Publications
53 results found
Vinogradov J, Jackson MD, 2015, Zeta potential in intact natural sandstones at elevated temperatures, Geophysical Research Letters, Vol: 42, Pages: 6287-6294, ISSN: 1944-8007
We report measurements of the zeta potential of natural sandstones saturated with NaCl electrolytes of varying ionic strengths at temperatures up to 150°C. The zeta potential is always negative but decreases in magnitude with increasing temperature at low ionic strength (0.01 M) and is independent of temperature at high ionic strength (0.5 M). The pH also decreases with increasing temperature at low ionic strength but remains constant at high ionic strength. The temperature dependence of the zeta potential can be explained by the temperature dependence of the pH. Our findings are consistent with published models of the zeta potential, so long as the temperature dependence of the pH at low ionic strength is accounted for and can explain the hitherto contradictory results reported in previous studies.
Vinogradov J, Jackson MD, 2015, Zeta potential in intact natural sandstones at elevated temperatures, Geophysical Research Letters, ISSN: 1944-8007
Jackson M, Vinogradov J, 2013, Permanent reservoir monitoring using passive electrical measurements
Downhole monitoring of the spontaneous electrical potential (SP), using electrodes permanently installed on production or injection wells, is a promising new technology for imaging waterfronts and monitoring water movement in a hydrocarbon reservoir, in real time, during production. The method is distinct from other electrical methods because these require an active source and are limited in their depth of investigation. The SP signal is generated by moving water, salinity and temperature fronts in the reservoir, allowing a (much) greater depth of investigation and requiring less sophisticated downhole hardware. This presentation will review the results of numerical modelling and laboratory experimentation that suggests waterfronts can be monitored while they are several tens to hundreds of metres away from an instrumented well. Other potential applications, and the next steps required to implement the method as a viable technology, are also discussed.
Jackson MD, Vinogradov J, 2012, Impact of wettability on laboratory measurements of streaming potential in carbonates, COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Vol: 393, Pages: 86-95, ISSN: 0927-7757
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- Citations: 64
Saunders JH, Jackson MD, Pain CC, et al., 2012, Streaming potentials in hydrocarbon reservoir conditions, Geophysics, Vol: 77, Pages: E77-E90
Jackson MD, Butler AP, Vinogradov J, 2012, Measurements of Spontaneous Potential in Chalk with Application to Aquifer Characterisation in the Southern UK, Quarterly Journal of Engineering Geology and Hydrogeology
Jackson MD, Gulamali MY, Leinov E, et al., 2012, Spontaneous Potentials in Hydrocarbon Reservoirs during Waterflooding: Application to Waterfront Monitoring, SPE Journal
Jackson MD, Vinogradov J, Saunders JH, et al., 2011, Laboratory Measurements and Numerical Modeling of Streaming Potential for Downhole Monitoring in Intelligent Wells, SPE JOURNAL, Vol: 16, Pages: 625-636, ISSN: 1086-055X
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- Citations: 7
Jackson MD, Vinogradov J, Saunders JH, et al., 2011, Laboratory Measurements and Numerical Modeling of Streaming Potential for Downhole Monitoring in Intelligent Wells, SPE Journal
Vinogradov J, 2011, Multiphase streaming potential in sandstones saturated with gas/brine and oil/brine during drainage and imbibition, Geophysical Research Letters
Jackson MD, Vinogradov J, 2011, Impact of Wettability on Laboratory Measurements of Streaming Potential in Carbonates, Colloids and Surfaces A: Physiochemical and Engineering Aspects
Jackson MD, Gulamali MY, Leinov E, et al., 2010, Real-time measurements of spontaneous potential for inflow monitoring in intelligent wells, Pages: 4133-4150
Spontaneous potential (SP) is routinely measured using wireline tools during reservoir charactenzation. However, SP signals are also generated during hydrocarbon production, because of gradients in the water phase pressure (relative to hydrostatic), chemical composition and temperature. We suggest that measurements of SP during production, using electrodes permanently installed downhole, could be used to detect water encroaching on a well while it is several tens to hundreds of meters away. We simulate numerically the SP generated during production from a single vertical well, with pressure support provided by water injection. We vary the production rate, and the temperature and salinity of the injected water, to vary the contribution of the different components of the SP signal. We also vary the values of the so-called 'coupling coefficients' which relate gradients in fluid potential, salinity and temperature, to gradients in electrical potential. The values of these coupling coefficients at reservoir conditions are poorly constrained. We demonstrate that the SP signal peaks at the location of the moving waterfront, where there are steep gradients in water saturation and salinity. The signal decays with distance from the front, typically over several tens to hundreds of meters; hence the encroaching water can be detected before it arrives at the well. The SP signal at the well is dominated by the electrokinetic and electrochemical components arising from gradients in fluid potential and salinity. Larger signals will be obtained in low permeability reservoirs produced at high rate, saturated with formation brine of low salinity, or with brine of a very different salinity from that injected. Inversion of the measured signals in conjunction with normally available reservoir data could be used to determine the water saturation in the vicinity of the well, and to regulate flow into the well using control valves in order to maintain or increase oil production and delay o
Jaafar MZ, Jackson MD, Pain CC, et al., 2010, Measurements of Streaming Potential for Downhole Monitoring in Intelligent Wells, Exploration & Production – Oil and Gas Review, Vol: 8, Pages: 46-48
Leinov E, Vinogradov J, Jackson MD, 2010, Salinity Dependence of the Thermoelectric Coupling Coefficient in Brine-Saturated Sandstones, Geophysical Research Letters
Vinogradov J, Jaafar MZ, Jackson MD, 2010, Measurement of Streaming Potential Coupling Coefficient in Sandstones Saturated with Natural and Artificial Brines at High Salinity, Journal of Geophysical Research
Jaafar MZ, Vinogradov J, Jackson MD, 2009, Measurements of Streaming Potential Coupling Coefficient in Sandstones Saturated with High Salinity NaCl Brine, Geophysical Research Letters
Jaafar MZ, Vinogradov J, Jackson MD, et al., 2009, Measurements of streaming potential for downhole monitoring in intelligent wells, SPE, Vol: 120460
Jaafar MZ, Vinogradov J, Jackson MD, et al., 2009, Measurements of streaming potential for downhole monitoring in intelligent wells, SPE Middle East Oil & Gas Show and Conference
Vinogradov J, Rivin B, Sher E, 2008, NOx Reduction from Compression Ignition Engines with Pulsed Corona Discharge, Energy the International Journal
Yankelevich Y, Wolf M, Baksht R, et al., 2007, NOx Diesel Exhaust Gas Treatment Using a Pulsed Corona Discharge: the Pulse Repetition Rate Effect
Averbukh M, Rivin B, Vinogradov J, 2007, On-Board Battery Condition Diagnostics Based on Mathematical Modeling of an Engine Starting System, SAE Technical Paper
Vinogradov J, Rivin B, Sher E, 2006, NOx Reduction from Compression Ignition Engines with DC Corona Discharge – an Experimental Study, Energy the International Journal
Vinogradov J, Sher E, Rutkevich I, et al., 2001, Voltage-Current Characteristics of a Flame-Assisted Unipolar Corona, Combustion and Flame
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