31. Because of the changing diffusion rate of Cr 31 and the dilution effect of brine during gelant injection, the change trends of the Cr 31 production from the fracture outlet and matrix ports reversed after the injection volume exceeded a value; this value was named the critical injected volume. During gelant injection into the fractures, under the effects of gravity action and the disproportionate diffusion of Cr 31, the chromium diffusion profiles measured at the fracture top and bottom were different. The chromium diffusion profile along the matrix varied with increasing gelant injected volume, but it finally reached the diffusion equilibrium state in the matrix. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43447.

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Performance of alkali‐free natural petroleum sulfonates: Ultra‐low interfacial tension on oil/water interface

et al. 2015

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Ultra‐low interfacial tension (IFT) is one of the most important conditions relating to surfactant flooding for enhanced oil recovery. In this paper, the dynamic interfacial tension (DIT) of an alkali‐free petroleum sulfonate surfactant was studied with the spinning drop method aimed at the Daqing oil/water system. The effects of various experimental conditions, such as surfactant concentration, inorganic salt concentration, polar organic compounds, oil‐soluble sulfonates, and time stability were investigated. It was shown that the aqueous phase has little effect on DIT. The high molecular weight petroleum sulfonates play an important role in the lowering of oil/water IFT. The non‐uniform changes of the oil droplets in DIT measurements were also discussed from the aspects of petroleum sulfonate composition and diffusion rate. The increase of aqueous phase viscosity could only ease the rebound phenomenon, while the increase of heavy components of petroleum sulfonates could both eliminate the non‐uniform changes of the oil droplets and reduce the values of the IFT. These results may be helpful in explaining the reasons behind producing ultra‐low interfacial tension and the preparation of formulations for practical applications.

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Effect of Alkaline Preflush in an Alkaline-Surfactant-Polymer Flood

Cited by 31 publications

References 17 publications

Formulation of Local Alkaline- Surfactant-Polymer (Asp) For Enhanced Oil Recovery in Niger Delta: A Review

Formulation of Local Alkaline- Surfactant-Polymer (Asp) For Enhanced Oil Recovery in Niger Delta: A Review

Effect of a polymer on chromium(III) diffusion during gelant injection in fractured media

Performance of alkali‐free natural petroleum sulfonates: Ultra‐low interfacial tension on oil/water interface

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