...) as additives were formulated using different concentration ratio and prepared in fixed brine salinity. The surface tension (ST) and interfacial tension (IFT) behavior of the formulated mixtures were investigated by performing pendant and spinning drop tests at ambient and high temperature. In general...

... that applicability of cEOR in carbonate reservoirs is complicated by high temperature and salinity. Alvarez et al. (2014) carried out a study on adsorption of zwitterionic surfactant to measure the static adsorption. They utilized limestone and HPLC method for their experiments. Azad et al. (2014) investigated...

... sulfonates surfactants were made stable in high salinity injection water (6.76% TDS salinity) and high temperature of 90°C by formulating them into NS solution as described in our previous work ( Abdel-Fattah et al., 2017 ). Pictures of stable petroleum sulfonates encapsulated into NS ( Figure 3a...

... of calcium carbonate water- based drilling fluids, and (3) optimize the weight percent of bentonite. Rheological properties such as the apparent viscosity, plastic viscosity, yield point and gel strength were measured by using a high-pressure high-temperature rheometer. At low temperatures (85°F...

... Middle East reservoirs are usually characterized as high temperature and high salinity (HTHS). In chemical EOR, interfacial tension (IFT) is a key parameter that alters the reservoir environment. IFT measurements are challenging specially at high temperatures due to its dynamic nature. Viscoelastic...

... at high temperature application. Sample preparation To prepaer the PAM solution, the poylmer was dissolved in 2% Potassium Chloride (KCl) solution. The 2% KCl solution was in glass beaker on mgnetic strirrer at adequate speed to sustain a vortex while adding the PAM and initial polymer hydration...

... solubility in brine and high interfacial activity at oil-water interface should be satisfied at the same time. Abstract Chemical combination flooding technique (CCF) meets great technical challenges in High temperature, High salinity (HTHS) reservoir. The requirements on thermal stability, salt...

...  Results and Discussion Polymer Evaluation With the depletion of oil, revitalization of reservoirs with high temperature, low permeability or special lithology, for example, conglomerate, catches great attention of researchers. Nevertheless, harsh reservoir conditions impose great technical...

... viscosity chemical flooding methods betaine surfactant amidobetaine Interfacial Activity interfacial tension high temperature sulfonate solubility salinity reservoir amidobetaine surfactant crude oil enhanced oil recovery Introduction Presently, Alkali/Surfactant/Polymer (ASP) flooding...

... material system is capable of controlling loss of circulation into fractures of width up to 2 mm under high pressure (1500 psi) and high temperature (250 °F) conditions. The new two component lost circulation system will provide a reliable solution to address seepage to moderate type loss of circulation...

..., it is important to understand the corrosion that can results from using APCAs, and the methods that can be applied to reduce corrosion damage resulting from their use. The objective of this work is to evaluate the corrosion rate of APCAs on low-carbon steel at high temperatures and to determine the mechanism...

..., application of HPAM is limited because it is not suitable for high-temperature and high-salinity (HTHS) conditions. HPAM suffer a huge viscosity loss due to charge shielding effect and hydrolysis of the amide group. In presence of divalent cations, hydrolyzed product may also precipitate. In this work, we...

... flooding in high temperature, low salinity reservoir because the requirements on stability and interfacial tension decreasing capability of surfactant become more challenging. A betaine surfactant derived from oleic acid, which is a product hydrolyzed from renewable conventional vegetable oil...

... polymer sweep efficiency salinity enhanced recovery ve system viscosity viscoelastic surfactant complex reservoir Chemical EOR Applicability IFT reduction mobility control high temperature sea water wlm growth surfactant fracture Introduction Carbonate reservoirs are complex...

... etc. The pre-Khuff reservoir possesses very high temperature (in the range of 290-340 0 F) and high fracture gradient (0.6-0.95). Choice of particular fluid systems used during proppant fracturing is mainly governed by the bottomhole static temperature, treatment time and cost. Different types...

... such cases ( Jones et al. 1995 ). However, at very high temperatures (i.e., temperatures above 300°F), the diffusion rate of fluid must be significantly reduced. This can be feasible with the use of the emulsified acid system in which the acid droplets are encapsulated in a diesel phase. In this case...

... Abstract With the continued growth of petroleum demand, the oil and gas companies are searching in new or unexplored areas. The search is getting extreme in terms of depth, temperature and pressure. In deeper wells, high temperature and pressure and post cementing operations put extreme...

... Abstract Tahe oilfield in China belongs to fractured-vuggy carbonate reservoir with high temperature (100~130 celsius degree) and high salinity (two hundred thousand mg/L containing ten thousands mg/L of Ca 2+ and Mg 2+ ). After exploration for many years, the bottom water cones through...

... of spent acid in the formation. This work provides a comprehensive study of the effect of acid additives in spent acid on surface tension in tight gas carbonates. All experiments were conducted using Drop Shape Analysis (DSA) at high temperature and pressure. Different types of commonly used acid...

... the ambient temperature, this attenuation can be permanent. This article discusses the testing of a new type of optical fibre that is much less susceptible to hydrogen-induced failure. The performance of this fibre in high-temperature hydrogen tests is presented and this fibre is shown to be at least...