Journal of
Petroleum and Gas Engineering

  • Abbreviation: J. Petroleum Gas Eng.
  • Language: English
  • ISSN: 2141-2677
  • DOI: 10.5897/JPGE
  • Start Year: 2010
  • Published Articles: 107

JPGE Articles

June 2013

Experimental study of new improved oil recovery from heavy and semi-heavy oil reservoirs by implementing immiscible heated surfactant alternating gas injection

  After thermal processes, steam injection is the most common enhanced oil recovery (EOR) methods in heavy oil reservoirs. It is common in heavy and semi heavy oil reservoirs to inject gas in conjugate with surfactant solutions to enhance the effect of gas on reservoir fluid which is called surfactant alternating gas (SAG) injection. The interest in immiscible and miscible SAG process has been grown...

Author(s): Mehdi Mohammad Salehi, Eghbal Sahraei and Seyyed Alireza Tabatabaei Nejad

  • Article Number: CBF2F989013

June 2013

Experimental study of surfactant alternating gas injection versus water alternating gas and water flooding enhanced oil recovery methods

  Nitrogen is used in both the miscible and immiscible gas injection processes in oil reservoirs. In heterogeneous formations, gas tends to early breakthrough due to overriding and fingering. Surfactant alternating gas (SAG) injection is one of the methods commonly used to solve this problem. The foam which is composed in contact area of nitrogen and surfactant, increases injected gas...

Author(s): Mehdi Mohammad Salehi, Mohammad Amin Safarzadeh, Eghbal Sahraei and Seyyed Alireza Tabatabaei Nejad

  • Article Number: 71D07589029

May 2013

Improving well productivity in an Egyptian oil field using radial drilling technique

  Radial drilling (RD) technique utilizes hydraulic energy to create several lateral holes in different directions and levels with several lengths. These lateral holes are made by milling the casing with small bit then extending these holes laterally using high pressure hydraulic jetting. This work presents full descriptions and analysis for RD applications in one of the Egyptian oil field. Moreover, it...

Author(s): Adel M. Salem Ragab

  • Article Number: 6AA0F518921

May 2013

Development of a new surfactant-polymer system and its implementation in Dagang oilfield

  In this paper, a new surfactant–polymer enhanced oil recovery (EOR) system is investigated for the feasibility of injection in Dagang. The newSP flooding system has been designed and developed for Dagang oilfield with Dagang petroleum sulfonate (SLPS) as the primary ingredient. The dynamic behavior of the system and the interactions of the system components have been investigated through...

Author(s): Hongyan Wang and Brian Miller 

  • Article Number: 690EE9F8945

May 2013

Flue gas enhanced oil recovery (EOR) as a high efficient development technology for offshore heavy oil in China

  China Offshore oilfield is rich in heavy oil, M oilfield in Bohai Bay is the most thick heavy oil field in offshore by far with the formation oil viscosity as high as 450 ~ 950 mPa.s.  Using conventional oil field development (depletion and water flooding), the heavy oil field exposed its limits, such as low productivity of single well, low production rate and low predicted recovery. As is well known,...

Author(s): Dong Liu and Wenlin Li

  • Article Number: 70FDB9E8978

April 2013

Comparison between spreadsheet and specialized programs in calculating the effect of scale deposition on the well flow performance

  Formation damage is an undesirable operational and economic problem that causes a reduction in the productivity, skin damage, and decrease in well performance. Formation damage occurs during the various phases of oil and gas recovery from subsurface reservoirs including production, drilling, hydraulic fracturing, and work over operations. Formation damage assessment, control, and remediation are among the...

Author(s): Khulud .M. Rahuma, F. Sondi, M. Milad and M. AbuGheit

  • Article Number: 052DDB98864

April 2013

Modeling of thermal cracking process in a crude oil refinery

  In a thermal cracking process, the molecular bonds of the liquid are broken to the lighter ones. Recently due to the availability of more heavy oils, the process interest was to yield light and middle distillate products. In this research, thermal cracking of vacuum residue in a commercial soaker-visbreaking plant is studied. The product of the process is characterized to the light gas (C1, C2), liquefied...

Author(s): Sepehr Sadighi and S. Reza. Seif Mohaddecy

  • Article Number: 466BD168875

April 2013

Variation of petrophysical properties due to carbon dioxide (CO2) storage in carbonate reservoirs

  Depleted hydrocarbon reservoirs, deep saline reservoirs, and un-mineable coal seams are considered the best geological sequestration candidates for carbon dioxide (CO2) geologic storage formations. CO2 sequestration in carbonate reservoirs provides a good way to reduce CO2 release to the atmosphere. This work investigates the effect of the temperature, pressure, and brine salinity on the...

Author(s): Adel M. Salem and Shedid A. Shedid

  • Article Number: 112DC8C8886

March 2013

Sonic log analysis in oil wells through Box and Jenkins methodology

The sonic profile is used, mainly in exploration wells, which receive greater investment in data acquisition because these wells serve as a reference for analyzing the petroleum potential of the area. The sonic profile was introduced in the 50s, with the goal of providing support for seismic exploration, and subsequently became extensively used for studies on total porosity of the rocks traversed by the well. This paper...

Author(s): Suzana Leitão Russo, Jéssica Santos de Jesus, Daiane Costa Guimarães, João Antonio Belmino dos Santos and Maria Emilia Camargo

March 2013

Microbial enhanced oil recovery using potent biosurfactant produced by Pseudomonas sp. from Arabian Sea, Mumbai

Increase in oil pollution due to accidental leakages during various ship operations and human activities make these hydrocarbons the most common global environmental pollutants. Current understanding in degradation of these harmful oils involves the isolation of biosurfactants from various isolated microbial strains from contaminated sites of Marine Sea. Biosurfactants are the surface active molecules synthesized by...

Author(s): Seema Dhail

March 2013

A new simulator for surfactant flooding

Surfactant as a successful enhanced oil recovery (EOR) agent has been widely used in many mature reservoirs. This research focuses on the description of surfactant solution at low permeability condition. A new three-dimensional, two-phase, three-component surfactant simulator is presented. The simulator is based on the non-Darcy flow characteristics of surfactant flooding in the low permeability formations. The change...

Author(s): Yongwei Li

February 2013

Real-time expert seismology by non-linear oil reserves expert system

  A non-linear 3-D elastic waves real - time expert system is proposed for the exploration of land and marine oil reserves, according to the new theory of "Real-Time Expert Seismology". This Generic Technology will work under Real Time Logic for searching the land and marine petroleum developed on the continental crust and on deeper water ranging from 300 to 2000 m, or 3000 m, or even more. Hence, the...

Author(s): E. G. Ladopoulos

  • Article Number: 550BF3F4750

February 2013

Development of enhanced oil recovery in Daqing

  Chemical flooding is playing an important role in stabilizing oil output in Daqing, which is the largest field in China and started its chemical floods since the last 90's. In Daqing Oilfield, the chemical flooding annual output has exceeded 17 million tons; water cut has been dropped down significantly. The success of chemical enhanced oil recovery (EOR) has encouraged the increasing of chemical...

Author(s): Liu Renqing

  • Article Number: E33B9484775

January 2013

Investigation into the rheological and filtration properties of drilling mud formulated with clays from Northern Nigeria

  Rheological properties of drilling mud formulated from ten samples of Nigerian clay and treated with sodium carbonate (Na2CO3) were determined. Four different formulations were made: A (22.5 g / 350 ml of mud + 0% Na2CO3), B (22.5 g / 350 ml of mud + 10% Na2CO3), C (25 g / 350 ml of mud + 10% Na2CO3) and D (28 g / 350 ml of mud + 10% Na2CO3). None of the samples tested in their natural state exhibited...

Author(s): O. Omole, James O. Adeleye, Olugbenga Falode, S. Malomo and O. A. Oyedeji

  • Article Number: 0A6F2014676

January 2013

Determination of petroleum property using artificial intelligence tools

  Viscosity is one of the most important governing parameters of the fluid flow, either in the porous media or in pipelines. So it is important to use an accurate method to calculate the oil viscosity at various operating conditions. In the literature, several empirical correlations have been proposed for predicting crude oil viscosity. However these correlations are not able to predict the oil viscosity...

Author(s): Reza Abedini and Amir Mosayebi

  • Article Number: 4B5ECDB4694

December 2012

Introduction to catalytic oxidation of olefins

  The national and international circumstances of catalytic oxidation of olefins were simply introduced in this paper. And the synthesis method of catalytic oxidation of olefins are discussed in detail, such as, catalytic gas-phase oxidation of olefins; catalytic liquid-phase oxidation of olefins; catalytic oxidation of enzyme; catalytic oxidation of olefins with sodium hypochlorite and hydrogen peroxide as the...

Author(s): Huang Wei and You Hongjun

  • Article Number: 8218B234622

December 2012

Sensitivity analysis and determination of optimum temperature of furnace for commercial visbreaking unit

  In this study the visbreaking unit of Tehran refinery was simulated and then a parametric sensitivity analysis was carried out for determination of optimum temperature. The Petro-Sim simulator, which specializes in the simulation of refinery processes, was used in this study. Initially the simulator was validated using actual plant test runs and after tuning, the simulations provided errors less than 3%....

Author(s): S. Reza Seif Mohaddecy, Mehrdad Alibouri and Sepehr Sadighi

  • Article Number: 62896764636

December 2012

Chemical treatment of emulsion problem in crude oil production

  Remediation of water in the course of crude oil production has been a costly process and it has hampered the production activities in many parts of the world. In this research work, effective separation of emulsion using demulsifiers (castor oil and sulphuric acid) in six separate formulations was accessed. The result shows that using sulphuric acid as a demulsifier in 500 and 1000 revolution per minute in...

Author(s): Udonne J. D.

  • Article Number: 4A1C9C14657

November 2012

Treatment of crude-oil contaminated soil using biosurfactants

  In this research, the effect of Saponin as a bio surfactant for crude-oil removal by the concentration of 10000 and 30000 ppm in a column soil sample was evaluated. The experimental parameters and their value levels investigated were: concentration of surfactant solutions (0.05, 0.1 and 0.2%-mass); pH (7, 9 and 11); Alkali (NaOH) and polymer (Xanthan Gum) (0.6 and 0.1%-mass) and (0.7 and 0.2%-mass)...

Author(s): A. Khodadadi, Hossein Ganjidoust and S. N. Seyed Razavi

  • Article Number: 7EBDEED4578

November 2012

Simulation, control and sensitivity analysis of crude oil distillation unit

  Steady-state  and dynamic simulation play important roles in investigation of refinery units. Therefore, simulation can help this investigation and behavior assessment. In this paper, simulation was done by commercial software. In fact, because of solving many state equations simultaneously and using control theory, dynamic simulation has more significant impact than steady-state simulation. Flow,...

Author(s): Akbar Mohammadi Doust, Farhad Shahraki and Jafar Sadeghi

  • Article Number: A4795AA4590

November 2012

Identifying the flow dimension in fractured rock using an interference test

  The actual flow dimension in fractured rock may be between 2-D cylindrical flow and 1-D linear flow. This paper demonstrated the importance of the method used to identify the flow dimension in fractured rock correctly. A case study of a long-duration interference test was presented to illustrate the application of Barker’s type curves and to identify a flow dimension in fractured rock. It was difficult...

Author(s): H. S. Liang, S. L. Lin, T. K. Huang, D. L. Chen and M. C. Tom Kuo

  • Article Number: EA4FEB84600

October 2012

Effect of inertia in the study of two-phase oil-gas flow in horizontal pipelines

  The flow of oil and gas in the production pipelines is a crucial step for the oil industry, which always seeks to maximize the production of these valuable hydrocarbons. The modeling of the flow patterns allows a better analysis of the behavior of the...

Author(s): A. C. Pacheco, A. F. Souza, D. P. Costa, D. A. G. Aranda and L. D. T. Câmara

  • Article Number: 2C2216B4538

April 2012

Simulation of surfactant based enhanced oil recovery

  Chemical flooding is an important process for enhanced oil recovery. A substantialamount of remaining oil resides in reservoirs especially in carbonate oil reservoirs thathave low primary and waterflood oil recovery. Most of the chemical flooding studies to date have been performed in water-wet sandstone...

Author(s): Wan Rosli Wan Sulaiman, and Euy Soo Lee

  • Article Number: AB8799C4512

March 2012

Numerical modelling of the fluidynamics in a bubbling fluidized bed biomass gasifier

  The fluid dynamics presented in this paper for a fluidized bed gasifier consists of estimating the volume fraction fields of gas and solid phases, as well as the velocity fields of gas and solid phases and the pressure drop inside the fluidized bed. However, understanding of the flow characteristics has an important role in understanding of the operation of the gasifier. The analyzed system consists of the...

Author(s): Silva J. D.

  • Article Number: 1BAA8F94472

March 2012

Corrosion-erosion on waste heat recovery boiler system via blowdown optimization

  It is estimated that problems due to corrosion-erosion of boiler system cost industries billions of dollars per year. Method of corrosion-erosion control varies depending upon the type of problem encountered. This study is focused on the optimization of the boiler blowdown frequency and its effect on the chemical values of the water-steam cycle. Parameters such as conductivity, iron and silica concentrations...

Author(s): Zainal Zakaria and Nor Ismail Hashim

  • Article Number: C2F93634481

February 2012

Process parameters for maximum power of a proton exchange membrane fuel cell

  Pressure and temperature of the cell are the effective parameters in performance of proton exchange membrane (PEM) fuel cell. In this study, a genetic algorithm is applied to determine operating conditions that result in maximum power density of a proton exchange membrane fuel cell (PEMFC). A quasi two dimensional, isothermal model is presented for PEM fuel cell and the polarization curve of the system could...

Author(s): Mojtaba Tafaoli-Masoule, Mohsen Shakeri and Arian Bahrami

  • Article Number: 89E57E54432

February 2012

Statistical analysis and evaluation of lithofacies from wireline logs over ‘Beleema’ field, Niger Delta, Nigeria

  A statistical analysis of well-log data for the purpose of estimating and evaluating lithofacies with depth, around ‘Beleema’ field, Niger Delta, was carried out. The principal component analysis (PCA) technique and the bulk volume water and the grain size relationships formed the main principles of analysis. The PCA was applied to selected lithology-sensitive logs, each serving as a variable...

Author(s): Enikanselu P. A and Ojo A. O

  • Article Number: CF217504457

February 2012

Minimizing entropy generation for louvered fins in a plate-fin compact heat exchanger

  With distributed power generation market, the most economical solution today is to generate power through small gas turbine systems, arbitrarily categorized as microturbines (5 to 200 kW) orminiturbines (200 to 500 kW). The thermal efficiency of such microturbines is about 20% or less if no recuperator is used in the system but, using a recuperator operating at 87% effectiveness, the efficiency...

Author(s): Masoud Asadi and Nasrin Dindar Mehrabani

  • Article Number: 3C55BBF4766

January 2012

Fast combustion assisted gravity drainage (FCAGD) process for heavy oil recovery enhancement

  "Fast combustion assisted gravity drainage" (FCAGD) process is a novel heavy oil recovery enhancement method which is a specific combination of the two in-situcombustion process and steam assisted gravity drainage process. In this paper, the novel FCAGD thermal heavy oil recovery enhancement process has been presented by an improved simulation with an Eclipse500 simulator and has been...

Author(s): Mehrdad  Alemi, Mansour Kalbasi, and  Fariborz Rashidi,

  • Article Number: 4ABC4674715

November 2011

Prediction of the enthalpy of vaporization according to the temperature far from the critical point by the group contribution method with interactions of pure hydrocarbons, simple mixtures and oil fractions

  In this research, we employed a new method to calculate vaporization enthalpy of pure hydrocarbons. This equation is a function of the temperature, far from critical point and was tested for simple mixtures and oil fractions. Comparing values with the literature, the equation established have improved results in term of average standard deviation. We also applied the equation to the oil fractions; it required...

Author(s): O. Rebas, H. Zait, N. Skander and E. C. Chitour

  • Article Number: AEA9CBC3926

November 2011

Filter cake formation on the vertical well at high temperature and high pressure: Computational fluid dynamics modeling and simulations

  Oil and gas wells are generally drilled with the intention of forming a filter cake on the wellbore walls to primarily reduce the large losses of drilling fluid into the surrounding formation. Unfortunately, formation conditions are frequently encountered that may result in unacceptable losses of drilling fluid into the surrounding formation despite the type of drilling fluid employed and filter cake created....

Author(s): Mohd. A. Kabir and Isaac K. Gamwo

  • Article Number: 34FCA323950

October 2011

Two-dimensional based method in history matching problem

  The flow of oil and gas in the production pipelines is a crucial step for the oil industry, which always seeks to maximize the production of these valuable hydrocarbons. The modeling of the flow patterns allows a better analysis of the behavior of the...

Author(s): Faridoon Shabaninia

  • Article Number: B365B564553

September 2011

Pyrolysis behaviour and kinetics of Moroccan oil shale with polystyrene

  Pyrolysis of oil shale/polystyrene mixture was performed in a thermogravimetric analyzer (TGA) from room temperature of 1273K, at heating rates of 2, 10, 20, 50 and 100 K/min. The global mass loss during oil shale/polystyrene pyrolysis was modelled by a combination of mass-loss events for oil shale and polystyrene volatiles. TGA results indicate that mixture pyrolysis can be identified in three phases. The...

Author(s): A. Aboulkas, K. El harfi, M. Nadifiyine and M. Benchanaa

  • Article Number: 8AD60B13778

September 2011

Reservoir characterization and evaluation of depositional trend of the Gombe sandstone, southern Chad basin Nigeria

  This study attempts a reservoir characterization and evaluation of depositional trend of sands to assess the petrophysical qualities of Gombe sandstone as a potential reservoir unit for hydrocarbon accumulation in the Chad basin. The economic viability in parts of the Chad basin outside Nigeria and other structurally related contiguous basins such as Doba, Doseo, Bongor fields, and Termit-Agadem basin in the...

Author(s): Adepelumi, A. A, Alao, O. A and Kutemi, T. F

  • Article Number: 3B42DDE3860

May 2011

Application of piezoelectric energy generated from quartz plus semiprecious metals on wax deposition control

  The primary focus of this research is to develop a tool using semi-precious metals and quartz for preventing or eliminating wax deposition in production and transport system. It also focuses on explaining the mechanisms of using piezoelectric energy generated from mixtures of semi-precious metals and quartz to prevent wax deposition. Five samples of waxy crude were sourced from Niger Delta and characterized...

Author(s): Sulaiman, A. D. I. Ajienka, A. J. and Sunday, I. S.

  • Article Number: 98A924A3702

May 2011

Water based mud lifting capacity improvement by multiwall carbon nanotubes additive

  Poor hole cleaning remains one of the major concerns in oil and gas industry since it will induce expensive drilling problems such as stuck pipe, slow drilling rate, high torque and drag, lost control of density and poor cement jobs. Various drilling fluids have been widely used in the oil and gas industry to improve lifting capacity of drilled cuttings. In this study, the experiment was conducted using water...

Author(s): Ariffin Samsuri and Amir Hamzah

  • Article Number: 56FD46E3745

April 2011

Thermal analysis of evacuated solar tube collectors

  A detailed design of the evacuated tube collectors is enumerated followed by the thermal network analysis of this collector. The temperature of each component is determined empirically. Numerical analysis is applied to find the coefficient of heat transfer across the air gap from absorber plate to the copper tubes. The performance characteristics of these collectors are analyzed and compared with commercially...

Author(s): Siddharth Arora, Shobhit Chitkara, R. Udayakumar and Muhammad Ali

  • Article Number: CF81F1C3607

April 2011

Application of genetic algorithm to hydrocarbon resource estimation

  Resource estimation is a process by which the economically recoverable hydrocarbons (HC) in place within a reservoir are calculated. The parameter that goes into resource estimation is variable and contains some aspect of risks. Resource can be defined as the total volume of hydrocarbon in place, which is further classified as reserve when proved commercially viable. Reserve estimation can be carried out...

Author(s): Hiren K. Patel, Anirbid Sircar, Soham Sheth and Reshmi Jadvani

  • Article Number: 4E326DA3622

March 2011

Methods of water saturation estimation: Historical perspective

  One of the most important tasks in reservoir engineering is characterizing different parameters of the reservoir. Water saturation is a parameter which helps evaluating the volume of hydrocarbon in reservoirs. Determination of this parameter started from 1942 by integrating some well logs in clean sandstones. After that, many scientists introduced some equations to validate this procedure in shaly sands and...

Author(s): Andisheh Alimoradi, Ali Moradzadeh and Mohammad Reza Bakhtiari,

  • Article Number: E5666AF3521

March 2011

Use of exhaust gas recirculation (EGR) and cyclonic separator for simultaneous NOx and PM reduction in DI diesel engines

  This study presents the results of exhaust gas recirculation (EGR) and cyclonic separator for simultaneous oxides of nitrogen (NOx) and particulate matter (PM) reduction in a direct injection (DI) diesel engine under different engine loads and speeds. There is a significant NOx reduction by EGR, but PM is hugely increased, especially at high EGR rate-high load conditions. A significant reduction in PM is...

Author(s): Murari Mohon Roy, S. M. Najmul Hoque, Md. Ariful Islam and Md. Mustafizur Rahman

  • Article Number: AED8C743537

March 2011

Dehyrogenation catalysts of higher normal paraffins on a nanocrystalline γ-Al2O3 support: Different impregnation sequences

  In this paper, high surface area nanocrystalline gamma alumina was synthesized by the sol-gel method using cationic surfactant. The Pt-based dehydrogenation catalysts consisting of promoters and support modifiers (Sn, In, Li and Fe) were prepared using the synthesized gamma alumina and employed in the dehydrogenation reaction of n-dodecane. The effects of different successive impregnation methods for Pt, Sn...

Author(s): Mandana Akia,, Seyed Mahdi Alavi, and Zi-Feng Yan

  • Article Number: 843FB603580

February 2011

A comparative study of recycling of used lubrication Oils using distillation, acid and activated charcoal with clay methods

  Lubricating oils are viscous liquids used for lubricating moving part of engines and machines. Since lubricating oils are obtained from petroleum – a finite product, and with dwindling production from world oil reserves, the need arises more than ever, to recycle used lubricating oils. Accordingly, this research effort focuses on comparative study of four methods of recycling of used lubrication oils:...

Author(s): Udonne J. D.

  • Article Number: F9F2DD03170

January 2011

Recovery energy from the separated and gravity type of heat pipe exchanger in China

  The national and international circumstance and the application of heat pipeline exchanger were simply introduced in this study, while an application of the separated and gravity types of heat pipeline exchanger was discussed at the recovery energy of the electrical factory, the desulphurisation unit, the construction industries and the air-conditioning system, respectively. Their heat pipeline...

Author(s): Huang Wei and You Hongjun

  • Article Number: 221D3633132

January 2011

Application of Nonlinear Reduction Techniques in Chemical Process Modeling

    Model reduction techniques have been used widely in all engineering fields especially in electrical, mechanical as well as chemical engineering. The basic idea of reduction technique is to replace the original system with much smaller state space dimension. A reduced order model is more beneficial to process and industrial field in terms of control purposes by using proper orthogonal decomposition...

Author(s): Ahmmed S. Ibrehem and Hikmat S. Al-Salim

  • Article Number: A8CD3283145

January 2011

System identification for experimental study for ultra high molecular weight for polyethylene process by using Bi-supported SiO2 / MgCl2 / TiCl4 catalyst

  In this work, system identification method is used to capture the reactor characteristics of production rate of polyethylene (PE) based on published experimental data. The identification method is used to measure the percentage effect on the production rate of PE by measuring the effect of input factors of temperature of reaction, hydrogen concentration, and [Al]/[Ti] molar catalyst ratio. Temperature of...

Author(s): Ahmmed S Ibrehem and Hikmat S. Al-Salim

  • Article Number: FC301F33982

January 2011

Hydromagnetic forced flow between a rotating disc and a naturally permeable stationary porous disc saturated with fluid

  This paper considers the flow of a conducting viscous incompressible fluid between two non-conducting parallel discs, when the magnetic field was applied perpendicularly to the discs. The upper disc is in steady rotation, while the lower one is a stationary porous disc. The whole flow is divided into two regions: the free fluid region (between two parallel discs) and the porous region (this flow is of porous...

Author(s): Bhupendra Kumar Sharma, Tara Chand and R. C. Chaudhary

  • Article Number: F54884C3994

December 2010

Chemical method for monitoring demulsification in oil industry

  A special and fast chemical method to detect and determine water separation from emulsified crude with accuracy (>97%) was developed. The method was applied successfully to determine the total amount of water in crude and its derivatives. Most methods available for the detection and estimation of low concentrations of water require either sophisticated equipment and/or take a long time. Chemical method...

Author(s): Hikmat S. Al-Salim, Ahmmed Saadi Ibrahim and Mohammed S. Saleem

  • Article Number: C651AA73053

December 2010

Optimum site selection of natural gas vehicles station in Bangkok using geographic information system

  This paper is to demonstrate the integration of spatial modeling and geographic information systems (GIS) can be used in the optimal site location for natural gas vehicles (NGV) station in Bangkok. Integration has been proposed as one of the characteristics which distinguish GIS from other information systems. Variables used as input in this process mainly address direct construction costs and station...

Author(s): Adsavakulchai S.  and Huntula C.

  • Article Number: 245C07D3069

November 2010

Optimization of plug utilized in lost circulation treatment while drilling

  The major problem of oil wells drilling is circulation lost that can occur near weak formations and before well cementing. Conventional methods such as lost circulation material pills, cement plugs and dual injection were used to combat different types of massive mud loss in spite of their small success rate and high cost and risk. A different circulation treatment has been introduced to optimize plugging of...

Author(s): Abdelkader Khiari, Djemoi Merzoug, Noureddine Gherraf, Mourad Kourichiand Noureddine Maza

  • Article Number: 7FC84A92990

November 2010

Nitrogen fixing capacity of legumes and their Rhizospheral microflora in diesel oil polluted soil in the tropics

  The nitrogen fixing capacity of legumes cowpea (Vigna unguiculata) and groundnut(Arachis hypogea) and their microflora grown in diesel oil simulated utisol was investigated. Result revealed that concentration as low as 1% v/w of diesel oil significantly affected the densities of nitrogen fixing bacteria, bacteriods, actinomycetes and fungi associated with the legumes. The heterotrophic...

Author(s): M. A. Ekpo and A. J. Nkanang

  • Article Number: 05A51843015

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