... Abstract This paper describes a series of experiments that used X-ray computer tomography (CT) to visualize the mobilization of remaining oil by Alkaline Surfactant Polymer (ASP) flooding after conventional waterflooding. The experiments were conducted in cores drilled from Gildehauser...

... combination flooding concentration Pilot Test surfactant reservoir foam flooding water flooding Introduction Most oilfields in China are characterized with continental sedimentation. The heterogeneity of reservoirs is very high. The developed reserves with water flooding account for more than 85...

... 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...

... of surfactant and polymer in carbonate porous media were investigated experimentally and analytically in order to study the mechanism and quantify the contribution of each effect. Single phase flow tests of surfactant, polymer and surfactant-polymer mixture were conducted on reservoir carbonate core plugs...

... In the reservoir, this surfactant slug will displace the brine in place with an average equal or higher salinity (as a result of mixing of injection brine with formation brine), depending on injection history. This will promote ultra-low IFT between the microemulsion phase and the oil...

... gas-chemical flood processes in porous media. Two different surfactant molecules are simultaneously applied: one to lower interfacial tension to ultra-low values and one to keep foam stable as gas mobility control agent. This process cannot currently be modeled using the commercial reservoir...

... Abstract Surfactant EOR is an attractive method to recover residual oil from light oil reservoirs. Selection of suitable surfactant for a particular reservoir conditions is a challenging and time consuming task. Surfactants have to be evaluated through a series of evaluation steps which include...

... that it is at optimum salinity conditions, i.e. Winsor type III micro-emulsion phase. Systematic studies of the performance of ASP at different (non-optimum) salinities are scarce, while operating at lower salinities condition can offer several advantages. These include: (1) lower surfactant retention and (2) increased...

... Abstract This paper presents full field offshoresurfactant-polymer (SP) floodingapplied in JZ 9–3 Oilfield, Bohai Bay, China. Followed by 3-year polymer flooding which produced 4% incremental oil, the field turned to surfactant-polymer flooding. In the first stage, SP flooding was implemented...

... Abstract The oil/water interfacial tension (IFT) is a key index of the properties of chemical enhanced oil recovery (EOR) displacement systems with surfactant. The studies showed that different oil and water often required different surfactant formulations to reduce IFT. The crude oil...

... Abstract CO 2 foam for enhanced oil recovery applications has been traditionally used in order to address mobility control problems occur during CO 2 flooding. However, the supercritical CO 2 foam generated by surfactant has a few shortcomings such as loss of surfactant to the formation due...

... and high temperatures due to their limited stability. Our objective is to introduce a novel alkyl ether carboxylate (AEC) based surfactant which exhibits both an outstanding tolerance against high temperatures and high salt concentrations, while delivering high interfacial activity. The solubility...

... −2 mN/m at optimal salinity) greatly enhance the oil recovery as demonstrated by ASP (Alkali Surfactant Polymer) floodings in homogeneous reservoirs. Ultra-low Ift values can efficiently decrease the entry pressure drop of oil-wet cores. Thus we here investigate the injection of foam with ultra-low...

... Alkaline Polymer Surfactant (ASP) flooding is an Enhanced Oil Recovery (EOR) technique aiming to mobilise remaining and residual oil. Estimating the average oil saturation prior to and post ASP flooding is a recognised challenge, but is vital to the evaluation of an ASP pilot. The use of oil...

... for a challenging reservoir. Foam was generated by simultaneous injection of CO 2 rich injection gas with selected surfactant formulation initially saturated with surfactant. Effect of series of injection rates were investigated as main parameters for foam propagation and stability under field condition...

... interpretation of the saturation development in the sandstone core as determined using spatially resolved nuclear magnetic resonance (NMR). The oil is a simple alkane (decane) but the surfactant combination is designed for EOR. The work is supported by surfactant phase behaviour, oil-water interfacial tension...

... Abstract The contribution of alkaline/Surfactant/Polymer to the stability of produced crude oil emulsions is neither fully understood nor thoroughly investigated although there have been reports from previous projects that implicate risk produced water treatment. This study focuses on water...

... Abstract Surfactant-polymer (SP) flooding is one of the most promising methods in enhanced oil recovery (EOR), especially where an existing waterflooding infrastructure is in place. This work is part of a broader research theme in which our group is evaluating the potential of biochemicals...

... the potential of alkaline surfactant (AS) flooding on a major oil reservoir at offshore Malaysia, besides to conduct the uncertainty assessment. High capital and operating expenditure are associated with chemical EOR (CEOR) projects. Therefore, key subsurface uncertainties quantified thoroughly for a robust...

... has been focused on using surfactants to change the wettability and enhance water imbibition into matrix blocks. Due to the fractured nature of carbonate formations, many advantages of these production methods are usually contrasted by their low recovery factor. Alternative processes are therefore...