Oil Recovery Articles

  • Gas injection to increase recovery from the Bakken formation

    The Bakken formation, in the Williston Basin, has tremendous oil reserves estimated to be in the hundreds of billions of barrels. During the last decade, the Bakken has been rapidly developed with advances in horizontal drilling and improved multi–stage hydraulic fracturing. The primary recovery factor, however, has remained very low, around 5%–10% due in part to the extremely low permeability. ...


    By Inderscience Publishers

  • How Does the Recent Oil Slump Compare?

    There’s no question that the recent slump in oil prices is historical in both its extent and global implications. But how does it compare to other famous oil slumps in history? From June 2014 until the end of the year, crude dropped 49% overall. It turns out it is a big decline, but nothing that trumps the storied slumps of 1990-91, 1996-98, or late 2008. During the Financial Crisis, oil ...


    By GLOBE SERIES

  • Evaluation of sweep efficiency in flooding process of reservoir development using substitution index

    On the basis of a mathematically proposed concept, substitution index (SI), a practical method has been successfully applied to accurately evaluate the sweep efficiency during the development of reservoirs (e.g., waterflooding or polymer flooding). More specifically, the region that is swept by the injected water or the degree of sweeping in a specific region can be quantitively determined by ...


    By Inderscience Publishers

  • Long core physical simulation for CO 2 flooding in low permeability reservoir

    CO 2 flooding is a proven great method to be used for enhancing injection capacity and increasing oil production in low permeability reservoir. In this paper, based on the natural cores and crude oil of Jilin oilfield, three sets of long core tests were conducted to study oil recovery, GOR and pressure variations during water flooding and CO 2 flooding. The performance of advanced CO ...


    By Inderscience Publishers

  • Hydrotreater proven at small scale and expanded skillfully case study

    Bango Refining, USA, was using fixed-bed clay process for upgrading distillates recovered from used oil. The product had poor color, poor oxidation stability and there was no control over reduction of sulfur in the final products. From March 2009, with the Sequoia-supplied hydrotreater, Bango Oil started making Group 2+ base oil product that is ‘water white’. In 2012, the small ...


    By Sequoia Global, Inc.

  • Experimental investigation of water alternating CH 4 -CO 2 mixture gas injection in light oil reservoirs

    This paper studies a WAG process for improving the recovery efficiency in light oil reservoirs. Until now, few references have reported the role of CO 2 mole percent on recovery improvement in light oil reservoirs. The injected gas was changed, and the effect of composition changes on performance of core flood experiments were conducted at fixed flow rate. Five series of experiments (varied in ...


    By Inderscience Publishers

  • Microbes in oil E&P

    The role of microbes in the oil industry, both detrimental and beneficial, has now become more and more accepted. Reservoir souring and microbial influenced corrosion cost the oil and gas business millions of dollars every year, and require adequate mitigation and surveillance strategies. Monitoring using modern molecular microbiological methods has facilitated a better understanding of ...


    By Energy Institute (EI)

  • Production performance of water alternate gas injection techniques for enhanced oil recovery: effect of WAG ratio, number of WAG cycles and the type of injection gas

    Production performance of a water alternate gas injection (WAG) method has been reported for the effect of several operating parameters, such as, WAG injection cycles, viz. , single cycle WAG and five-cycle WAG and the tapered WAG at the reservoir conditions of 120 ° C and 230 kg/cm 2 for hydrocarbon gas and CO 2 gas. It is observed that the number of ...


    By Inderscience Publishers

  • Synthesis and performance evaluation of novel alcohol ether carboxylate surfactants for alkali-surfactant-polymer flooding

    Novel surfactants alcohol polyoxypropylene polyoxyethylene ether carboxylates (APPEC) were successfully synthesised by carboxymethylation reaction of alcohol polyoxypropylene polyoxyethylene ether (APPE) to meet alkali-surfactant-polymer (ASP) flooding needs. The structure of APPEC was characterised by Fourier transform infrared (FTIR) spectrometry. The reaction conditions of APPEC including ...


    By Inderscience Publishers

  • The Next-Generation Water Filter for the Oil and Gas Industry

    Many segments of the oil and gas production industry need improvements in water filtration over traditional methods. This is true because of the trend toward oil and gas production in tighter, less permeable reservoirs and the greater use of enhanced oil recovery (EOR) techniques, many of which involve injecting water into the oil reservoir. To protect the integrity of such reservoirs, the amount ...


    By Eco-Tec Inc.

  • Effect of oil on the stability of polymer enhanced foams

    The enhanced oil recovery (EOR) results of foam flooding depend largely on the stability of foam flow within reservoirs in the presence of crude oil. Experimental studies indicated that oil would impact the foam stability greatly. This paper discussed the effect of oil on the stability of polymer enhanced foams. Two commercial polymers including hydrolysed polyacrylamide (HPAM) and modified ...


    By Inderscience Publishers

  • UK tax breaks stimulate renewed activity

    A combination of sustained high oil prices, limited economic recovery and supportive government tax policy, most notably in the UK led to an increased number of field start-ups in the North Sea in 2012 compared to the previous year, writes Chris Skrebowski. The maturity of the North Sea is clearly shown by the ongoing oil production declines seen for the three major producers - Norway, the UK and ...


    By Energy Institute (EI)

  • Simple method estimates the variation of oil production rate with oil–water viscosity ratio and water injection rate

    The proper design and maintenance of waterfloods requires comprehension of how viscous oil can be displaced by water, and how oil recovery can be optimised. In this work, simple predictive tools are developed to rapidly investigate the variation of heavy oil production rate with oil water viscosity ratio and water injection rate for 5–spot waterflood. Estimations are found to be in excellent ...


    By Inderscience Publishers

  • Slightly hydrophobic silica nanoparticles for enhanced oil recovery: interfacial and rheological behaviour

    This paper is aimed at studying AEROSIL® R816 nanoparticle behaviour to see if it has enough feasibility to be used as a chemical agent in enhanced oil recovery (EOR) processes. The main focus is on interfacial and rheological behaviour of this particle in aqueous and polymeric media. Interfacial tension measurements between aqueous nanoparticle suspensions and oil showed that AEROSIL® R816 ...


    By Inderscience Publishers

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