.... As the matrix capillary pressure increases, the capillary forces are more dominant. Matrix vertical permeability is also highlighted as a major player in oil recovery from dual-porosity reservoirs because of the gravity forces. Dual nature of naturally fractured reservoirs refers to the coexistence of two...

... 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...

... Injection velocity 1 ft/d Temperature 75°C 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...

... 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 behaviour of fluids within the reservoir. Therefore, reservoir...

... 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...

... waterflooding concentration enhanced recovery Austad experiment acid Upstream Oil & Gas brine concentration oil emulsion formation brine solution interaction acid participation fraction Oil Recovery emulsion formation composition crude oil participation final oil...

... 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...

...+ 133 Cl − 2013 HCO 3 − 14 SO 4 2− 274 K + 35 TDS 3632 Oil 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...

...Introduction Microbial flooding was a general designation of a series of technologies to increase oil production by propagation and metabolites of microbes ( He et al., 2013 ). In the current situation of low oil price, microbial flooding was a prospective technology for enhanced oil recovery...

... 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 surfactant - polymer (SP) combination flooding is a green technology can solve these problems caused by alkali. The key...

... mimicking the effect of salinity gradient. The resulting processes, when properly optimized, can achieve very high performances in terms of oil recovery with a limited amount of injected chemicals. Final performance, at lab scale, is comparable to the highly performing ASP/ SP processes in soft brines...

...Enhanced Oil Recovery Challenges Next paragraphs will be focused on the main EOR challenges, such as: project time to market, costs and mindset which prevented a wider spread of EOR deployments in the past. The authors will show as well eni efforts and implemented strategy to address the above...

...-Miscible and Miscible CO2 Flooding , 56th Annual Report on Research 2011, Reports: DNI949016-DNI9 . Baker , L. E. “Three-Phase Relative Permeability Correlations,” paper SPE 17369, presented at the SPE Enhanced Oil Recovery Symposium , Tulsa, Oklahoma, USA ( April 16–21 , 1988...

... 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...

... design. 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...

... 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...