... Abstract While the principles of enhanced oil recovery (EOR) are not new, field implementation has been scarce, particularly in the case of dual-porosity naturally fractured reservoirs, where the interaction of two different porous media creates a more complex displacement process. Several...

... allows the LTG process to work with a wide variation of injection brine salinity or in-situ salinity gradient. The optimal injection strategies are then determined through a series of oil recovery core floods with co-injection of gas and the surfactant solution. Tertiary recovery of up to 90...

... Abstract Low salinity waterflood (LSF) is a promising technology for improving oil recovery. Several laboratory studies have demonstrated the potential of LSF to alter the rock wettability and improve oil recovery in carbonate reservoirs. Some studies have considered calcite dissolution...

... and shorter life cycles. Efforts are in place to maximise recovery by applying Enhanced Oil Recovery (EOR) techniques. Reservoir rocks saturated with hydrocarbons are complex in both a macroscopic and microscopic scale and this complexity controls the initial quantity and distribution of hydrocarbons and flow...

... 754,650 m 3 , and the stage oil recovery efficiency was enhanced by 3.0%. The polymer flooding is still effective, and we will get more oil from the polymer flooding. Upstream Oil & Gas incremental oil producer Bohai Bay total incremental oil experiment ld offshore oilfield enhanced...

... in chemical enhanced oil recovery ( cEOR ) due to their ability to eliminate the capillary forces by generating ultra-low interfacial tension ( IFT ) between the aqueous phase and the oil-in-place. The flow regime shifts from immiscible to a quasi-miscible one, allowing the brine to access the more isolated...

... entered into commercial applications stage. By the end of 2011, 54 industrial blocks of polymer flooding have been applied in Daqing Oilfield with 13% incremental oil recovery over water flooding in average. Ten key techniques for polymer flooding have been developed involving polymer screening...

... interesting from an economic perspective since it cumulates the value of the increase in oil recovery and the value of the gas storage activity while sharing the cost of gas compression / treatment and the benefits from the wells already in place. In addition, the implementation of such projects also allows...

... Abstract The impact of brine salinity and its ionic composition on oil displacement efficiency has been investigated extensively in recent years due to the potential of enhanced oil recovery (EOR). Wettability alterations through relative interactions at the mineral surface have been the basis...

... Abstract It was an argued issue concerning effects of emulsification in chemical combination flooding process. For example, it may increase oil displacement efficiency. On the other hand, it makes the produced liquid handing to be more difficult. How does emulsification impact on oil recovery...

... Abstract Wettability of the reservoir is a major parameter controlling the oil production profile during waterflooding, the breakthrough of injection water, the final oil recovery, and the residual oil saturation (S or ) trapped in the pore structure. Therefore identifying the wettability...

... expanded the reservoirs range suitable to carry out MEOR. enhanced recovery Upstream Oil & Gas indigenous microorganism Acta Petrolei Sinica alet al microorganism microbial method oil field viscosity crude oil enhanced oil recovery field test reservoir permeability microbe flooding...

... Abstract Alkali - surfactant - polymer (ASP) combination flooding technique is one of the effective enhanced oil recovery ways for mature oilfields. However, alkali can lead to difficulty of the scaling and emulsification problems in lifting and produced liquid treatment. So alkali-free...

... species, leading to an additional oil mobilization and consequently an increase in oil recovery. Finally, the ultimate adsorption (and thus required amount of chemicals) value will be significantly lower than with a constant salinity injection scheme, while maintaining high oil recovery efficiency ( Bazin...

... of supply to fill the void will be from Enhanced Oil Recovery (EOR) techniques applied to existing fields. The current global ultimate average recovery factor for oilfields is roughly 35%. This means that about two-thirds of the already discovered oil is left within the reservoir. Pushing the recovery...

... Abstract Among various Enhanced Oil Recovery (EOR) processes and techniques, Malaysia's matured offshore oilfield which is currently under water injection for pressure maintenance appears to be amenable to water alternating gas (WAG) implementation. EOR screening studies show that WAG EOR...

... at different shear rates, different pressures and mixing ratios, and at an operating temperature of 220°F. Special dual core flooding experiments were conducted using live oil at reservoir conditions to investigate the effectiveness of CO 2 -emulsion system in enhancing oil recovery. Several experiments were...

.... Numerical simulation of the SAG with and without hysteresis is used to assess the effect of the gas-entrapment on oil recovery and gas utilization factor in a field-scale application. chemical flooding methods Upstream Oil & Gas reservoir simulator simulator enhanced recovery microemulsion...

... Abstract ASP flooding achieves high incremental oil recovery factors over water flooding by reducing the interfacial tension (IFT) to ultralow values and by ensuring good mobility control, provided by the polymer. Traditionally, this has been achieved by tuning the ASP flood so...

... Abstract Low salinity waterflood (LSF) is a promising improved oil recovery (IOR) technology. Although, it has been demonstrated that LSF is an efficient IOR method for many sandstone reservoirs, the potential of LSF in tight oil reservoir is not well-established. This paper presents...