Search results for: Keka Ojha

Items from 1 to 20 out of 32 results

article

Characterization of porous media by chemical tracers using time‐of‐flight and residence time distribution concept

Archana Balikram, Supriya Sinha, N.P. Deva Kumar, Keka Ojha

Asia‐Pacific Journal of Chemical Engineering > 14 > 3 > n/a - n/a

Chemical tracer proves itself an efficient and economic means for in‐depth and accurate reservoir characterization, where other known technology fails. In the present study, a new combination of conservative and partitioning tracer, that is, (VI) and 1‐Hexanol, was evaluated for their applicability in field. Laboratory investigation was carried out to characterize a porous medium in terms of heterogeneity,...

article

Integrated fractal description of nanopore structure and its effect on CH4 adsorption on Jharia coals, India

Paul Naveen, Mohammad Asif, Keka Ojha

Fuel > 2018 > 232 > C > 190-204

Internal pore surface heterogeneity and pore matrix irregularities have a decisive influence on the gas adsorption capacity and transportation in the coalbed methane (CBM) reservoir. This study integrates novel idea of relating the multiple approaches to customize the obtained results from analytical techniques to attain efficient elucidation and quantification of pore features and its influence on...

article

Correction to: Rheological studies and optimization of Herschel-Bulkley flow parameters of viscous karaya polymer suspensions using GA and PSO algorithms

Geetanjali Chauhan, Amit Verma, Akashdeep Das, Keka Ojha

Rheologica Acta > 2018 > 57 > 3 > 287-291

Some major changes that were required in the figures and table were not implemented. The corrections were mentioned when the proofread was submitted. These changes were made to make the manuscript more readable and presentable in black and white print out for the readers.

article

Rheological studies and optimization of Herschel-Bulkley flow parameters of viscous karaya polymer suspensions using GA and PSO algorithms

Geetanjali Chauhan, Amit Verma, Akashdeep Das, Keka Ojha

Rheologica Acta > 2018 > 57 > 3 > 267-285

Rheological characteristics of gum karaya suspensions which is proposed as a fracturing fluid were investigated with the main objective to determine the yield stress and other rheological parameters using various models. The flow hysteresis confirms the thixotropic behavior of fluid with increased structural breakdown at higher concentration and temperature. An empirical model developed for the studied...

article

Synergistic effects of polymer and bentonite clay on rheology and thermal stability of foam fluid developed for hydraulic fracturing

Amit Verma, Geetanjali Chauhan, Keka Ojha

Asia‐Pacific Journal of Chemical Engineering > 12 > 6 > 872 - 883

Demand for foam fracturing fluids is ever‐increasing because of its nondamaging characteristics, less water requirement, combined with efficient proppant carrying capacity. The present study reported the synergistic effects of bentonite clay and polymer (guar) on rheology and stability of the foam prepared with surfactant (sodium dodecyl sulfate). Bentonite clay, which is never considered so far for...

article

Evaluation of Eocene source rock for potential shale oil and gas generation in north Cambay Basin, India

Sumit Kumar, Keka Ojha, Rabi Bastia, Kapil Garg, more

Marine and Petroleum Geology > 2017 > 88 > C > 141-154

Source rock potential of 108 representative samples from 3 m intervals over a 324 m thick shale section of middle Eocene age from the north Cambay Basin, India have been studied. Variation in total organic carbon (TOC) and its relationship with loss on ignition (LOI) have been used for initial screening. Screened samples were subjected to Rock-Eval pyrolysis and organic petrography. A TOC log indicated...

article

Rheological, structural and morphological studies of Gum Tragacanth and its inorganic SiO2 nanocomposite for fracturing fluid application

Geetanjali Chauhan, Amit Verma, Abhinita Hazarika, Keka Ojha

Journal of the Taiwan Institute of Chemical Engineers > 2017 > 80 > C > 978-988

Present study discusses the development of a novel nano-composites using a natural polymer, Gum Tragacanth and inorganic silicon dioxide nanoparticles for its application in hydraulic fracturing. The structural and morphological characteristics of the developed fluids have been investigated using various analytical techniques like FTIR, Cryo-TEM, FE-SEM, AFM which indicated uniform dispersion of nanoparticles...

article

Experimental and modeling hydraulic studies of foam drilling fluid flowing through vertical smooth pipes

Amit Saxena, A.K. Pathak, Keka Ojha, Shivanjali Sharma

Egyptian Journal of Petroleum > 2017 > 26 > 2 > 279-290

Foam has emerged as an efficient drilling fluid for the drilling of low pressure, fractured and matured reservoirs because of its the ability to reduce formation damage, fluid loss, differential sticking etc. However the compressible nature along with its complicated rheology has made its implementation a multifaceted task. Knowledge of the hydrodynamic behavior of drilling fluid within the borehole...

article

Rheological Studies of Gum Tragacanth as a Prospective Candidate for Hydraulic Fracturing

Geetanjali Chauhan, Prathibha Pillai, Keka Ojha

Materials Today: Proceedings > 2017 > 4 > 9 > 9413-9417

Gum tragacanth, an acidic polysaccharide has been proposed as a prospective candidate for fracturing, which has earlier found its application as thickening agent and stabilizer in food and pharmaceutical industry due to its high tolerance to heat, acidity, wider pH and very long shelf life. The rheological study of Gum Tragacanth has been compared to most widely used polymer in oil and gas industry...

article

Studies on kinetics and thermodynamics of Cr(VI) adsorption onto sand to check feasibility of its use as tracer in oilfields

Archana Balikram, Keka Ojha

Asia‐Pacific Journal of Chemical Engineering > 11 > 6 > 1060 - 1068

The present investigation is aimed to evaluate the adsorption kinetics and its thermodynamics of Cr(VI) on sand. Effects of various parameters like pH, adsorbent dosages, adsorbate loading, concentration, contact time, and temperature were studied in detail. Among different kinetic models such as pseudo‐first‐order, pseudo‐second‐order, and intra‐particle diffusion, pseudo‐second‐order kinetics was...

article

Nanoparticle induced chemical system for consolidating loosely bound sand formations in oil fields

Saurabh Mishra, Keka Ojha

Journal of Petroleum Science and Engineering > 2016 > 147 > C > 15-23

Migration of sand loosely bound, and younger age formation causes severe problems in the hydrocarbon production. Several techniques and methods have been implemented in field to control the sand production but only a few have been successful partially to stop sand migration to wellbore and subsequently to the surface. Rendering the formation sand particles immobile by binding them together at their...

article

Experimental investigation of rheological properties in zwitterionic-anionic mixed-surfactant based fracturing fluids

Atrayee Baruah, Dushyant S. Shekhawat, Akhilendra K. Pathak, Keka Ojha

Journal of Petroleum Science and Engineering > 2016 > 146 > C > 340-349

Zwitterionic-anionic mixed surfactant systems offer synergistic interactions in aqueous medium due to polymorphism of self-assembly structures that have combined properties of surfactants in the mixture. In this paper, a comparative study is done on rheological properties of Viscoelastic Surfactant (VES) based fracturing fluids (FF) developed from CAPB+NaOA/iso‐amyl alcohol/clove oil/water and CAPB+SDS/iso‐amyl...

article

Study on rheology and thermal stability of mixed (nonionic–anionic) surfactant based fracturing fluids

Atrayee Baruah, Akhilendra K. Pathak, Keka Ojha

AIChE Journal > 62 > 6 > 2177 - 2187

Mixed surfactant systems have gained significant importance in the development of fracturing fluid due to polymorphism of self‐assembly structures that have combined properties of the surfactants in the mixture. In this article, a comparative study on the phase behavior and viscoelastic properties of mixed surfactant based fluids, prepared from Tween 80+NaOA/2‐ethyl hexanol/clove oil/water and Tween...

article

Application of an improvised inorganic–organic chemical mixture to consolidate loose sand formations in oil fields

Saurabh Mishra, Keka Ojha

Journal of Petroleum Science and Engineering > 2016 > 137 > Complete > 1-9

Sand production in the reservoir has been acknowledged as a critical issue related to oil/gas fields for many years because it gives rise to many serious problems in oil/gas production. Sand production from wells can damage surface and subsurface equipment as well as it can reduce the well productivity, thus it can have an adverse effect on economy of the oil production. Sand control includes various...

article

Phase behaviour and thermodynamic properties of lamellar liquid crystal developed for viscoelastic surfactant based fracturing fluid

Atrayee Baruah, Akhilendra K. Pathak, Keka Ojha

Chemical Engineering Science > 2015 > 131 > Complete > 146-154

Phase behaviour of SDS/iso-amyl alcohol/pine oil/water and SDS/tert-amyl alcohol/pine oil/water systems were investigated for the development of viscoelastic surfactant (VES) based fracturing fluids having lamellar structures. The effects of co-surfactant, alkali, salt and nano-particle on rheology and thermodynamics of the lamellar liquid crystals were investigated. In contrast to tert-amyl alcohol,...

article

Development of an Empirical Model for Settling of Solids in Gelled Foams

Amit Saxena, Keka Ojha, A. K. Pathak

Arabian Journal for Science and Engineering > 2015 > 40 > 6 > 1757-1776

The underbalanced drilling fluid plays a vital role in the field of exploration of coal bed methane and tight gas reservoirs. It is used to minimize the formation damage and other drilling associated problems. Foam is considered as a popular alternative over the air in underbalanced drilling operations. Development of stable and uniform foam and prediction of its rheological behaviour under dynamic...

article

Screening of microemulsion properties for application in enhanced oil recovery

Achinta Bera, T. Kumar, Keka Ojha, Ajay Mandal

Fuel > 2014 > 121 > Complete > 198-207

Microemulsion in enhanced oil recovery is an efficient tool because of its high level of extraction efficiency of residual oil from natural oil reservoir. In the present paper the effect of salinity on anionic microemulsion phase behavior has been investigated by water solubilization method. Interfacial tensions between crude oil and brine, surfactant solution and microemulsion have been measured...

article

Effect of Branched Alcohols on Phase Behavior and Physicochemical Properties of Winsor IV Microemulsions

Neetha V. Thampi, Keka Ojha, Udayabhanu G. Nair

Journal of Surfactants and Detergents > 2014 > 17 > 2 > 371-381

The microemulsion phase behavior and physicochemical properties of surfactant–water–alcohol–oil systems are the pioneer laboratory study as a function of alcohol, water content and temperature to develop an experimental investigation for a better understanding of the microstructure of a single phase microemulsion and its stability under reservoir condition during hydraulic fracturing to recover the...

article

Adsorption of surfactants on sand surface in enhanced oil recovery: Isotherms, kinetics and thermodynamic studies

Achinta Bera, T. Kumar, Keka Ojha, Ajay Mandal

Applied Surface Science > 2013 > 284 > Complete > 87-99

Adsorption of surfactants onto reservoir rock surface may result in the loss and reduction of their concentrations in surfactant flooding, which may render them less efficient or ineffective in practical applications of enhanced oil recovery (EOR) techniques. Surfactant flooding for EOR received attraction due to its ability to increase the displacement efficiency by lowering the interfacial tension...

article

Synergistic Effect of Mixed Surfactant Systems on Foam Behavior and Surface Tension

Achinta Bera, Keka Ojha, Ajay Mandal

Journal of Surfactants and Detergents > 2013 > 16 > 4 > 621-630

Foam and surface tension behaviors of different ionic/nonionic surfactant solutions along with their different combinations have been investigated. Among different surfactants, sodium dodecyl sulfate showed the highest foamability over other surfactants. Mixed surfactant systems were always found to have higher foamability than the individual surfactant. It was also noticeable that nonionic surfactants...

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RHEOLOGY (6)
HYDRAULIC FRACTURING (4)
FOAM (3)
PROPPANT (3)
SURFACTANT (3)
THERMAL STABILITY (3)
VISCOSITY (3)
ENHANCED OIL RECOVERY (2)
HYDRAULICS (2)
KINETICS (2)
LAMELLAR (2)
MICROEMULSION (2)
MIXED SURFACTANT (2)
NANO-PARTICLE (2)
PERMEABILITY (2)
SURFACE TENSION (2)
VISCOELASTIC (2)
3D PORE STRUCTURE (1)
ADSORPTION (1)
ADSORPTION ISOTHERM (1)
ADSORPTION KINETICS (1)
ALKYLATION (1)
ASP FLOODING (1)
BIO-POLYMER (1)
BSO EQUATION (1)
BUBBLE SIZE (1)
CATECHOL (1)
CBM RESERVOIRS (1)
CHAIN LENGTH COMPATIBILITY (1)
CHEMICAL ENGINEERING (1)
CHEMICAL SAND CONSOLIDATION (1)
CHEMISTRY (1)
CO-SURFACTANT (1)
COMPRESSIVE STRENGTH (1)
CRITICAL THRESHOLD WATER FRACTION (1)
CROSSOVER EFFECT (1)
CUTTINGS TRANSPORT (1)
DISPERSE SYSTEMS (1)
DISPERSED OIL DROPLET (1)
DISPLACING FLUID (1)
DRILLING FLUID (1)
DROPS (1)
ELASTIC GEL (1)
EMULSION (1)
EMULSIONS (1)
ETHOXYLATED SECONDARY ALCOHOLIC SURFACTANT (1)
FF (1)
FLOODING (1)
FLOODS (1)
FLY ASH (1)
FOAM STABILITY (1)
FOAMABILITY (1)
FRACTAL DESCRIPTION (1)
GAS ADSORPTION (1)
GEAR OIL (1)
GEL (1)
GEL BREAK STRESS (1)
GENETIC ALGORITHM (1)
GEOCHEMISTRY (1)
HALF-LIFE (1)
HERSCHEL-BULKLEY (1)
INTERFACIAL COMPOSITIONS (1)
INTERFACIAL TENSION (1)
INTERFACIAL TENSION (IFT) (1)
ISOTHERM MODEL (1)
JHARIA COALFIELD (1)
KARAYA (1)
LIQUID CRYSTAL (1)
LIQUID CRYSTALS (1)
LOOSE FORMATION (1)
LOSS ON IGNITION (1)
METHOD OF MOMENT (MOM) (1)
MICROEMULSION FLOODING (1)
MICROEMULSION PHASE BEHAVIOR (1)
MICROEMULSIONS (1)
MIXED SURFACTANTS (1)
NANOCOMPOSITE (1)
NANOSIO2-UF (1)
NANO‐PARTICLE (1)
OIL RECOVERY (1)
OIL-IN-WATER EMULSIONS (1)
OILFIELD (1)
PARTICLE SIZE DISTRIBUTION (1)
PARTICLE SWARM OPTIMIZATION (1)
PERMEABILITY RETENTION (1)
PETROLEUM (1)
PETROLEUM INDUSTRY (1)
PHASE BEHAVIOR (1)
PHENOL (1)
PHOTO-OXIDATION (1)
PHYSICOCHEMICAL PROPERTIES (1)
PIPE DIAMETER (1)
PROPPANT SUSPENSION (1)
PSEUDO-TERNARY PHASE DIAGRAM (1)
RESERVOIR CHARACTERIZATION (1)
RESIDENCE TIME DISTRIBUTION (RTD) (1)
RESOURCE ESTIMATION (1)
RHEOLOGICAL PROPERTIES (1)
SAND (1)
SAND CONSOLIDATION (1)
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Asia‐Pacific Journal of Chemical Engineering (3)
Journal of Petroleum Science and Engineering (3)
Chemical Engineering Journal (2)
Colloids and Surfaces A: Physicochemical and Engineering Aspects (2)
Fuel (2)
Journal of Chemical & Engineering Data (2)
Journal of Surfactants and Detergents (2)
Organic Process Research & Development (2)
Rheologica Acta (2)
AIChE Journal (1)
Applied Surface Science (1)
Arabian Journal for Science and Engineering (1)
Chemical Engineering Science (1)
Egyptian Journal of Petroleum (1)
Energy & Fuels (1)
Industrial & Engineering Chemistry Research (1)
Journal of Petroleum Exploration and Production Technology (1)
Journal of the Taiwan Institute of Chemical Engineers (1)
Marine and Petroleum Geology (1)
Materials Today: Proceedings (1)
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INFONA - science communication portal

Search results for: Keka Ojha

Characterization of porous media by chemical tracers using time‐of‐flight and residence time distribution concept

Integrated fractal description of nanopore structure and its effect on CH4 adsorption on Jharia coals, India

Correction to: Rheological studies and optimization of Herschel-Bulkley flow parameters of viscous karaya polymer suspensions using GA and PSO algorithms

Rheological studies and optimization of Herschel-Bulkley flow parameters of viscous karaya polymer suspensions using GA and PSO algorithms

Synergistic effects of polymer and bentonite clay on rheology and thermal stability of foam fluid developed for hydraulic fracturing

Evaluation of Eocene source rock for potential shale oil and gas generation in north Cambay Basin, India

Rheological, structural and morphological studies of Gum Tragacanth and its inorganic SiO2 nanocomposite for fracturing fluid application

Experimental and modeling hydraulic studies of foam drilling fluid flowing through vertical smooth pipes

Rheological Studies of Gum Tragacanth as a Prospective Candidate for Hydraulic Fracturing

Studies on kinetics and thermodynamics of Cr(VI) adsorption onto sand to check feasibility of its use as tracer in oilfields

Nanoparticle induced chemical system for consolidating loosely bound sand formations in oil fields

Experimental investigation of rheological properties in zwitterionic-anionic mixed-surfactant based fracturing fluids

Study on rheology and thermal stability of mixed (nonionic–anionic) surfactant based fracturing fluids

Application of an improvised inorganic–organic chemical mixture to consolidate loose sand formations in oil fields

Phase behaviour and thermodynamic properties of lamellar liquid crystal developed for viscoelastic surfactant based fracturing fluid

Development of an Empirical Model for Settling of Solids in Gelled Foams

Screening of microemulsion properties for application in enhanced oil recovery

Effect of Branched Alcohols on Phase Behavior and Physicochemical Properties of Winsor IV Microemulsions

Adsorption of surfactants on sand surface in enhanced oil recovery: Isotherms, kinetics and thermodynamic studies

Synergistic Effect of Mixed Surfactant Systems on Foam Behavior and Surface Tension

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