ORCID Profile
0000-0002-3088-6952
Current Organisation
University of Adelaide
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Resources Engineering and Extractive Metallurgy | Environmental Engineering Modelling | Petroleum and Reservoir Engineering | Multiphysics flows (incl. multiphase and reacting flows) | Petroleum and reservoir engineering | Environmental Nanotechnology | Resources engineering and extractive metallurgy | Geomechanics and resources geotechnical engineering
Oil and Gas Extraction | Physical and Chemical Conditions of Water in Fresh, Ground and Surface Water Environments (excl. Urban and Industrial Use) | Expanding Knowledge in Engineering |
Publisher: SPE
Date: 26-02-2014
DOI: 10.2118/168203-MS
Abstract: Water channeling through high permeable layers during water flooding results in poor sweep efficiency. There are high costs involved in chemical methods of controlling mobility. Many laboratory studies evidence that injection of water with low salt concentration leads to significant decrease in the core permeability. In this paper the possibility of applying induced fines migration as an enhance oil recovery technique was investigated by modeling of the process. It was shown that the system of equations for water injection with induced formation damage is equivalent to polymer-flooding. It enabled applying polymer option of Eclipse black-oil simulator to model low salinity water flooding with induced formation damage. Investigation of the effect of induced formation damage on sweep efficiency during high salinity and low salinity water flood were the main aims of this study. Eclipse polymer flood model was used to model water injection with induced formation damage in a two layer cake reservoir. Analysis of modeling results showed that induced formation damage was favorable to sweep efficiency. Displacement of oil with low salinity water with induced formation damage resulted in up to 19% extra oil recovery. The sensitivity study showed that improved sweep during low salinity water injection was sensitive to heterogeneity, permeability reduction value, and slug volume. Introducing the permeability dependency of formation damage coefficient reduces IOR effects of induced formation damage during low salinity water flooding if compared with the case of constant formation damage coefficient. Several water flood scenarios with injecting different volume of low salinity water were modeled in order to determine the optimum low salinity slug volume. It was shown that injection of 0.5 PVI of fresh water with high salinity water drive results in similar incremental recovery if compared with continuous injection of low salinity water.
Publisher: Elsevier BV
Date: 09-2013
Publisher: SPE
Date: 07-02-2018
DOI: 10.2118/189485-MS
Abstract: We derive a general system of equations accounting for two-phase fines migration with fines mobilization by injected water with different salinity, rock plugging by the migrating fines and consequent permeability damage in the swept reservoir zones. The analytical model derived contains explicit formulae for water-saturation and ion-concentration fronts along with pressure drop and water-cut in production wells. The model developed is applied to the cases of heavy oils, in low consolidated rocks with different clay composition and different injected and formation water compositions. We show that non-equilibrium effects of the delayed fines release highly affect incremental oil during injection of different-salinity water. The oil-recovery is maximum for fast fines release. For slow fines release, the recovery tends to that of "normal" waterflooding. The fines-migration-assisted smart waterflood is successful in reservoirs with a high content of fines-generating clays in the rocks (kaolinite, illite, and chlorite). A novel analytical model presented in the paper allows predicting reservoir behavior and incremental oil for different compositions of injected water and clay contents in the rock. It permits recommending ionic-composition for the injected water.
Publisher: SPE
Date: 14-06-2011
DOI: 10.2118/143744-MS
Abstract: Permeability decline during corefloods with high rates has been widely reported in the literature. It has often been explained by the lifting, migration and subsequent plugging of pores by fine particles, which has been observed in numerous core flood tests. The phenomena have been connected to well productivity impairment during fines production that also has been widely observed in oilfields. The present paper derives formula for skin factor based on the modified particle detachment model with maximum retention function. The fines migration induced skin is shown to increase with increase of rate and initial attached fines concentration.
Publisher: SPE
Date: 25-10-2016
DOI: 10.2118/182386-MS
Abstract: A common problem in water flooding projects in heterogeneous reservoirs is early water production through high permeable zones. Polymer gel treatment has been used widely for water shut-off and well water-oil ration WOR reduction. However, a large injection volume is required for gel treatments that imposes high operational, material and environmental costs. This study introduces an alternative technique for water shut-off using Low-Salinity water injection. Injection of a small slug of Low-Salinity water induces permeability damage that blocks the water influx from high permeable water producing layers. The simulation study shows that the water shut-off treatment using Low-Salinity water, results in a significant reduction of produced WOR and may improve the final recovery. Injection of 10% PV of Low-Salinity water into the production well, resulted in ~20% reduction in produced WOR and ~6% incremental recovery.
Publisher: SPE
Date: 05-06-2013
DOI: 10.2118/165190-MS
Abstract: Several different physics mechanisms yield in enhanced oil recovery with low salinity water flooding: reduction in interfacial tension, alteration of wettability, mobilization and size exclusion of fines. In this paper the laboratory study of fines migration and straining during low salinity waterflooding is performed. First, single-phase flood with piece-wise salinity decreasing was carried out to assure the presence of movable fines in the rocks under investigation. The, sequential waterflooding by formation water, restoration of the connate water with oil and waterflooding by fresh water, were undertaken. The laboratory tests have been performed under the conditions of large scale approximation, so Welge-JBN methods for determining relative phase permeability were applicable. The relative permeability curves were obtained from the coreflood data. The obtained curves show that the permeability for water increases at low water saturations while it decreases at high saturations. The non-monotonic behavior of relative permeability for water is the main finding of this paper.
Publisher: SPE
Date: 07-06-2011
DOI: 10.2118/144208-MS
Abstract: Well index decline has been widely observed for oil, gas and artesian wells producing the reservoir fines. It has often been explained by the lifting, migration and subsequent plugging of pores by fine particles, which have been observed in numerous core flood tests. In this work, the basic equations for the detachment of fine particles, their migration and size exclusion, causing the rock permeability decline, have been derived. The analytical model, developed for the regime of steady state production with gradual accumulation of strained particles, show the linear skin factor growth vs time and vs the amount of produced reservoir fines.
Publisher: Elsevier BV
Date: 10-2021
Publisher: SPE
Date: 23-10-2018
DOI: 10.2118/191922-MS
Abstract: Existence of clay particles in reservoir rock plays a major role in both oil recovery and formation damage. Clay mobilisation and consecutive formation damage have been observed during injection of low-salinity water in oil fields and laboratory coreflood experiments. Hence, this research aimed at understanding and quantifying the effect of clay type, clay content and composition of injected brine on clay mobilisation. In order to study the effect of clay content, several unconsolidated cores using kaolinite and sand are prepared. The clay content of each s le is controlled by mixing an accurately measured mass of kaolinite with sand. A new procedure is developed to assure: a uniform distribution of kaolinite along the core length, reproducible preparation of sand-clay mixture, identical compaction of the mixture in all experiments using axial and overburden stresses, and reproducible permeability data. Each core is initially saturated with high salinity brine (equivalent to sea water salinity) by creating a constant flow rate of 0.6 M solution through the core. The experiments continue with stepwise reduction of salinity of the injected solution (6 steps down to DI water). Around 150 PV of solutions is injected at each step until permeability stabilization. This indicates that no more kaolinite particles are mobilised. Differential pressure across the core is measured continuously and particle concentration and the conductivity of the effluent s les are also measured The kaolinite concentration, solution salinity and valency of ionic species (salt type) are found to be the controlling factors for clay mobilisation. The following correlations are established: relationships between initial kaolinite concentration and initial core permeability, initial kaolinite concentration and degree of permeability damage, and salt type and permeability damage due to salinity reduction. Experimental data show that a core with lower kaolinite content has higher undamaged/initial permeability. It is also observed that the lower is kaolinite content the higher is permeability damage during injection of low salinity water. Significant permeability decline during low-salinity corefloods is due to mobilization of the kaolinite particles and their capture in pore throats. The results also show that injection of solution containing alent ions (Ca) stabilises the kaolinite particles and prevents their migration during low salinity brine injection.This study is novel in several aspects including: developing a new methodology for unconsolidated core preparation with desired clay content, studying the effect of clay content on initial permeability and severity of formation damage and studying the effect of alent ions on clay behaviour during low salinity brine injection. The results of this study could be used to engineer the composition of injected water to minimise formation damage based on rock clay content.
Publisher: Springer Science and Business Media LLC
Date: 14-09-2011
Publisher: SPE
Date: 23-10-2018
DOI: 10.2118/192070-MS
Abstract: This study presents a novel mechanism of enhancing oil recovery by fines migration during low salinity waterflooding. Formation damage is isolated from other low salinity mechanisms in the experimental tests performed in this work. Therefore, the reduction in residual oil saturation is attributed to fines migration mechanism only that is caused by improved microscale sweep efficiency via water flux ersion due to fine particles straining. Corefloods were performed on Berea cores with high clay content, Bentheimer cores with low clay content, and artificial clean sand cores with no clay to investigate the effect of clay presence on residual oil saturation. HSW and LSW took place after drainage displacements that resulted in the same initial conditions of connate water saturation and oil relative permeability. Non-polar oil is used to ensure water-wetness in the cores and to avoid possible wettability alteration by low salinity waterflooding. Single phase corefloods were also performed to study the effect of piecewise decreasing salinity on permeability. The results show a permeability decline with low salinity water injection in the single phase tests of clay-rich cores accompanied by fine particles production and pH increase. The same effect is observed in the two phase tests. In addition, incremental oil production is observed along with the permeability decrease and fines production. This is due to detachment of clay particles by weakened attraction as a result of LSW, which leads to fines migration and straining in water filled pores. Therefore, water flux ersion into trapped oil pores takes place, which displaces the residual oil in these pores. A relationship between formation damage, βΔσ, and residual oil saturation has been introduced and it can be applied in reservoir simulation for LSW.
Publisher: Elsevier BV
Date: 07-2016
Publisher: SPE
Date: 26-10-2015
DOI: 10.2118/176721-MS
Abstract: Low salinity waterflooding is presently one of the most promising EOR methods. Wettability alteration and residual oil decrease are the most important EOR mechanisms of low salinity waterflooding. However, the mobility control EOR due to fines migration, induced by low salinity water, and the consequent flux ersion is also an important feature of the smart waterflooding. We analyze the limited available field data from 10 years of low salinity water injection in Bastrykskoye field (Russia) and 24 years of production from Zichebashskoe field (Russia) which includes 7 years of low salinity water injection. The mathematical model for fines-assisted waterflooding is used for history matching resulting in good agreement between the field and modelling data. The model is used to compare recovery factor for two scenarios of low salinity water injection and formation (normal) water injection. Low incremental recovery and low decrease in the amount of produced water during the development of both fields is explained by the production of significant amount of the reservoir water before the commencement of low salinity water injection and also the injectors placing.
Publisher: Informa UK Limited
Date: 23-01-2018
Publisher: SPE
Date: 20-10-2015
DOI: 10.2118/176147-MS
Abstract: A new generation Wireline Formation Tester (WFT) was used to perform fluid s ling in a subject field as part of an appraisal drilling c aign targeting significant undeveloped conventional oil reserves. The field consists of free gas caps with associated saturated oil intervals that appear as thin rims around anticlinal flanks. Resistivity log analysis predicated a mud filtrate invasion volume of 89L. Approximately 150% of the expected invasion volume (128L) was pumped during s ling. Laboratory results showed that the s led fluid was still mud filtrate, despite pumping an extra 50% of the estimated volume required for hydrocarbon breakthrough. This paper presents a mathematical model for predicting filtrate invasion and post drilling WFT cleanup performance. A new methodology is developed to incorporate critical shear stress concepts into mud filter-cake thickness and filtrate invasion calculations. The mathematical model is used to provide input data for Eclipse reservoir simulator (E100) and an analysis of the field case. The model can also be applied as a predictive tool for filter-cake development, filtrate invasion and pump-out volumes required during fluid s ling. In addition, the model can be used to design optimal mud properties that minimize filtrate invasion and extra treatment of the invaded zone post-drilling. The mathematical model is integrated with reservoir simulation to model the cleanup process. The mathematical model developed in this study predicted an invasion volume of 528L, which is significantly greater than what was estimated based on resistivity logs (89L). This implies that filtrate invasion volume in the field case was underestimated. A sensitivity study showed that filter-cake permeability was the greatest determinant of filtrate invasion volume, and that radius of filtrate invasion was the greatest control on mud filtrate cleanup during s ling. Reservoir simulation provided a good match between model simulation results and field data.
Publisher: Society of Petroleum Engineers (SPE)
Date: 13-09-2011
DOI: 10.2118/140141-PA
Abstract: Permeability decline during corefloods with varying water composition, especially with low-salinity water, has been observed in numerous laboratory studies. It has often been explained by the lifting, migration, and subsequent plugging of pores by fine particles, which have been observed in numerous coreflood tests with altered water composition. In this paper, we investigated the concept that this permeability decline may be used for mobility control during waterflooding. The Dietz model for waterflooding in a layer-cake reservoir with a given injection and production rate was combined with a particle-detachment model to provide a simple analytical model for the process. The application of the model to an ex le data set showed that the induced fines migration may improve sweep efficiency.
Publisher: AIP Publishing
Date: 2014
DOI: 10.1063/1.4861096
Abstract: A detailed uncertainty analysis associated with carboxyl-modified latex particle capture in glass bead-formed porous media enabled verification of the two theoretical stochastic models for prediction of particle retention due to size exclusion. At the beginning of this analysis it is established that size exclusion is a dominant particle capture mechanism in the present study: calculated significant repulsive Derjaguin-Landau-Verwey-Overbeek potential between latex particles and glass beads is an indication of their mutual repulsion, thus, fulfilling the necessary condition for size exclusion. Applying linear uncertainty propagation method in the form of truncated Taylor's series expansion, combined standard uncertainties (CSUs) in normalised suspended particle concentrations are calculated using CSUs in experimentally determined parameters such as: an inlet volumetric flowrate of suspension, particle number in suspensions, particle concentrations in inlet and outlet streams, particle and pore throat size distributions. Weathering of glass beads in high alkaline solutions does not appreciably change particle size distribution, and, therefore, is not considered as an additional contributor to the weighted mean particle radius and corresponded weighted mean standard deviation. Weighted mean particle radius and LogNormal mean pore throat radius are characterised by the highest CSUs among all experimental parameters translating to high CSU in the jamming ratio factor (dimensionless particle size). Normalised suspended particle concentrations calculated via two theoretical models are characterised by higher CSUs than those for experimental data. The model accounting the fraction of inaccessible flow as a function of latex particle radius excellently predicts normalised suspended particle concentrations for the whole range of jamming ratios. The presented uncertainty analysis can be also used for comparison of intra- and inter-laboratory particle size exclusion data.
Publisher: Elsevier BV
Date: 2022
Publisher: SPE
Date: 23-05-2011
DOI: 10.2118/140953-MS
Abstract: Decline of permeability during corefloods with low salinity and high pH water, has been widely reported in the literature. It has been explained by the lifting, migration and subsequent plugging of pores by fine particles, which has been observed in numerous core flood tests with altered water composition. This effect can be considered to provide a relatively simple method for mobility control during waterflooding. In previous research, the Dietz model for waterflooding in a layer-cake reservoir was combined with a particle detachment model to investigate the effect of fines migration and induced permeability decline on reservoir sweep efficiency and amount of injected water the model was derived under the assumption of constant formation damage coefficient. In this work, the model was extended to the case where the formation damage, caused by captured fines, depends on absolute permeability of the rock. The modeling showed that the incremental recovery and reduced water cut, caused by induced fines migration, is lower for the case of formation damage coefficient decreasing with permeability increase, than for the case of constant formation damage coefficient.
Publisher: Elsevier BV
Date: 06-2012
Publisher: Elsevier BV
Date: 05-2023
Publisher: SPE
Date: 15-02-2012
DOI: 10.2118/151611-MS
Abstract: The core permeability decline during corefloods with varying water composition, especially with low salinity water, has been widely reported in the literature. It has often been explained by the lifting, migration and subsequent plugging of pore throats by fine particles, which has been observed in numerous coreflood tests with altered water composition. In this work, the concept of using this permeability decline in order to decrease water production during pressuredepletion in gas field is investigated. The small volume injection of fresh water into an abandoned watered-up well in order to slow down the encroaching aquifer water is discussed. Equations for two-phase immiscible compressible flow with fines migration and capture have been derived. In large scale approximation, the equations are transformed to the black-oil polymer flooding model. The performed reservoir simulation shows that injection of fresh water bank significantly decreases water production and improves gas recovery.
Publisher: Springer Science and Business Media LLC
Date: 31-05-2021
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier
Date: 2018
Publisher: SPE
Date: 25-09-2011
DOI: 10.2118/139239-MS
Abstract: Permeability decline during corefloods with varying water composition, especially with low salinity water, has been widely reported in the literature. It has often been explained by the lifting, migration and subsequent plugging of pores by fine particles, which has been observed in numerous core flood tests with altered water composition. This effect can be considered to provide a relatively simple method for mobility control during waterflooding. In previous research, the Dietz model for waterflooding in a layer-cake reservoir with a constant injection and production rate was combined with a particle detachment model to investigate the effect of fines migration and induced permeability decline on reservoir sweep efficiency. In this work, the analytical model was extended to waterflooding with a given pressure drop between injection and production wells. The modelling showed that permeability decline in the water swept zone, caused by the alteration of the injected water composition and induced fines migration, may be able to improve waterflood performance by delaying water breakthrough and reducing the water cut at producing wells.
Publisher: SPE
Date: 07-02-2018
DOI: 10.2118/189533-MS
Abstract: The main objective of this work is to characterize the formation damage induced by fines migration in reservoir rocks with different kaolinite contents. The problem is particularly important for water production during oil and gas well operations, and for injectivity and sweep during low-salinity waterflooding. We perform laboratory corefloods using aqueous solutions with different salinities in engineered rocks with different kaolinite content, yielding fines migration and permeability alteration. A novel methodology of preparing artificial sand-packs with a given kaolinite fraction has been established. Sequential injections of aqueous solutions in order of decreasing salinity were performed in five sand-packs with different kaolinite fractions varying from 1 to 10 weight percentage. Severe permeability decline was observed when deionized water was injected into the cores. A new analytical model that captures the effects of fines release with delay and their re-entrapment by the rock has been developed. The new model allows for explicit expressions for the attached, suspended, and strained particle concentrations, as well as the pressure drop across the core. The analytical model shows good agreement with the laboratory-observed phenomena across a wide range of kaolinite concentrations. The model constants are presented for each of the five cores and lie within typically reported values. The laboratory protocol and mathematical model allows for reliable prediction of fines-migration related formation-damage during waterflood, EOR, and commingled production of low-salinity water with oil or gas.
Publisher: SPE
Date: 26-02-2014
DOI: 10.2118/168144-MS
Abstract: The external filter cake build-up with its final stabilization has been widely reported for waterflooding in oilfields, drilling, produced water re-injection and disposal of produced water in aquifers. The brief overview of the models for cake formation and stabilization is presented. We derive the mechanical equilibrium equation for stabilized cake accounting for electrostatic force and for varying permeate force factor. The main empirical parameter of the model, highly affecting the stabilized cake prediction is the lever arm ratio for the particle on the cake surface. The lever arm ratio was calculated from laboratory cross-flow filtration experiments and from well injectivity data. It was also determined from Hertz's theory for the elastic particle deformation on the solid cake surface. Good agreement between the results validates the developed mechanical equilibrium model with the lever arm ratio determined from the elastic particle deformation theory.
Publisher: SPE
Date: 14-06-2011
DOI: 10.2118/143742-MS
Abstract: Permeability decline during corefloods with varying water composition, especially with low salinity water, has been widely reported in the literature. It has often been explained by the lifting, migration and subsequent plugging of pores by fine particles, which has been observed in numerous core flood tests with altered water composition. In the present paper, we derive a new system of governing equations describing fines mobilisation, migration and subsequent permeability decline for 1-phase and 2-phase flows. In large scale approximation, the mathematical model for 2-phase flow with induced fines migration is equivalent to polymer flooding model. It allows taking advantage of the polymer flooding option for the Eclipse black oil simulator in order to model waterflood with low salinity water, where the induced fines migration and permeability damage can be considered to provide a relatively simple method for mobility control during waterflooding. The modelling showed that permeability decline in the water swept zone, caused by the alteration of the injected water composition and induced fines migration, may be able to improve waterflood performance by delaying water breakthrough and reducing the water cut.
Publisher: American Chemical Society (ACS)
Date: 27-09-2018
Publisher: SPE
Date: 24-02-2016
DOI: 10.2118/179028-MS
Abstract: A common problem in aquifer water-drive reservoirs and water flooding projects is premature and excessive water production through natural fractures, faults or high permeable thief zones. The most common water shut-off methods today is polymer gel treatment however, a large treatment volume is required to block the water influx that generally involves high operational, material and environmental costs. It is well known that injection of low salinity water into a reservoir that contains movable clays can significantly decrease the rock permeability. This paper presents a new technique of applying induced formation damage for water shut-off in order to block the water influx from high permeable water producing layers. This study applies numerical simulation to investigate the effectiveness of the induced formation damage treatment for reducing water production. The results of the study show that injection of an small slug (~1% PVI) of low salinity water into the water producing well resulted in ~30% reduction in produced water cut and ~6% incremental recovery.
Publisher: Elsevier BV
Date: 10-2022
Publisher: SPE
Date: 14-10-2014
DOI: 10.2118/171498-MS
Abstract: Oil bypassing is a significant problem in edge-water drive reservoirs. The encroaching water from an active aquifer overruns oil and leaves a significant volume of trapped residual oil behind. This causes pre-mature water production and early well abandonment. The technique to inject small volume of low salinity water into abandoned wells in order to create a low permeable barrier against the water fingers is presented. In addition a method of applying commercial reservoir simulators to model the process is introduced. The modeling results shows that injection of small volume of low salinity water results in increasing reservoir production life and consequently 4.5% incremental recovery if compared to normal depletion. The economic evaluation of the technique resulted in NPV value of +7.84 MM US$ meaning that the technique is viable from economic stand point.
Publisher: Society of Petroleum Engineers (SPE)
Date: 23-05-2013
DOI: 10.2118/144009-PA
Publisher: Elsevier BV
Date: 07-2021
Publisher: SPE
Date: 03-06-2015
DOI: 10.2118/174229-MS
Abstract: Excessive water production is one of the major factors in wells’ productivity reduction. It can be resulted from water coning and water channeling from water table to the wells through natural fractures, faults or high permeability zones. The use of foams or gels for controlling water production has been tested successfully in several field cases. However A large treatment volume is required to block the water influx that generally involves high operational and material costs. It is well know that injection of low salinity water into reservoir can mobilize reservoir fines and significantly decrease reservoir permeability. This paper presents the possibility of applying induced formation damage in order to block the water influx without hindering the oil production. This is a new cost-effective method using injection of low salinity water slug. It is shown that system of equations for water injection with induced fines migration and polymer injection is mathematically equivalent. Hence the polymer option in Eclipse-100 is applied to model low salinity water injection with induced fines migration. The modeling results showed that injection of 0.004 PVI of low salinity water above WOC resulted in significant reduction in produced water and improvement of oil recovery with no adverse effect on the oil production.
Publisher: Elsevier BV
Date: 2021
Publisher: American Chemical Society (ACS)
Date: 28-10-2019
Publisher: Elsevier BV
Date: 09-2018
Publisher: Springer Science and Business Media LLC
Date: 16-11-2020
Publisher: Elsevier BV
Date: 09-2011
Publisher: AIP Publishing
Date: 09-2012
DOI: 10.1063/1.4749844
Abstract: Using the law of propagation of uncertainties we show how equipment- and measurement-related uncertainties contribute to the overall combined standard uncertainties (CSU) in filter permeability and in modelling the results for polystyrene latex microspheres filtration through a borosilicate glass filter at various injection velocities. Standard uncertainties in dynamic viscosity and volumetric flowrate of microspheres suspension have the greatest influence on the overall CSU in filter permeability which excellently agrees with results obtained from Monte Carlo simulations. Two model parameters “maximum critical retention concentration” and “minimum injection velocity” and their uncertainties were calculated by fitting two quadratic mathematical models to the experimental data using a weighted least squares approximation. Uncertainty in the internal cake porosity has the highest impact on modelling uncertainties in critical retention concentration. The model with the internal cake porosity reproduces experimental “critical retention concentration vs velocity”-data better than the second model which contains the total electrostatic force whose value and uncertainty have not been reliably calculated due to the lack of experimental dielectric data.
Publisher: Elsevier BV
Date: 06-2019
Publisher: SPE
Date: 11-04-2011
DOI: 10.2118/140141-MS
Abstract: Permeability decline during corefloods with varying water composition, especially with low salinity water, has been observed in numerous laboratory studies. It has often been explained by the lifting, migration and subsequent plugging of pores by fine particles, which have been observed in numerous core flood tests with altered water composition. In this work, the concept that this permeability decline may be used for mobility control during waterflooding was investigated. The Dietz model for waterflooding in a layer cake reservoir with a constant injection and production rate was combined with a particle detachment model to provide a simple analytical model for the process. The application of the model to an ex le data set showed induced fines migration may improve sweep efficiency for a given volume of injected water.
Publisher: Elsevier BV
Date: 06-2015
Publisher: Elsevier BV
Date: 09-2013
Publisher: American Chemical Society (ACS)
Date: 19-07-2018
Publisher: SPE
Date: 15-02-2012
DOI: 10.2118/151774-MS
Abstract: Well productivity decline have been widely observed for gas wells producing the reservoir fines. The phenomenon has been explained by the lifting, migration and subsequent plugging of the pores by the fine particles, finally resulting in permeability decrease. It has been observed in numerous core flood tests and field cases. The new basic equations for the detachment of fine particles, their migration and size exclusion, causing the rock permeability decline during gas production, have been derived. The analytical model, developed for the regime of steady state gas production with a gradual accumulation of strained particles, exhibits the linear skin factor growth vs the amount of produced reservoir fines. The modeling results are in a good agreement with the well production history. The model predicts well productivity decline due to fines production based on the short term production data.
Publisher: Elsevier BV
Date: 02-2018
Publisher: SPE
Date: 20-10-2015
DOI: 10.2118/176128-MS
Abstract: During the last two decades, low salinity waterflooding as a part of more general varying water composition has become a promising EOR method. Nevertheless, the physics mechanisms of extra oil recovery by low salinity waterflood are not clearly understood. Yet, fines migration and consequent permeability reduction may occur as a result of reduction of water salinity that can ert the water flux. This effect must be accounted in low salinity waterflood modelling. Moreover, the flux ersion due to induced-fines migration could be utilized to improve the reservoir sweep. In the current study the Tempest software is applied to build a model and history match 25 years of low salinity water injection in Bastrykskoye field (Russia). The model is then used to compare recovery factor for two scenarios of low salinity water (LSW) injection and formation water (FW) injection. The modeling results show an insignificant change in recovery factor between two scenarios of LSW and FW injection. This low incremental recovery is explained by the production of a significant amount of the reservoir water (FW) before the commencement of low salinity water injection. A sensitivity study shows that the location of the injectors can highly affect the incremental recovery obtained by LSW injection. A 2-layer model with 5-spot pattern shows a significant incremental recovery (8%) during injection of LSW as compared to the injection of formation water (FW).
Publisher: Elsevier BV
Date: 09-2017
Publisher: Elsevier BV
Date: 11-2021
Publisher: American Chemical Society (ACS)
Date: 23-09-2014
DOI: 10.1021/IE502312C
Publisher: Elsevier BV
Date: 04-2019
Publisher: Informa UK Limited
Date: 13-06-2012
Publisher: Begell House
Date: 2012
Publisher: SPE
Date: 26-10-2015
DOI: 10.2118/176548-MS
Abstract: Since 2nd World War, waterflooding remains a major method of oil production in Russia. Improved waterflooding with low capital investments and high incremental recovery would highly impact the country's economy. The paper proposes several methods of produced water deceleration by induced migration and straining of the natural reservoir fines, yielding the produced water decrease and sweep efficiency enhancement. It includes low-salinity/smart waterflooding with fines mobilization and permeability reduction in swept zones, yielding the sweep efficiency enhancement. Other methods are based on short-term injection of small banks of fresh or low salinity water in order to block the produced water by creation of the low-permeability shields due to migration of mobilized fines. The validity of the results is defined by micro-scale and core-scale modelling, laboratory studies, upscaling of results up to the reservoir scale and by the field data.
Publisher: Informa UK Limited
Date: 04-03-2015
Start Date: 02-2016
End Date: 06-2019
Amount: $323,779.00
Funder: Australian Research Council
View Funded ActivityStart Date: 02-2020
End Date: 02-2023
Amount: $523,756.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2023
End Date: 12-2023
Amount: $1,929,000.00
Funder: Australian Research Council
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