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Chemical treatment for sand production control:A review of materials,methods,and field operations

Petroleum Science 2023年第3期20卷 1640-1658页

作者： Ali Safaei Mohammad Asefi Mohsen Ahmadi Tayebe Pourshamsi Shima Baloochestanzadeh Ali Khalilnezhad masoud riazi Enhanced Oil Recovery(EOR)Research Centre IOR/EOR Research InstituteShiraz UniversityShirazIran Iran Food and Drug Administration(IFDA) Gerash University of Medical SciencesGerashIran Faculty of Petroleum and Natural Gas Engineering Sahand University of TechnologyTabrizIran

Sand production from loosely consolidated reservoirs is one of the critical issues in the oil and gas in-dustry all around the world that can cause many problems,such as erosion of surface and well equip-ment,sand accumulation in wells and operation facilities,buckling of casing in cased-hole wells and well productivity *** production control methods include restrictive production rate,mechanical methods(slotted liner,wire-wrapped screen,pre-packed screen,frac-pack,gravel pack,high-rate water pack)and chemical consolidation that chemical method is considered for more effectiveness in sand production alleviation due to increasing formation strength in near wellbore *** review provides an overview on the laboratory and filed operation investigations of chemical remedy for sand *** used chemical agents and more common laboratory tests for evaluating the chemical performance in sand consolidation are introduced in this ***,the results of field operations and in-jections of chemicals into the desired formation are also *** results show that the chemical sand consolidation is more effective in newly perforated wells which have no sand production experi-ence and have a production history of less than two ***,it was concluded that the main challenges in applying this method are permeability and capillary force reduction around the wellbore and selective injection into the targeted formation layers.

关键词： Sand production Loosely consolidated reservoirs Formation strength Chemical remedy Permeabilityreduction

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Prediction of oil recovery in naturally fractured reservoirs subjected to reinfiltration during gravity drainage using a new scaling equation

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Petroleum Exploration and Development 2020年第6期47卷 1307-1315页

作者： AGHABARARI Amirhossein GHAEDI Mojtaba riazi masoud Department of Petroleum Engineering School of Chemical and Petroleum EngineeringP.O.Box ***Shiraz UniversityShirazIran Reservoir Modeling and Simulation Center(RMSC) P.O.Box ***Shiraz UniversityShirazIran

By comparing numerical simulation results of single-porosity and dual-porosity models,the significant effect of reinfiltration to naturally fractured reservoirs was confirmed.A new governing equation was proposed for oil drainage in a matrix block under the reinfiltration *** inspectional analysis,a dimensionless equation suitable for scaling of recovery curves for matrix blocks under reinfiltration has been *** the design of experiments,test cases with different rock and fluid properties were defined to confirm the scope of the presented *** defined cases were simulated using a realistic numerical simulation *** method can estimate the oil amount getting into the matrix block through reinfiltration,help simulate the oil drainage process in naturally fractured reservoirs accurately,and predict the recovery rate of matrix block in the early to middle periods of *** the defined scaling equation in the dual-porosity model can improve the accuracy of the predicted recovery rate.

关键词： naturally fractured reservoir gravity drainage reinfiltration scaling equation dual-porosity simulation inspectional analysis

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Activating solution gas drive as an extra oil production mechanism after carbonated water injection

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2938-2945页

作者： Mahmood Shakiba Shahab Ayatollahi masoud riazi Enhanced Oil Recovery(EOR)Research Centre IOR/EOR Research InstituteShiraz UniversityShirazIran Department of Petroleum Engineering Amirkabir University of TechnologyTehranIran School of Chemical and Petroleum Engineering Sharif University of TechnologyTehranIran

Enhanced oil recovery(EOR)methods are mostly based on different phenomena taking place at the interfaces between fluid–fluid and rock–fluid *** the last decade,carbonated water injection(CWI)has been considered as one of the multi-objective EOR techniques to store CO2 in the hydrocarbon bearing formations as well as improving oil recovery *** CWI process,as the reservoir pressure declines,the dissolved CO2 in the oil phase evolves and gas nucleation phenomenon would *** a result,it can lead to oil saturation restoration and subsequently,oil displacement due to the hysteresis *** this condition,CO2 would act as insitu dissolved gas into the oil phase,and play the role of an artificial solution gas drive(SGD).In this study,the effect of SGD as an extra oil recovery mechanism after secondary and tertiary CWI(SCWI-TCWI)modes has been experimentally investigated in carbonate rocks using coreflood *** depressurization tests resulted in more than 25%and 18%of original oil in place(OOIP)because of the SGD after SCWI and TCWI tests,*** the ultimate enhanced oil recovery point of view,the efficiency of SGD was observed to be more than one-third of that of CWI ***,the pressure drop data revealed that the system pressure depends more on the oil production pattern than water production.

关键词： Solution gas drive Gas nucleation Carbonated water Enhanced oil recovery CO2 capture

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Impact of pertinent parameters on foam behavior in the entrance region of porous media:mathematical modeling

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Petroleum Science 2020年第6期17卷 1669-1682页

作者： Fereshteh Samimi Zahra Sakhaei masoud riazi Department of Chemical Engineering School of Chemical and Petroleum EngineeringShiraz UniversityShirazIran Enhanced Oil Recovery(EOR)Research Centre IOR/EOR Research InstituteShiraz UniversityShirazIran Petroleum Engineering Department School of Chemical and Petroleum EngineeringShiraz UniversityShirazIran

Foam injection is a promising solution for control of mobility in oil and gas field exploration and development,including enhanced oil recovery,matrix-acidization treatments,contaminated-aquifer remediation and gas leakage *** study presents a numerical investigation of foam behavior in a porous *** flow method is applied to describe steady-state foam displacement in the entrance *** this model,foam flow for the cases of excluding and including capillary pressure and for two types of gas,nitrogen(N2)and carbon dioxide(CO2)are *** of pertinent parameters are also *** indicate that the foam texture strongly governs foam flow in porous *** entrance region may be quite different for foam texture to accede local equilibrium,depending on the case and physical properties that are *** to the fact that the aim of foaming of injected gas is to reduce gas mobility,results show that CO2 is a more proper injecting gas than *** are also some ideas presented here on improvement in foam displacement *** study will provide an insight into future laboratory research and development of full-field foam flow in a porous medium.

关键词： Foam displacement Entrance region Fractional flow method Foam texture Water saturation Mathematical modeling

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Viscous fingering and its effect on areal sweep efficiency during waterflooding: an experimental study

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Petroleum Science 2019年第1期16卷 105-116页

作者： Zahra Kargozarfard masoud riazi Shahab Ayatollahi Enhanced Oil Recovery (EOR) Research Centre IOR-EOR Research Institute Shiraz University Department of Petroleum Engineering School of Chemical and Petroleum Engineering Shiraz University Enhanced Oil Recovery (EOR) Research Center School of Chemical and Petroleum Engineering Sharif University of Technology

Viscous fingering is one of the main challenges that could reduce areal sweep efficiency during waterflooding in oil reservoirs. A series of waterflooding experiments were carried out in a Hele-Shaw cell at ambient temperature during which areal sweep efficiency was estimated and techniques to ease the fingering problem were examined. The onset and propagation of viscous fingers were monitored as a function of both injection rate and injection/production positions. Image processing techniques were utilized to quantitatively investigate the propagation of fingers. The experimental results show that, under specific conditions, increasing the number of finger branches could improve the areal sweep efficiency, whereas growth of a single narrow finger has a negative impact on oil displacement efficiency. According to the obtained results,increasing the injection rate improves the areal sweep efficiency up to a critical rate at which viscous fingers start to *** impact of heterogeneity of the medium on distributing the viscous fingers was also investigated by introducing two different arrangements of fractures in the model. The results show that fractures perpendicular to the direction of flow would distribute the displacing water more uniformly, while fractures in the direction of flow would amplify the unfavorable sweep efficiency.

关键词： Viscous fingering Areal sweep efficiency Front instability Mobility ratio Fractures Hele-Shaw cell

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Enhancing the spontaneous imbibition rate of water in oil-wet dolomite rocks through boosting a wettability alteration process using carbonated smart brines

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Petroleum Science 2019年第6期16卷 1361-1373页

作者： Ehsan Ghandi Rafat Parsaei masoud riazi Enhanced Oil Recovery(EOR)Research Centre IOR/EOR Research InstituteSchool of Chemical and Petroleum EngineeringShiraz UniversityShirazIran Department of Petroleum Engineering School of Chemical and Petroleum EngineeringShiraz UniversityShirazIran

Most fractured carbonate oil reservoirs have oil-wet ***,the process of imbibing water from the fractures into the matrix is usually poor or basically does not exist due to negative capillary *** achieve appropriate ultimate oil recovery in these reservoirs,a water-based enhanced oil recovery method must be capable of altering the wettability of matrix *** studies showed that carbonated water can alter wettability of carbonate oil-wet rocks toward less oil-wet or neutral wettability conditions,but the degree of modification is not high enough to allow water to imbibe spontaneously into the matrix blocks at an effective *** this study,we manipulated carbonated brine chemistry to enhance its wettability alteration features and hence to improve water imbibition rate and ultimate oil recovery upon spontaneous imbibition in dolomite ***,the contact angle and interfacial tension(IFT)of brine/crude oil systems were measured for several synthetic brine samples with different ***,two solutions with a significant difference in WAI(wettability alteration index)but approximately equal brine/oil IFT were chosen for spontaneous imbibition *** the next step,spontaneous imbibition experiments at ambient and high pressures were conducted to evaluate the ability of carbonated smart water in enhancing the spontaneous imbibition rate and ultimate oil recovery in dolomite *** results showed that an appropriate adjustment of the imbibition brine(i.e.,carbonated smart water)chemistry improves imbibition rate of carbonated water in oil-wet dolomite rocks as well as the ultimate oil recovery.

关键词： Spontaneous imbibition Carbonated smart water Wettability alteration Enhanced oil recovery Dolomite rocks

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Review on application of nanoparticles for EOR purposes: A critical review of the opportunities and challenges

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Chinese Journal of Chemical Engineering 2019年第2期27卷 237-246页

作者： Yousef Kazemzadeh Sanaz Shojaei masoud riazi Mohammad Sharifi Department of Petroleum Engineering Amirkabir University of Technology Tehran Polytechnic Enhanced Oil Recovery (EOR) Research Centre IOR/EOR Research Institute Shiraz University Petroleum Engineering Department School of Chemical and Petroleum Eng. Shiraz University

Nanoparticles have already gained attentions for their countless potential applications in enhanced oil ***-sized particles would help to recover trapped oil by several mechanisms including interfacial tension reduction, impulsive emulsion formation and wettability alteration of porous media. The presence of dispersed nanoparticles in injected fluids would enhance the recovery process through their movement towards oil–water interface. This would cause the interfacial tension to be reduced. In this research, the effects of different types of nanoparticles and different nanoparticle concentrations on EOR processes were investigated. Different flooding experiments were investigated to reveal enhancing oil recovery mechanisms. The results showed that nanoparticles have the ability to reduce the IFT as well as contact angle, making the solid surface to more water wet. As nanoparticle concentration increases more trapped oil was produced mainly due to wettability alteration to water wet and IFT reduction. However, pore blockage was also observed due to adsorption of nanoparticles, a phenomenon which caused the injection pressure to increase. Nonetheless, such higher injection pressure could displace some trapped oil in the small pore channels out of the model. The investigated results gave a clear indication that the EOR potential of nanoparticle fluid is significant.

关键词： Enhance oil recovery Nanofluid injection Nanoparticle Interfacial tension Wettability alteration Pore blockage

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The impact of connate water saturation and salinity on oil recovery and CO2 storage capacity during carbonated water injection in carbonate rock

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Chinese Journal of Chemical Engineering 2019年第7期27卷 1699-1707页

作者： Mahmood Shakiba masoud riazi Shahab Ayatollahi Mostafa Takband Department of Petroleum Engineering Amirkabir University of TechnologyTehranIran Enhanced Oil Recovery (EOR) Research Centre IOR/EOR Research InstituteShiraz UniversityShirazIran Petroleum Engineering Department School of Chemical and Petroleum Eng.Shiraz UniversityShirazIran School of Chemical and Petroleum Engineering Sharif University of TechnologyTehranIran

Carbonated water injection(CWI)is known as an efficient technique for both CO2 storage and enhanced oil recovery(EOR).During CWI process,CO2 moves from the water phase into the oil phase and results in oil *** mechanism is considered as a reason for *** fingering leading to early breakthrough and leaving a large proportion of reservoir un-swept is known as an unfavorable phenomenon during flooding ***,instability at the interface due to disturbances in porous medium promotes viscous fingering *** water makes viscous fingers longer and more irregular consisting of large number of tributaries leading to the ultimate oil recovery ***,higher in-situ water content can worsen this ***,this water can play as a barrier between oil and gas phases and adversely affect the gas diffusion,which results in EOR *** the other hand,from gas storage point of view,it should be noted that CO2 solubility is not the same in the water and oil *** this study for a specified water salinity,the effects of different connate water saturations(Swc)on the ultimate oil recovery and CO2 storage capacity during secondary CWI are being presented using carbonate rock samples from one of Iranian carbonate oil *** results showed higher oil recovery and CO2 storage in the case of lower connate water saturation,as 14%reduction of Swc resulted in 20%and 16%higher oil recovery and CO2 storage capacity,respectively.

关键词： Carbonated water Connate water Carbonate reservoir Enhanced oil recovery Secondary recovery CO2 storage

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Impact of solutal Marangoni convection on oil recovery during chemical flooding

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Petroleum Science 2020年第5期17卷 1298-1317页

作者： Sepideh Palizdan Jassem Abbasi masoud riazi Mohammad Reza Malayeri School of Chemical and Petroleum Engineering Shiraz UniversityMolasadra Avenue71946-84636 ShirazFarsIran

In this study,the impacts of solutal Marangoni phenomenon on multiphase flow in static and micromodel geometries have experimentally been studied and the interactions between oil droplet and two different alkaline solutions(***04 and Na_2 CO_3) were *** static tests revealed that the Marangoni convection exists in the presence of the alkaline and oil which should carefully be considered in porous *** the micromodel experiments,observations showed that in the MgS04 flooding,the fluids stayed almost stationary,while in the Na2 C03 flooding,a spontaneous movement was *** changes in the distribution of fluids showed that the circular movement of fluids due to the Marangoni effects can be effective in draining of the unswept *** dimensional analysis for possible mechanisms showed that the viscous,gravity and diffusion forces were negligible and the other mechanisms such as capillary and Marangoni effects should be considered in the investigated *** value of the new defined Marangoni/capillary dimensionless number for the Na2 C03 solution was orders of magnitude larger than the MgS04 flooding scenario which explains the differences between the two cases and also between different micromodel *** conclusion,the Marangoni convection is activated by creating an ultra-low IFT condition in multiphase flow problems that can be profoundly effective in increasing the phase mixing and microscopic efficiency.

关键词： Marangoni effects Chemical flooding Surface tension Alkaline

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Experimental and theoretical investigation of CO_(2) mass transfer enhancement of silica nanoparticles in water

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Petroleum Research 2018年第4期3卷 370-380页

作者： Soosan Farzani Tolesorkhi Feridun Esmaeilzadeh masoud riazi School of Chemical and Petroleum Engineering Shiraz UniversityShiraz***Iran Department of Chemical and Petroleum Engineering School of Chemical and Petroleum EngineeringEnhanced Oil and Gas Recovery InstituteAdvanced Research Group for Gas Condensate RecoveryShiraz UniversityShiraz***Iran

Nanofluids have novel characteristics that make them potentially useful for different *** modest mass transfer enhancement in conventional nanofluids,in this study,mass-transfer of carbon dioxide in pure water and water-based nanofluids dispersed with silica nanoparticles at different initial pressures up to 15 MPa and at temperatures of 35℃ and 45℃ was *** water and two nanofluids at different concentrations with volume of 150 cm^(3) were used for this ***_(2) was brought in contact with each solution in a pressure-volume-temperature(PVT)cell with no ***,carbon dioxide diffusion coefficients at different pressures were estimated based on Fick's *** obtained results demonstrated that water/silica nanofluid with 0.5 wt%and 0.1 wt%increased the carbon dioxide diffusion coefficient up to 39.2%and 11.9%compared to that in pure distilled water,***,it was observed that the measured diffusion coefficient of carbon dioxide inwater increased with temperature rise from 35℃ to 45℃ at constant ***,it could be seen that,the diffusion coefficient decreased with pressure at constant *** was concluded that among the enhancement mechanisms of nanoparticles,(*** effect and Brownian motion),Brownian motion would play the main role in mass transfer enhancement.

关键词： Nanofluid Mass transfer enhancement Carbon dioxide Diffusion coefficient Brownian motion

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