A Study on the Optimization of Surfactants in the Main and Vice Slug in Weak Base ASP Flooding

Huang, Bin; Zhang, Wei; Liu, Huan; Fu, Cheng; Feng, Pengxin; Wang, Ying

doi:10.3390/en10030304

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…Diagram of the experimental process. 1-plunger pump; 2-beaker; 3-container; 4-water; 5-ASP solution; 6-pump sensor; 7-core holder; 8-base; 9-manual pump; 10-oven[14].…”

mentioning

confidence: 99%

A Study on the Matching Relationship of Polymer Molecular Weight and Reservoir Permeability in ASP Flooding for Duanxi Reservoirs in Daqing Oil Field

Huang

Zhang

et al. 2017

Energies

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In order to determine the matching relationship of polymer molecular weight and reservoir permeability in ASP (alkaline/surfactant/polymer) flooding, a number of core flooding experiments with different polymer molecular weights are performed. Two types of curves for the relationship between the pressure difference and the injection pore volume multiples are obtained. One describes the characteristics of the core plugging; the other describes the characteristics of the injection well. The relationship between the polymer molecular cyclotron radius and the pore throat radius used to describe the relationship between the polymer molecular weight and the core permeability. The results indicate that when the ratio of the pore throat radius (r h) to the polymer molecular cyclotron radius (r p) is greater than 7, the injection of ASP system with a variety of molecular weights will not be blocked; on contrary, when the ratio is less than 7, the core will be blocked. The range of water permeability of the core is determined by the value of the polymer molecular weight. The ratio between the pore throat radius (r h) to the polymer molecular cyclotron radius (r p) for the ASP system is greater than that of polymer system (r h /r p = 5). A scanning electron microscope (SEM) is used to compare the morphology of polymer molecules in polymer solution and ASP solution, and shows that the dimension of polymer molecular coils in ASP solution is smaller than that in polymer solution, which is caused by the double effect of alkali and surfactant.

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“…Diagram of the experimental process. 1-plunger pump; 2-beaker; 3-container; 4-water; 5-ASP solution; 6-pump sensor; 7-core holder; 8-base; 9-manual pump; 10-oven[14].…”

mentioning

confidence: 99%

A Study on the Matching Relationship of Polymer Molecular Weight and Reservoir Permeability in ASP Flooding for Duanxi Reservoirs in Daqing Oil Field

Huang

Zhang

et al. 2017

Energies

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“…For instance, Alhaji et al [ 12 ] reported that the immobilized TiO 2 based photocatalytic process was able to efficiently remove more than 90% of COD from TPOME in 5 h of ultraviolet (UV) irradiation. Another study on photo-mineralization of TPOME using TiO 2 based photocatalysis demonstrated 78% COD removal from TPOME in 20 h under UV irradiation [ 21 ]. Nanostructured transition metal compounds, such as TiO 2 , with high surface-to-volume ratios are of particular scientific interest in the field of photocatalysis for environmental remediation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Carbon and Carbon-Nitrogen Doped Black TiO2 Nanomaterials and Their Application in Sonophotocatalytic Remediation of Treated Agro-Industrial Wastewater

et al. 2021

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The conventional open ponding system employed for palm oil mill agro-effluent (POME) treatment fails to lower the levels of organic pollutants to the mandatory standard discharge limits. In this work, carbon doped black TiO2 (CB-TiO2) and carbon-nitrogen co-doped black TiO2 (CNB-TiO2) were synthesized via glycerol assisted sol-gel techniques and employed for the remediation of treated palm oil mill effluent (TPOME). Both the samples were anatase phase, with a crystallite size of 11.09–22.18 nm, lower bandgap of 2.06–2.63 eV, superior visible light absorption ability, and a high surface area of 239.99–347.26 m2/g. The performance of CNB-TiO2 was higher (51.48%) compared to only (45.72%) CB-TiO2. Thus, the CNB-TiO2 is employed in sonophotocatalytic reactions. Sonophotocatalytic process based on CNB-TiO2, assisted by hydrogen peroxide (H2O2), and operated at an ultrasonication (US) frequency of 30 kHz and 40 W power under visible light irradiation proved to be the most efficient for chemical oxygen demand (COD) removal. More than 90% of COD was removed within 60 min of sonophotocatalytic reaction, producing the effluent with the COD concentration well below the stipulated permissible limit of 50 mg/L. The electrical energy required per order of magnitude was estimated to be only 177.59 kWh/m3, indicating extreme viability of the proposed process for the remediation of TPOME.

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“…For highly saline reservoirs, a large number of preflush slugs are required prior to chemical flooding to reduce the loss of chemical agents by highly saline water in the reservoir. Therefore, the use of various types of slugs before main agent injection can provide protection of chemical main agent [10][11][12]. Khan et al carried out the alternate injection scheme of high-viscosity slug and low-viscosity slug [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Optimization of Polymer Preslug Viscosity of ASP Flooding in Interlayer Heterogeneous Well Group Artificial Sandstone Core

Sun

Ke-sen

et al. 2021

Geofluids

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An artificial sandstone core model of large well group of positive rhythmic heterogeneous reservoir was designed and made for the simulation of ASP flooding experiment in the moderate heterogeneous reservoir. The well layout of one injection and one production was employed for the core model, to simulate the influence of polymer preslugs with different viscosity on ASP flooding effect. The experimental results show that the injectability of the polymer preslug and the effect of relieving the conflict of remaining oil production in each layer are related to the viscosity of the system. In the heterogeneous core model with the coefficient of variation of 0.65, under the constraint of the same amount of polymer agent, the ASP flooding effect of the 0.075 PV, 60 mPa·s polymer preslug was better than that of the 0.093 PV, 40 mPa·s and 0.064 PV, 80 mPa·s polymer preslugs. The change in the viscosity of the polymer preslug did not enable the ASP system to effectively exploit the low-permeability layer though. As the viscosity increased, the pressure difference between injection and production increased; the remaining oil could be exploited effectively at the bottom of the high-permeability layer and the medium-permeability layer as well as the injection end of the medium-permeability layer. If the viscosity is too small, the high-permeability area cannot be effectively blocked by the injected chemical agent, and if the viscosity is too large, the injected chemical agent cannot produce good elastic displacement relationship, which will lead to ineffective chemical agent flow. Therefore, the polymer preslug viscosity of the ASP flooding system should be moderate, and cores with different heterogeneity should have a reasonable viscosity matching range.

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A Study on the Optimization of Surfactants in the Main and Vice Slug in Weak Base ASP Flooding

Cited by 6 publications

References 3 publications

A Study on the Matching Relationship of Polymer Molecular Weight and Reservoir Permeability in ASP Flooding for Duanxi Reservoirs in Daqing Oil Field

A Study on the Matching Relationship of Polymer Molecular Weight and Reservoir Permeability in ASP Flooding for Duanxi Reservoirs in Daqing Oil Field

Synthesis and Characterization of Carbon and Carbon-Nitrogen Doped Black TiO2 Nanomaterials and Their Application in Sonophotocatalytic Remediation of Treated Agro-Industrial Wastewater

Experimental Study on Optimization of Polymer Preslug Viscosity of ASP Flooding in Interlayer Heterogeneous Well Group Artificial Sandstone Core

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